For each Item Code, there can be several purchase lots with each purchase lot having a different Unit Cost. Thus, the Item Inventory Value computation should sum the costs of each lot.
The revised computation of Item Inventory Value should be "For Every Purchase Lot #, Set Item Inventory Value = Item Inventory Value + Lot Unit Cost * Lot Current Inventory End For".2. The trigger for the new use case should be the following. a. End of each month The trigger for the new use case should be the end of each month.3. Modify the use case and the data dictionary to satisfy the manager’s requirement.
In the new process, each Item Code should have one Unit Price but can have multiple Lot Unit Costs. This statement is true.4. When only the above use case and the data dictionary are changed to meet the new requirement, the change would affect the rest of the model for the new system in the following way(s): a. No impact on the rest of the model. When only the above use case and the data dictionary are changed to meet the new requirement, there will be no impact on the rest of the model.
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which of the following is a characteristic of the best enterprise systems, according to experts? a. completely redesign user workflows b. eliminate the biggest pain points c. require drastic changes to user input and output d. customized, one-of-a-kind software
The best enterprise systems, according to experts, are characterized by b. eliminating the biggest pain points.
Enterprise systems are designed to streamline and optimize business processes, and one of their primary objectives is to address pain points that hinder productivity and efficiency. By identifying and eliminating the most significant pain points, organizations can enhance their operations and achieve better results.
When enterprise systems eliminate pain points, they often introduce improvements such as automation, integration of disparate systems, and real-time data analysis. These enhancements help minimize manual tasks, reduce errors, and provide valuable insights for decision-making.
Moreover, by focusing on pain points, enterprise systems can address the specific needs and challenges of an organization. They provide tailored solutions that target the areas where the business faces the most difficulties, leading to a more effective and impactful implementation.
In summary, the best enterprise systems prioritize the elimination of the biggest pain points to enhance productivity and efficiency, automate processes, integrate systems, and provide valuable insights for decision-making.
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dchp does not require each individual network to have a server. instead, a dhcp forwards requests and responses between a client and the server.
DHCP does not require each individual network to have a server.
How does DHCP handle requests and responses between clients and servers?DHCP (Dynamic Host Configuration Protocol) operates by using a client-server model, where DHCP servers are responsible for providing IP addresses and network configuration information to clients. However, it is not necessary for each network to have a dedicated DHCP server. Instead, DHCP servers can be deployed at strategic points within a network infrastructure.
When a client needs an IP address or network configuration, it sends a DHCP request message. This message is broadcasted to the local network, and any available DHCP servers within the network receive the request. The DHCP server that receives the request then responds with a DHCP offer, providing the client with an available IP address and other configuration details.
The client selects one offer and sends a DHCP request message to accept the offer. Finally, the DHCP server acknowledges the client's request by sending a DHCP acknowledgment message, completing the process.
In this way, DHCP acts as an intermediary, forwarding requests and responses between clients and servers, ensuring efficient and dynamic allocation of IP addresses and network configuration information.
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This incomplete program is used by the staff at an Idaho state park to calculate fees for overnight stays. The park offers basic campsites, RV campsites (with water and electric hook-ups), and cabins. Campsites and cabins that have a river view cost more than those with a prairie view as shown in the table below. If a visitor pays to stay 5 nights or more, there is a 10\% discount applied for all nights of their stay. The program assumes that the staff inputs correct values. However, if the stay type or view type is invalid, an error will print and no price will be printed. " Parallel Lists of stay types, prairie view prices, and river_view_prices stay_types = ["Basic", "RV", "Cabin"] praitie viow prices ={12,24,50} river_view prices =[21,31,60] disc pet =0.1 \& 108 discount for 5 days of more I Get user inputs for camp_site, view type, and stay length camp_site = input ("What type of campsite would you like (Basic, RV, (Cabin) ?") view type = input ("Would you like a river view (R) or a prairie view (E) ?") 1 Ask user how many nights they plan to stay and store in stay_length ?2? Answer A ??? total price =0 # Initialize total price to confirm a price was calculated " Seareh through stay_types list to find user's camp_site and calculate prices for c, a stay in enumerate (stay_types): it camp site a a_stay: # check for mateh 2?? Answer B ?p? # Prairie View # Parallel Lists of stay_types, prairie_view prices, and river_view prices stay types = ["Basic", "RV", "Cabin"] prairie, view prices =[12,24,50] river_view_prices =[21,31,60] disc pct =0.1 # 10% discount for 5 days or more # Get user inputs for camp site, view type, and stay length camp site = input ("What type of campsite would you like (Basic, RV, Cabin)?") view type = input("Would you like a river view (R) or a prairie view (P) ?") \# Ask user how many nights they plan to stay and store in stay length ??? Answer A ??? total price =0 # Initialize total price to confirm a price was calculated # Search through stay types list to find user's camp site and calculate prices for c, a stay in enumerate(stay types): if camp site = a stay: # check for match ??? Answer B ??? # Prairie view elif view type == "R": # River view total price ??? Answer C ??? if stay length >=5 : # Eor a stay of 5 days or more apply discount ??? Answer D ??? if total price ==0: # Inputs did not match and no price was calculated print ("Please recheck your inputs and try again") else: # Print price to the nearest dollar due to national coin shortage print ("Total Price for this stay is \$" ??? Answer E ??? ". ")
The program allows the user to input their campsite type, view type, and stay length, and calculates the total price based on the provided information.
Here is the modified and completed version of the program:
# Parallel Lists of stay types, prairie view prices, and river_view_prices
stay_types = ["Basic", "RV", "Cabin"]
prairie_view_prices = [12, 24, 50]
river_view_prices = [21, 31, 60]
discount_pct = 0.1 # 10% discount for 5 days or more
# Get user inputs for camp site, view type, and stay length
camp_site = input("What type of campsite would you like (Basic, RV, Cabin)? ")
view_type = input("Would you like a river view (R) or a prairie view (P)? ")
stay_length = int(input("How many nights do you plan to stay? "))
total_price = 0 # Initialize total price to confirm a price was calculated
# Search through stay_types list to find user's camp_site and calculate prices
for i, stay in enumerate(stay_types):
if camp_site.lower() == stay.lower(): # check for match (case-insensitive)
if view_type.lower() == "p": # Prairie view
total_price = prairie_view_prices[i] * stay_length
elif view_type.lower() == "r": # River view
total_price = river_view_prices[i] * stay_length
else:
# Invalid view type
print("Invalid view type. Please choose either 'P' or 'R'.")
break
if stay_length >= 5:
# Apply discount for a stay of 5 days or more
total_price -= total_price * discount_pct
# Print price to the nearest dollar due to national coin shortage
print(f"Total Price for this stay is ${round(total_price)}.")
break
else:
# Inputs did not match and no price was calculated
print("Please recheck your inputs and try again.")
The program prompts the user for the campsite type, view type, and stay length.
It then searches for a match in the stay_types list and calculates the total price based on the corresponding prices and user inputs.
If the view type is invalid, an error message is printed.
If the stay length is 5 or more, a discount is applied.
The total price is then printed to the nearest dollar.
The program allows the user to input their campsite type, view type, and stay length, and calculates the total price based on the provided information. It also handles invalid inputs and applies discounts for longer stays.
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We are given a binary tree. The task is to transform every left child node odd by subtracting one and even child node even by adding one to it. We have to write solutions in linear time complexity and constant space.
We are given an array of sizes ‘N’. The task is to count greater elements on the left side of each array element.
To count the number of greater elements on the left side of each element in the given array, we can use a Binary Search Tree (BST) to iterate through the array and maintain a count.
We can solve this problem efficiently by utilizing the properties of a Binary Search Trees (BST. The idea is to construct a BST while iterating through the array. For each element, we insert it into the BST and maintain a count of the number of elements greater than the current element encountered so far.
Initially, the count is zero. We start iterating from the leftmost element of the array. For each element, we insert it into the BST. If the element is greater than the current node in the BST, it means there are elements to the left of the current node that are smaller than the current element.
So, we increment the count by one. If the element is smaller than the current node, we move to the left subtree. If the element is equal to the current node, we move to the right subtree. We repeat this process until we reach the end of the array.
By following this approach, we can count the number of greater elements on the left side of each array element in a linear time complexity, as each element is inserted into the BST only once. The space complexity is constant because we are using the BST to keep track of the count, and it does not require additional space proportional to the size of the array.
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An organization has a main office and three satellite locations.
Data specific to each location is stored locally in which
configuration?
Group of answer choices
Distributed
Parallel
Shared
Private
An organization has a main office and three satellite locations. Data specific to each location is stored locally in a private configuration.
A private configuration refers to a computing system in which there are separate physical components that are not shared. Each physical component is self-contained and separated from the other components. All of the resources that a private configuration needs are kept within the confines of the individual component that it is connected to. Hence, it is designed to meet specific user needs for specific uses.
In the given scenario, an organization has a main office and three satellite locations. Data specific to each location is stored locally in a private configuration. Therefore, "Private". The data is stored locally at each location so it can't be shared among other locations; thus, it is stored in a private configuration.
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Please code in HTML
You must create a personal website that features information about you. Your website will give a thorough account of you based on your status, preferences, educational background, interests, and other factors. With a focus on design, your website will employ photos (and maybe embedded video and audio).
You require to:
1. A picture of yourself that when clicked opens up an email client that by default has your email address in it and a subject heading.
2. Professional Page that includes a mirror of your curriculum vitae (Should not be an embedded document but created using HTML!!)
a) Your professional page should also include your professional vision statement and your mission statement for your career. [A vision defines where you want to be in the future. A mission defines where you are going now, describing your raison d’être. Mission equals the action; vision is the ultimate result of the action.]
3. Personal Page showcasing your traits and emotions. Likes, dislikes, hobbies etc. are used to show the world your character.
a) Provide a personal quote from a person you look up to the most. This person can be anyone, celebrity, sports icon, family member, friend, etc.
4. Should include at least one bookmark and one external hyperlink
Above is a basic structure of HTML that can be used to create a personal website with a picture of yourself that when clicked opens up an email client that by default has your email address in it and a subject heading.
A Professional Page is also included that includes a mirror of your curriculum vitae (Should not be an embedded document but created using HTML!!). Your professional page should also include your professional vision statement and your mission statement for your career.
The Personal Page showcases your traits and emotions. Likes, dislikes, hobbies etc. are used to show the world your character. A personal quote from a person you look up to the most should also be provided. Lastly, at least one bookmark and one external hyperlink should be included.
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Write a Python function called finalMark that calculates your final mark in ITI1120 (not the average mark). Each mark has a different weight: labs: 10%, Assignments: 24%, Test1: 6\%, Midterm: 20%, Final: 40% ) in our course. The function takes 5 variables as inputs (numbers up 100) and returns that mark. 0 The type contract is: (float, float, float, float, float) → float #test Q2 finalMark (100,100,100,100,100) 100.0 finalMark (50,90.5,60,80,70) 74.32
The finalMark Python function takes the weighted marks for labs, assignments, Test1, midterm, and final as inputs and returns the final mark in ITI1120.
The final mark is calculated by multiplying each mark with its corresponding weight and then summing up the weighted marks. The formula for calculating the final mark is as follows:
finalMark = (labs * 0.1) + (assignments * 0.24) + (Test1 * 0.06) + (midterm * 0.2) + (final * 0.4)
For example, if the input marks are labs = 100,
assignments = 100,
Test1 = 100,
midterm = 100, and
final = 100, the calculation would be:
finalMark = (100 * 0.1) + (100 * 0.24) + (100 * 0.06) + (100 * 0.2) + (100 * 0.4)
= 10 + 24 + 6 + 20 + 40
= 100
Therefore, the final mark in this case would be 100.0.
The finalMark function calculates the final mark in ITI1120 by applying the appropriate weights to the input marks and summing them up. It provides a convenient way to determine the overall performance in the course based on the specified weightings for different components.
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after reviewing the prohibited items list, do you feel that it is sufficient in preventing another attack?
The prohibited items list is an essential component in preventing cyber attacks, but it alone is NOT sufficient.
How is this so?Factors like TSA agent training, technology, and passenger vigilance contribute to airport security.
The TSA has implemented measures like increased screening, random searches, and armed officers.
However, terrorists may find ways to circumvent security. Passengers should report suspicious activity and be vigilant.
Other prevention methods include law enforcement cooperation, intelligence gathering, public awareness campaigns, and education. Taking a comprehensive approach strengthens security against terrorist attacks.
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A table of observed statistics for counting the set flags in captured TCP packets.
can you give an example
In network security and packet analysis, TCP flags provide information about the state and behavior of TCP connections. The flags are set within the TCP header and are used to control the flow of data and manage the connection between the sender and receiver.
TCP Flag Number of Packets
SYN 1500
ACK 2000
FIN 500
RST 100
PSH 800
URG 50
In this example, we have observed and counted the occurrences of different TCP flags in a set of captured TCP packets. The table displays the TCP flag types (SYN, ACK, FIN, RST, PSH, URG) and the corresponding number of packets in which each flag was set.
The table provides a summary of the observed statistics, allowing for easy analysis and understanding of the distribution of TCP flags in the captured packets.
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Compare the advantages and disadvantages of machine code, assembly language and
C/C++ programming language.
Machine code, assembly language, and C/C++ programming language have distinct advantages and disadvantages. Machine code offers direct hardware control but is low-level and difficult to program. Assembly language provides more abstraction and readability but is still low-level. C/C++ programming language is higher-level, offers portability, and supports modular programming, but can be complex and less efficient than lower-level languages.
Machine code is the lowest-level programming language that directly corresponds to the instructions understood by the computer's hardware. Its primary advantage is that it provides complete control over the hardware, allowing for maximum performance and efficiency. However, machine code is extremely low-level and lacks readability, making it challenging to write and understand. Programming in machine code requires a deep understanding of the computer's architecture and can be error-prone.
Assembly language is a step up from machine code as it uses mnemonic codes to represent machine instructions, making it more readable and easier to understand. Assembly language allows for more abstraction and simplifies the programming process compared to machine code. It provides direct access to the computer's hardware and offers flexibility for low-level optimizations. However, it still requires a good understanding of computer architecture and can be time-consuming to write and debug.
C/C++ programming language is a higher-level language that provides even more abstraction and portability compared to assembly language. It offers a wide range of built-in libraries and tools, making development faster and more efficient. C/C++ supports modular programming, allowing developers to break down complex tasks into smaller, manageable modules. It also provides portability across different platforms, enabling code reuse. However, C/C++ is more complex than assembly language, requires a compiler, and may not offer the same level of low-level control and performance as lower-level languages.
In summary, machine code offers maximum hardware control but is difficult to program, assembly language provides more readability and abstraction but is still low-level, and C/C++ programming language offers higher-level abstraction, portability, and modular programming but can be more complex and less efficient than lower-level languages.
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Define the field of Software Engineering (3 pts). 2. Software Engineering means "Programming in the Large". Explain what does this mean (5 pts). 3. What are all the problems related to the software crisis (5 pts)? 4. Explain why do we still need Software Engineering (5 pts). 5. Using concrete examples, explain the difference between generic and customized software products (5 pts). 6. Explain concretely the two problems of the year 2000 (6 pts).
Software engineering is a field that deals with the design, development, and maintenance of software systems. "Programming in the Large" refers to the development of complex and large-scale software projects. The problems with software crisis is complexity, poor quality, cost and schedule overruns, user dissatisfaction, and lack of collaboration. We still need software engineering to manage complexity, ensure quality, optimize performance, handle scalability and adaptability, and manage risks. Generic software products are versatile, while customized software products are tailored to specific requirements.The Y2K problem in the year 2000 involved date representation issues and software system dependencies.
1.
Software Engineering is the field of study and practice that deals with the design, development, and maintenance of software systems. It involves applying engineering principles and techniques to software development processes, aiming to create high-quality, reliable, and efficient software solutions.
2.
"Programming in the Large" refers to the process of developing software systems that are complex and large-scale in nature. It involves managing and coordinating multiple components, modules, and teams to create a cohesive and functioning software product.
3.
The problems related to the software crisis include:
1. Complexity:
Software systems are becoming increasingly complex, making it difficult to manage and understand their behavior and interactions.2. Poor quality:
Many software projects suffer from poor quality, including bugs, inefficiencies, and security vulnerabilities.3. Cost and schedule overruns:
Software projects often exceed their planned budgets and schedules, leading to financial and time constraints.4. Lack of user satisfaction:
Users may be dissatisfied with software products due to usability issues, functionality gaps, or performance problems.5. Lack of collaboration:
Ineffective communication and collaboration among stakeholders, developers, and users can lead to misunderstandings, misaligned expectations, and a lack of consensus on project requirements.4.
We still need Software Engineering because:
Complexity management: Software systems continue to grow in complexity, requiring systematic approaches and techniques to handle the challenges associated with their design, development, and maintenance.Quality assurance: Software Engineering helps in ensuring the quality and reliability of software systems through rigorous testing, verification, and validation processes.Efficiency and optimization: Software Engineering techniques enable the creation of efficient and optimized software solutions, improving performance and resource utilization.Scalability and adaptability: Software Engineering provides methodologies and practices that allow software systems to scale and adapt to changing requirements and technologies.Risk management: Software Engineering helps in identifying and mitigating risks associated with software projects, reducing the likelihood of failures and financial losses.5.
Generic software products are designed to be versatile and applicable to a wide range of users or industries. They are developed with a set of predefined features and functionalities that cater to common needs. Examples of generic software products include word processors, spreadsheet applications, and email clients.
On the other hand, customized software products are specifically tailored to meet the unique requirements and preferences of a particular user or organization. They are designed to address specific business processes or industry-specific needs.
Examples of customized software products include enterprise resource planning (ERP) systems, customer relationship management (CRM) software, and financial management systems developed for specific companies.
6.
The two problems of the year 2000, commonly referred to as the Y2K problem, were:
1. Date representation issue:
Many computer systems and software applications stored and processed dates using a two-digit representation of the year, omitting the century digits. This led to concerns that when the year 2000 arrived, the systems would interpret it as 1900, causing calculation errors, data inconsistencies, and system failures.2. Software system dependencies:
The Y2K problem was exacerbated by the fact that many software systems and applications relied on date calculations and comparisons for critical functions, such as financial transactions, inventory management, and scheduling. The incorrect handling of dates could have had significant impacts on these systems, potentially disrupting operations and causing financial losses.To learn more about software engineering: https://brainly.com/question/28488509
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Write a C++ program that does the following: Define a class myInt that has as its single attribute an integer variable and that contains member functions for determining the following information for an object of type myInt: A. Is it multiple of 7,11 , or 13. B. Is the sum of its digits odd or even. C. What is the square root value. D. Is it a prime number. E. Is it a perfect number ( The sum of the factors of a perfect number is equal to the number itself - for example : 1+2+ 4+7+14=28, so 28 is a perfect number ). Write a interface that tests your functions
Here is a C++ program that defines a class named myInt and has member functions for determining whether it's a multiple of 7, 11, or 13, whether the sum of its digits is odd or even, what its square root value is, whether it's a prime number, and whether it's a perfect number:```#include
#include
using namespace std;
class myInt {
private:
int n;
public:
myInt(int x) {
n = x;
}
bool isMultipleOf(int x) {
if (n % x == 0) {
return true;
}
return false;
}
bool isMultipleOf7() {
return isMultipleOf(7);
}
bool isMultipleOf11() {
return isMultipleOf(11);
}
bool isMultipleOf13() {
return isMultipleOf(13);
}
bool isSumOfDigitsOdd() {
int sum = 0;
int x = n;
while (x > 0) {
sum += x % 10;
x /= 10;
}
if (sum % 2 == 0) {
return false;
}
return true;
}
double getSquareRoot() {
return sqrt(n);
}
bool isPrime() {
if (n < 2) {
return false;
}
for (int i = 2; i <= sqrt(n); i++) {
if (n % i == 0) {
return false;
}
}
return true;
}
bool isPerfect() {
int sum = 1;
for (int i = 2; i <= sqrt(n); i++) {
if (n % i == 0) {
sum += i;
if (i != n / i) {
sum += n / i;
}
}
}
if (sum == n) {
return true;
}
return false;
}
};
int main() {
int n;
cout << "Enter an integer: ";
cin >> n;
myInt x(n);
cout << "Multiple of 7: " << x.isMultipleOf7() << endl;
cout << "Multiple of 11: " << x.isMultipleOf11() << endl;
cout << "Multiple of 13: " << x.isMultipleOf13() << endl;
cout << "Sum of digits is odd: " << x.isSumOfDigitsOdd() << endl;
cout << "Square root: " << x.getSquareRoot() << endl;
cout << "Prime: " << x.isPrime() << endl;
cout << "Perfect: " << x.isPerfect() << endl;
return 0;
}```
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Name the system that monitors computer systems for suspected attempts at intrusion. Explain how it works.
The system that monitors computer systems for suspected attempts at intrusion is called Intrusion Detection System (IDS). IDS is a software or hardware tool that works in real-time to detect malicious activity and violations of computer security policies.
The main purpose of IDS is to detect and alert about attacks or unauthorized access attempts on the network.
IDS can monitor the system in two different ways:
Network-based intrusion detection systems (NIDS) and Host-based intrusion detection systems (HIDS).NIDS monitors the entire network, analyzing traffic as it flows from one node to another. It uses various detection methods, such as signature-based detection, anomaly-based detection, and protocol-based detection. In contrast, HIDS monitors a single host and its system logs to detect security issues such as configuration changes, login attempts, or access control changes.
The IDS works by analyzing the network traffic, looking for signatures of known attacks, or unusual traffic patterns that may indicate an attack. IDS uses different techniques to identify the threats, such as pattern matching, rule-based, or heuristic-based methods. Once the IDS detects any malicious activity, it raises an alert to the network administrator or security team.
The alert could be a log entry, email notification, or SMS message, providing critical information about the attack, such as the attacker's IP address, the type of attack, and the destination of the attack.
By monitoring the system, IDS helps organizations to identify and respond to security incidents before they can cause damage to the network or data. IDS is an essential tool for any organization that aims to protect its digital assets from cyber-attacks, data breaches, and other security incidents.
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in conducting a computer abuse investigation you become aware that the suspect of the investigation is using abc company as his internet service provider (isp). you contact isp and request that they provide you assistance with your investigation. what assistance can the isp provide?
ISPs can provide assistance in a computer abuse investigation by disclosing user information, providing connection logs, email records, internet usage data, network logs, and complying with legal processes.
What assistance can the ISP provide?When we contact an internet service provider for help in a case of computer abuse investigation, they can help us through;
1. User Information: Using ISP, it can help to expose the information of the subscriber that is connected to the suspect's account. This can help track the suspect.
2. Connection Logs: This can help to keep records of internet connections which includes the IP addresses, timestamps and the duration of the sessions.
3. Email and Communication Records: It can also help to provide the content of the suspect email record and the timestamps between each message.
4. Internet Usage Data: It also help to track down the internet usage of the suspect such as browsing details, bandwidth usage etc.
5. Network Logs and Monitoring: In some cases, ISPs may have network monitoring systems in place that can capture traffic data, including packet captures, to help investigate network-related abuses or attacks. They can provide relevant logs or assist in analyzing network traffic.
6. Compliance with Legal Processes: ISPs must comply with lawful requests for assistance in investigations.
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Self-assignment not permitted
firstStudent: 134 id number
copyFirstStudent: 5 id number
Destructor called
Destructor called
#include
using namespace std;
class Student {
public:
Student();
~Student();
void setIdNumber(int newIdNumber);
void Print() const;
Student& operator=(const Student& studentToCopy);
private:
int* idNumber;
};
Student::Student() {
idNumber = new int;
*idNumber = 0;
}
Student::~Student() {
cout << "Destructor called" << endl;
delete idNumber;
}
/* Your code goes here */ {
if (this != &studentToCopy) {
delete idNumber;
idNumber = new int;
*idNumber = *(studentToCopy.idNumber);
}
else {
cout << "Self-assignment not permitted" << endl;
}
return *this;
}
void Student::setIdNumber(int newIdNumber) {
*idNumber = newIdNumber;
}
void Student::Print() const {
cout << *idNumber << " id number" << endl;
}
int main(){
int idNumber;
Student firstStudent;
Student copyFirstStudent;
cin >> idNumber;
firstStudent.setIdNumber(idNumber);
firstStudent = firstStudent; // Test self-assignment
copyFirstStudent = firstStudent;
firstStudent.setIdNumber(134);
cout << "firstStudent: ";
firstStudent.Print();
cout << "copyFirstStudent: ";
copyFirstStudent.Print();
return 0;
}
The main issue in the given code is that it does not handle self-assignment properly. In the line "firstStudent = firstStudent;", the code performs self-assignment, which can lead to unexpected behavior and memory leaks. To fix this, a self-assignment check should be added to the assignment operator function. By comparing the memory addresses of the current object and the object being assigned, self-assignment can be detected and avoided. If self-assignment is detected, the function should simply return without performing any operations.
The provided code defines a class called "Student" that represents a student with an ID number. The class has a constructor, a destructor, member functions to set and print the ID number, and an assignment operator overload.
However, the code does not handle self-assignment properly in the assignment operator overload. When the line "firstStudent = firstStudent;" is executed, the assignment operator is called with the same object on both sides of the assignment. This results in self-assignment, which can lead to issues such as memory leaks and incorrect behavior.
To fix this, a self-assignment check should be added to the assignment operator function. This check ensures that the assignment is only performed when the objects being assigned are distinct. By comparing the memory addresses of the current object (referred to by "this") and the object being assigned (referred to by "studentToCopy"), self-assignment can be detected. If self-assignment is detected, the function should simply return without performing any operations.
By adding the self-assignment check, the code will avoid unnecessary operations and prevent potential issues that can arise from self-assignment.
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write a sql query using the spy schema for which you believe it would be efficient to use hash join. include the query here.
A SQL query that would be efficient to use hash join in the SPY schema is one that involves joining large tables on a common column.
Why is hash join efficient for joining large tables on a common column?Hash join is efficient for joining large tables on a common column because it uses a hash function to partition both tables into buckets based on the join key.
This allows the database to quickly find matching rows by looking up the hash value, rather than performing a costly full table scan.
Hash join is particularly beneficial when dealing with large datasets as it significantly reduces the number of comparisons needed to find matching rows, leading to improved performance and reduced execution time.
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the ________ is the benchmark for speed and the organizing factor in nonvolatile storage.
The solid-state drive (SSD) is the benchmark for speed and serves as the organizing factor in nonvolatile storage.
The solid-state drive (SSD) is widely regarded as the benchmark for speed in the realm of nonvolatile storage. Unlike traditional hard disk drives (HDDs) that rely on spinning magnetic disks and mechanical components, SSDs utilize flash memory technology to store and retrieve data rapidly. The absence of moving parts in SSDs results in significantly faster data access and transfer speeds compared to HDDs, making them the preferred choice for users seeking high-performance storage solutions.
In addition to speed, SSDs also play a crucial role as the organizing factor in nonvolatile storage. Nonvolatile storage refers to the ability of a storage medium to retain data even when power is disconnected. SSDs excel in this aspect as well, as they retain data without the need for constant power supply. This feature is particularly important in scenarios where data persistence is critical, such as in enterprise storage systems, personal computers, and data centers. Moreover, the inherent durability and reliability of SSDs contribute to their effectiveness as the organizing factor in nonvolatile storage, ensuring data integrity and accessibility over extended periods. Overall, the speed and organizational capabilities of SSDs make them the go-to choice for high-performance and reliable nonvolatile storage solutions.
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Discussion Question:
When scheduling a project, why is it important to
understand the activity precedence prior to creating a
network?
(min. 100 words, max. approximately 300 words):
When scheduling a project, it is important to understand the activity precedence prior to creating a network as this helps to ensure that the project is completed successfully. This allows the project manager to create a realistic schedule that accounts for all the necessary activities and ensures that they are completed in the correct order.
Activity precedence refers to the order in which the different activities in a project need to be completed. This order is determined by the dependencies that exist between the activities. For example, if one activity cannot be started until another activity is completed, then the first activity is said to be dependent on the second activity.When creating a network for a project, the activity precedence needs to be understood so that the network can accurately reflect the dependencies that exist between the different activities. This helps to ensure that the project is scheduled realistically and that all the necessary activities are accounted for.
One of the key benefits of understanding activity precedence is that it helps to avoid delays and other issues that can occur when activities are not completed in the correct order. By identifying the dependencies that exist between activities, project managers can ensure that each activity is completed in the right sequence and that there are no unnecessary delays that can impact the overall project timeline.Overall, understanding activity precedence is critical when scheduling a project, as it helps to ensure that the project is completed successfully. By identifying the dependencies between activities, project managers can create a realistic schedule that accounts for all the necessary activities and ensures that they are completed in the correct order.
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Write a function that computes MPG for a car. To test your function prompt the user to enter the number of miles driven and the number of gallons used. Use appropriate type conversion function to convert user inputs to a numerical type. Then call the function and pass user inputs to the function. Print a message with the answer.
Here's a function that computes the MPG (miles per gallon) for a car based on user inputs:
def calculate_mpg(miles, gallons):
mpg = miles / gallons
return mpg
def main():
# Prompt the user for inputs
miles = float(input("Enter the number of miles driven: "))
gallons = float(input("Enter the number of gallons used: "))
# Calculate MPG
mpg = calculate_mpg(miles, gallons)
# Print the result
print("The MPG for the car is:", mpg)
# Call the main function
if __name__ == "__main__":
main()
In this code, the calculate_mpg function takes two parameters: miles and gallons. It calculates the MPG by dividing the number of miles driven by the number of gallons used and returns the result.
The main function prompts the user to enter the number of miles driven and the number of gallons used, converts the inputs to numerical types using float, calls the calculate_mpg function with the user inputs, and then prints the calculated MPG.
Make sure to use float type conversion function to handle decimal values for miles and gallons if needed.
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When using two GPS receivers (e.g. a base and a rover) to collect positional data for later differential correction by post processing
Question 15 options:
O both receivers must be of the same manufacture
O both must be at a known location
O both receivers must have at least 12 channels
O both receivers must be tracking the same satellites at the same time
O all of these are requirements
In the scenario of using two GPS receivers (base and rover) to collect positional data for later differential correction by post-processing, the requirement is that both receivers must be tracking the same satellites at the same time. Option d is correct.
This is crucial for accurate differential correction, as it allows for the calculation of the precise positioning differences between the base and rover receivers.
Having both receivers track the same satellites ensures that they receive the same signals and can later be differentially corrected to improve the accuracy of the collected positional data.
While the other options (same manufacturer, known location, and minimum 12 channels) may be beneficial or practical considerations, they are not absolute requirements for the differential correction process.
Therefore, d is correct.
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Implement function Sum_Digits() that takes a three-digit integer as input and returns the integer obtained by summing its digits. For example, if the input is 123, your function should return 6 ( 1+2+3) . You are not allowed to use the string data type operations to do this task. Your program should simply read the input as an integer and process it as an integer using operators such as // and %. You may assume that the input integer does not end with the 0 digit.
The Sum_Digits() function takes a three-digit integer as input, extracts the digits using division and modulus operations, and returns the sum of the digits.
Here's the Python code implementation of the Sum_Digits() function:
def Sum_Digits(num):
# Extract the hundreds, tens, and one's digits
hundreds = num // 100
tens = (num // 10) % 10
ones = num % 10
# Calculate the sum of the digits
digit_sum = hundreds + tens + ones
# Return the sum
return digit_sum
In this implementation, the function takes a three-digit integer as input (num). It uses integer division (//) and modulus (%) operators to extract the hundreds, tens, and one's digits from the input number. Then, it calculates the sum of these digits and returns the result (digit_sum).
Please note that this implementation assumes that the input integer is a three-digit number and does not end with a 0 digit, as mentioned in the problem statement.
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"Add the following commands when calling the compiler" checked 4. Middle box à −std=c++11 5. "Add the following commands when calling the linker" checked 6. Bottom box: à -static-libgcc Create a New C+ + Console Application Project 1. Use the file that was been created automatically (main.cpp) as the driver 2. An include statement has been added automatically for the iostream library, Below this, add the include statement for Car.h. Remember to use double-quotes instead of the angle brackets. 3. Add a using directive for the std namespace. 4. Save main.cpp for now. Add another file to this project: 1. Right-click the name of the project in the Project browser pane (which is on the left side of the Dev-Cpp window) > click New File 2. Save this new file by clicking the Save icon > name it Car. Be sure to change the "Save as type" option to header files (h))! Add the code to define the Car class to this file: 1. Type: class Car \{ a. The closing curly brace and the terminating semicolon will be added automatically, and the rest of the code for this class will go inside these curly braces. 2. Add a private data member to store the number of doors 3. Add public setter and getter functions for this data member. 4. Create another function called carType that has no parameters and returns a string. (Remember to use std:: here.) This function uses a selection structure to determine the type of car. If the car has 2 doors or less, return the string "sports car". If it has more than 2 doors, return the string "sedan". (Feel free to use different values and types of cars if you like.). Save Car.h In main.cpp, write the code in the main function: Within a repetition structure that executes exactly 3 times, write the C+ t code to: 1. Instantiate a Car object. 2. Ask the user for the number of doors for this car. 3. Update the data member of the car object with this number, by calling the appropriate function of the Car object. (Step 3 above.) 4. Call the carType function of the car object and print the result of this function call to the screen. (Note that there is only ONE data member in this class - the number of doors. Do not save the type as a data member.)
While calling the compiler, we need to add the following commands to the compiler: -std=c++11.
When calling the linker, the following commands need to be added: -static-libgcc.
To create a new C++ console application project, follow these steps:Use the file that was created automatically (main.cpp) as the driver. An include statement has been added automatically for the iostream library. Below this, add the include statement for Car.h.
Remember to use double-quotes instead of the angle brackets.
Add a using directive for the std namespace. Save main.cpp for now.
Add another file to this project. Right-click the name of the project in the Project browser pane (which is on the left side of the Dev-Cpp window) and click New File.
Save this new file by clicking the Save icon and name it Car. Be sure to change the "Save as type" option to header files (h).
Add the code to define the Car class to this file. To do this, type: class Car
{a. The closing curly brace and the terminating semicolon will be added automatically, and the rest of the code for this class will go inside these curly braces.
b. Add a private data member to store the number of doors.
c. Add public setter and getter functions for this data member.
d. Create another function called carType that has no parameters and returns a string. (Remember to use std:: here.)
This function uses a selection structure to determine the type of car. If the car has 2 doors or less, return the string "sports car". If it has more than 2 doors, return the string "sedan". Save Car.h.
In main.cpp, write the code in the main function:
Within a repetition structure that executes exactly 3 times, write the C++ code to:
Instantiate a Car object.Ask the user for the number of doors for this car.
Update the data member of the car object with this number, by calling the appropriate function of the Car object. (Step 3 above.)
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In quantum computing, the equivalent of a bit of information is often called:
O Qubit
De-Bit
DarkBit
Al-Bit
In quantum computing, the equivalent of a bit of information is often called qubit. unit of quantum information that is the equivalent of a classical bit used in conventional computing.
In quantum computing, qubits are represented using quantum systems, such as individual atoms, ions, or superconducting circuits. A qubit can exist in any superposition of its basis states, as opposed to a classical bit, which can only exist in one of two states (0 or 1) at any given time. :A quantum bit (qubit) is a fundamental building block of quantum information.
It can be implemented with a two-level quantum system, such as the spin of an electron or the polarization of a photon. Because of the counterintuitive nature of quantum mechanics, qubits can exist in superpositions of the two basis states, leading to phenomena like quantum entanglement, which is the basis of many quantum algorithms.
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Implement four versions of a function funProd that takes a positive integer n as input and returns the product of n and the sum of integers from 1 to and including n, using a for loop in funProd1, using a while loop in funProd2, using a do-while loop in funProd3, and using recursion in funProd4. Your output for the included test code should be:
funProd1(10) = 550
funProd2(10) = 550
funProd3(10) = 550
funProd4(10) = 550
The function `funProd` can be implemented in four different ways to calculate the product of a positive integer `n` and the sum of integers from 1 to `n`. These implementations can be done using a for loop (`funProd1`), a while loop (`funProd2`), a do-while loop (`funProd3`), and recursion (`funProd4`). The desired output for `funProd1(10)`, `funProd2(10)`, `funProd3(10)`, and `funProd4(10)` is 550.
To implement these versions of `funProd`, follow the steps below:
1. funProd1 using a for loop:
Initialize a variable `sum` to 0.Use a for loop to iterate from 1 to `n`.Within each iteration, add the current number to the `sum`.After the loop, return the product of `n` and `sum`.2. funProd2 using a while loop:
Initialize a variable `sum` to 0 and a counter variable `i` to 1.Use a while loop with the condition `i <= n`.Within each iteration, add `i` to the `sum` and increment `i` by 1.After the loop, return the product of `n` and `sum`.3. funProd3 using a do-while loop:
Initialize a variable `sum` to 0 and a counter variable `i` to 1.Use a do-while loop.Within each iteration, add `i` to the `sum` and increment `i` by 1.Continue the loop until `i` is greater than `n`.After the loop, return the product of `n` and `sum`.4. funProd4 using recursion:
Define a recursive function `funProd4` that takes `n` as an argument.Base case: If `n` is 1, return 1.Recursive case: Return the product of `n` and the recursive call to `funProd4` with `n-1` as the argument.The four versions of `funProd` can be implemented using different loop structures and recursion to calculate the product of `n` and the sum of integers from 1 to `n`. These implementations provide the same desired output of 550 for `funProd1(10)`, `funProd2(10)`, `funProd3(10)`, and `funProd4(10)`.
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The AeroCar class is derived from Carand it overrides the setSpeed(double) member function. In the AeroCar setSpeed function, how can the Car setSpeed function be called?
a) ::setSpeed(newSpeed)
b) The Car setSpeed function cannot be called from the AeroCar::setSpeed function.
c) Car::setSpeed(newSpeed)
super::setSpeed(newSpeed)
d) Car::setSpeed()
It is possible to invoke the setSpeed function of the Car from inside the setSpeed function of the AeroCar by using the syntax "Car::setSpeed(newSpeed)".
When a derived class in C++ overrides a member function of its base class, it has the option to explicitly call the base class's version of that method. This is because both versions of the function are stored in the object's memory. In this example, since the AeroCar class is derived from the Car class and overrides the setSpeed method, it is able to invoke the setSpeed function of the Car class by using the scope resolution operator "::" together with the name of the base class and the name of the function. In other words, the AeroCar class is able to call the setSpeed function of the Car class.
As a result, the appropriate response is choice (c), which is "Car::setSpeed(newSpeed)". The setSpeed method that is defined in the Car class may be called from the AeroCar class using this syntax. The new speed can be sent in as an argument to the setSpeed function. By using this method, the AeroCar class is able to make use of the functionality that is offered by the setSpeed function that is supplied by the Car class, while at the same time implementing its own unique behaviour in the setSpeed override that is provided by the AeroCar class.
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Implement an object named: Name
It has two attributes: firstName and lastName
They are private instance variables, of type String
Default for firstName should be "Ruby"; the lastName should be "Jewel"
Have setters and getters: setFirstName(), getFirstName(), setLastName(), getLastName()
Write the method toString() that returns "firstName lastName"
Write the method lastFirst() that returns "lastName, firstName"
Provide two constructors: Name() and Name(String firstName, String lastName).
Optionally a constructor Name(Name name).
>>>>>>>>>>>>>Write a main method to test the class.
PROBLEM #2: (2 points)
Implement an object named: Student
It has attributes: name (Name), id (int), major (String)
They are private instance variables
Default for id is 99999, major "Computer Science"
Have setters and getters: setName(), getName(), setId(), getId(), setMajor(), and getMajor()
Write the method toString() that returns
Student Name: firstName lastName
Student ID: id
Student Major: major
HINT: new line "\n"
Provide three constructors:
Student()
Student(Name name, int id, String major)
Student(String firstName, String lastName, int id, String major)
>>>>>>>>>>>>>>>>Write a main method to test the class.
PROBLEM #3 (6 points)
Add a class variable named size, to the Student class that counts the number of students created
private static int size = 0; //Reference: To distinguish between instance and static variables and methods ( chapter 9 section 7).
Create a class Address
addressLine1: String
addressLine2: String
Default for addressLine1 is "123 Success Street" and addressLine2 is "Goldville CA 91111"
setters and getters OR mutators and accessors: setAddressLine1(), get AddressLine1(), setAddressLine2(), get AddressLine2()
Constructors - no arguments constructor AND a constructor that takes in 2 Strings.
toString()
Add the attribute Address to the Student class
Re-write the Constructors to include address; update all other methods; and test your code
Write a Test class (the Main class if using repl.it) to test all three classes. The Name, Student and Address.
The implementation of the classes Name, Student, and Address, along with a main method to test them:
```java
public class Main {
public static void main(String[] args) {
// Testing the Name class
Name name = new Name();
System.out.println(name.toString());
System.out.println(name.lastFirst());
// Testing the Student class
Student student1 = new Student();
System.out.println(student1.toString());
Student student2 = new Student(new Name("John", "Doe"), 12345, "Computer Science");
System.out.println(student2.toString());
Student student3 = new Student("Jane", "Smith", 67890, "Mathematics");
System.out.println(student3.toString());
// Testing the Address class
Address address = new Address();
System.out.println(address.toString());
Address customAddress = new Address("456 Success Avenue", "Silverville CA 92222");
System.out.println(customAddress.toString());
}
}
```
The main method is implemented to test the classes: Name, Student, and Address. It creates instances of these classes and calls their methods to verify their functionality.
For the Name class, it creates a Name object and prints the full name using the `toString()` method and the last name followed by a comma and the first name using the `lastFirst()` method.
For the Student class, it creates three instances of students: one using the default constructor, one with a custom Name object, ID, and major, and one with separate first name, last name, ID, and major. It then prints the student information using the `toString()` method.
For the Address class, it creates two instances: one using the default constructor and one with custom address lines. It then prints the address information using the `toString()` method.
The main method allows us to test the functionality of the implemented classes. It ensures that the constructors, setters, getters, and other methods work correctly and produce the expected outputs. By executing the main method, you can observe the outputs of the class instances, including names, IDs, majors, and addresses.
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# This RegEx is for the phone number. It'ss set for (XXX)-XXX-XXXX - don't change it!
pReg = re.compile(r'\d{3}-\d{3}-\d{4}')
# Now make two regexes of your own. One is for the email addresses and another
# is for dates.
# The dates will follow the MM/DD/YYYY format. Note that some dates may not
# need to use all of their possible characters. For example, 2/2/2020 fits the
# format, but would get missed by a RegEx looking for MM/DD/YYYY EXPLICITLY.
# Now, the .txt file needs to be checked using the regexes we created. I will
# give you the one for phone numbers to get you started.
# Remember to copy the search file to the clipboard before running the program.
info = str(pyperclip.paste())
matchlist = []
matchObject = pReg.findall(info)
print()
print('Phone numbers:')
for x in matchObject:
print(x)
print()
# Now that you have been given this example, search the text on the
# clipboard for emails and dates using your own regexes. Print the
# results to the screen.
print ('\nHmmm ... I wonder what\'s significant about the dates.') # DO NOT CHANGE.
The updated version of the code that includes regular expressions for email addresses and dates is:
import re
import pyperclip
# Regular expression for phone numbers (already provided)
pReg = re.compile(r'\d{3}-\d{3}-\d{4}')
# Regular expression for email addresses
emailReg = re.compile(r'\b[A-Za-z0-9._%+-]+(at)[A-Za-z0-9.-]+\.[A-Za-z]{2,}\b')
# Regular expression for dates (MM/DD/YYYY format)
dateReg = re.compile(r'\b\d{1,2}/\d{1,2}/\d{4}\b')
# Retrieve the text from the clipboard
info = str(pyperclip.paste())
# Find phone numbers in the text
matchObject = pReg.findall(info)
print('Phone numbers:')
for x in matchObject:
print(x)
print()
# Find email addresses in the text
matchObject = emailReg.findall(info)
print('Email addresses:')
for x in matchObject:
print(x)
print()
# Find dates in the text
matchObject = dateReg.findall(info)
print('Dates:')
for x in matchObject:
print(x)
print()
In this updated code, I've added two more regular expressions: emailReg for matching email addresses and dateReg for matching dates in the MM/DD/YYYY format. The code uses the findall method to find all occurrences of matches for each regular expression in the text retrieved from the clipboard.
After finding matches for each pattern, the code prints the results to the screen. Phone numbers are printed first, followed by email addresses, and then dates.
You can copy the text you want to search to the clipboard and then run the program to see the phone numbers, email addresses, and dates that match the respective regular expressions.
Note change 'at' with its symbol before running
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Given below, please break down the driver class and write corresponding parts to classes where they belong to. (Note: each class resembles one java file and i don't want to have last driver class and want its content to be seperated into other classes) thank you in advance!
Java Code:
// the parent class class Vehicle{
// parent class variables
protected int numberOfWheels;
protected String sound, make;
// method to return the number of wheels of the vehicle
public int countWheels(){
return numberOfWheels;
}
// method to return the sound that vehicle makes when moving
public String move(){
return sound;
}
// method to return the make of the vehicle
public String getmake(){
return make;
}
}
// child class car inherits properties(variables and methods) of oarent class vehicle
class Car extends Vehicle{
// this class variable
private int year;
// parameterized constructor to initialize child and parent class variables
public Car(int year,String make){
this.year=year;
numberOfWheels = 4;
super.sound="vroom vroom";
super.make=make;
}
// override parent class method move() to return sound of the car
public String move(){
return super.move();
}
// override parent class method getmake() to return make of the car
public String getmake(){
return super.getmake() + " is a make of car";
}
// displays class object's properties
public String toString(){
return year + " "+ this.getmake();
}
}
// child class boat inherits properties(variables and methods) of parent class vehicle
class Boat extends Vehicle{
// this class variable
private int numberOfSeats;
public Boat(int numSeats,String make){
numberOfSeats=numSeats;
super.make=make;
super.sound="sploosh splash";
super.numberOfWheels=0;
}
// override parent class method move() to return sound of the boat
public String move(){
return super.move();
}
// override parent class method getmake() to return make of the boat
public String getmake(){
return super.getmake() + " is a make of boat";
}
// displays class object's properties
public String toString(){
return this.getmake() + " with "+ numberOfSeats+" seats";
}
}
// child class bike inherits properties(variables and methods) of parent class vehicle
class Bike extends Vehicle{
private int totalDistance;
public Bike(int tot, String make){
totalDistance=tot;
super.make=make;
super.numberOfWheels=2;
super.sound="RrrrrRrrrRRrrrrrrr";
}
// override parent class method move() to return sound of the bike
public String move(){
return super.move();
}
// override parent class method getmake() to return make of the bike
public String getmake(){
return super.getmake() + " is a make of bike";
}
// displays class object's properties
public String toString(){
return this.getmake() + " which has travelled "+totalDistance+" kilometers";
}
}
// driver class to test the above classes public class Main
{
public static void main(String[] args) {
// creating child class objects with parameter values of corresponding vehicle properties Vehicle make1 = new Car(2022, "Mercedes A Class");
Vehicle make2 = new Boat(3, "Boaty McBoatFace");
Vehicle make3 = new Bike(10000, "Harley Davidson");
// display object of each class
System.out.println(make1);
System.out.println(make2);
System.out.println(make3);
// display the sound of the vehicle when moving
System.out.println("\nCar Moving: "+make1.move());
System.out.println("Boat Moving: "+make2.move());
System.out.println("Bike Moving: "+make3.move());
// displays individual make and type of the vehicle
// System.out.println("\n"+make1.getmake());
// System.out.println(make2.getmake());
// System.out.println(make3.getmake());
}
}
The given code is an example of inheritance and polymorphism in Java. We can break down the driver class as follows: Java code for Vehicle class: ```class Vehicle{protected int numberofwheels; protected String sound, make; public int countWheels(){return numberOfWheels;}public String move(){return sound;}public String getmake(){return make;}}```
Java code for Car class: '''class Car extends Vehicle{private int year; public Car(int year, String make){this.year=year; numberOfWheels=4; super.sound="vroom vroom"; super.make=make;} public String move(){return super.move();} public String getmake(){return super.getmake() + " is a make of car";}public String toString(){return year + " " + this.getmake();}}```
Java code for Boat class: ```class Boat extends Vehicle{private int numberOfSeats; public Boat(int numSeats, String make){numberOfSeats=numSeats; super.make=make; super.sound="sploosh splash"; super.numberOfWheels=0;}public String move(){return super.move();}public String getmake(){return super.getmake() + " is a make of boat";}public String toString(){return this.getmake() + " with " + numberOfSeats + " seats";}}```
Java code for Bike class: ```class Bike extends Vehicle{private int totalDistance; public Bike(int tot, String make){totalDistance=tot; super.make=make; super.numberOfWheels=2; super.sound="RrrrrRrrrRRrrrrrrr";}public String move(){return super.move();}public String getmake(){return super.getmake() + " is a make of bike";}public String toString(){return this.getmake() + " which has travelled " + totalDistance + " kilometers";}}```
Java code for Driver class:```public class Main{public static void main(String[] args){Vehicle make1=new Car(2022, "Mercedes A Class");Vehicle make2=new Boat(3, "Boaty McBoatFace");Vehicle make3=new Bike(10000, "Harley Davidson");System.out.println(make1);System.out.println(make2);System.out.println(make3);System.out.println("\nCar Moving: " + make1.move());System.out.println("Boat Moving: " + make2.move());System.out.println("Bike Moving: " + make3.move());}}```
We broke down the driver class into four separate classes: Vehicle, Car, Boat, and Bike. The Vehicle class is the parent class, while the Car, Boat, and Bike classes are all child classes that inherit from the Vehicle class.
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After breaking down the driver class and writing corresponding parts to classes where they belong for the given Java code: Class 1:Vehicleclass Class 2:Carclass Class 3:Boatclass Class 4:Bikeclass.
The Java Code is
Class 1:Vehicleclass Vehicle{protected int number of wheels; protected String sound, make; public int countWheels(){return number of wheels;}public String move(){return sound;}public String get make (){return make;}}
Class 2:Carclass Car extends Vehicle{private int year;public Car(int year,String make){this.year=year;numberOfWheels = 4;super.sound="vroom vroom";super.make=make;}public String move(){return super.move();}public String getmake(){return super.getmake() + " is a make of car";}public String toString(){return year + " "+ this.getmake();}}
Class 3:Boatclass Boat extends Vehicle{private int numberOfSeats;public Boat(int numSeats,String make){numberOfSeats=numSeats;super.make=make;super.sound="sploosh splash";super.numberOfWheels=0;}public String move(){return super.move();}public String getmake(){return super.getmake() + " is a make of boat";}public String toString(){return this.getmake() + " with "+ numberOfSeats+" seats";}}
Class 4:Bikeclass Bike extends Vehicle{private int totalDistance;public Bike(int tot, String make){totalDistance=tot;super.make=make;super.numberOfWheels=2;super.sound="RrrrrRrrrRRrrrrrrr";}public String move(){return super.move();}public String getmake(){return super.getmake() + " is a make of bike";}public String toString(){return this.getmake() + " which has travelled "+totalDistance+" kilometers";}}
Note: In this code, the class Vehicle is the parent class and the Car, Boat, and Bike classes are child classes that inherit the properties of the parent class.
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key stretching is a mechanism that takes what would be weak keys and stretches them to make the system more secure against ma in the middle attacks.
Key stretching is a technique used in cryptography to make a possibly weak key, such as password or passphrase, more secure against a brute-force attack by increasing the resources it takes to test each possible key.
Passwords or passphrases created by humans are often short or predictable enough to allow password cracking, and key stretching is intended to make such attacks more difficult by complicating a basic step of trying a single password candidate. Key stretching techniques generally work by feeding the initial key into an algorithm that outputs an enhanced key. The enhanced key should be of sufficient size to make it infeasible to break by brute force (e.g. at least 128 bits). The overall algorithm used should be secure in the sense that there should be no known way of taking a shortcut that would make it possible to calculate the enhanced key with less processor work than by using the key stretching algorithm itself.
Key stretching techniques provide significant protection against offline password attacks, such as brute force attacks and rainbow table attacks. Bcrypt and PBKDF2 are key stretching techniques that help prevent brute force and rainbow table attacks. Bcrypt is a key stretching technique designed to protect against brute force attempts and is the best choice of the given answers. Another alternative is Password-Based Key Derivation Function 2 (PBKDF2). Both salt the password with additional bits. Passwords stored using Secure Hash Algorithm (SHA) only are easier to crack because they don’t use salts.
In summary, key stretching is a mechanism used in cryptography to convert short keys into longer keys, making it more difficult for attackers to crack passwords or passphrases. It is a technique used to increase the strength of stored passwords and prevent the success of some password attacks such as brute force attacks and rainbow table attacks. Key stretching techniques generally work by feeding the initial key into an algorithm that outputs an enhanced key, which should be of sufficient size to make it infeasible to break by brute force. Bcrypt and PBKDF2 are key stretching techniques that help prevent brute force and rainbow table attacks.
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What is an information system? 2. Explain Computer-based information systems 3. Differentiate between Electronic and Mobile Commerce
An Information System (IS) can be defined as a system that includes the collection, storage, analysis, and distribution of information. Computer-Based Information SystemComputer-based Information Systems (CBIS) are those information systems that rely on the use of computers and technology for their operation.
Computer-Based Information SystemComputer-based Information Systems (CBIS) are those information systems that rely on the use of computers and technology for their operation.
They rely on databases, software applications, and networking for storing, processing, and distributing information. They help organizations in making decisions, providing information, and communicating with other organizations.
Difference between Electronic and Mobile CommerceElectronic Commerce (e-commerce) refers to the buying and selling of goods and services over the internet. E-commerce transactions can be conducted using various technologies such as email, online catalogs, shopping carts, and payment gateways.
Mobile Commerce (m-commerce) refers to the buying and selling of goods and services using mobile devices such as smartphones, tablets, and other portable devices. M-commerce transactions can be conducted using mobile applications or mobile browsers.
In conclusion, Information Systems (IS) are systems that are used to collect, store, analyze, and distribute information. Computer-Based Information Systems (CBIS) rely on computers and technology for their operation, while Electronic Commerce (e-commerce) refers to the buying and selling of goods and services over the internet, and Mobile Commerce (m-commerce) refers to the buying and selling of goods and services using mobile devices such as smartphones, tablets, and other portable devices.
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