Answer:e
Explanation: Encapsulation is one of the four fundamental OOP concepts. The other three are inheritance, polymorphism, and abstraction. The other three are inheritance, polymorphism, and abstraction. Encapsulation in Java is a mechanism of wrapping the data (variables) and code acting on the data (methods) together as a single unit
A(n) _____ website gathers, organizes, and then distributes web content.
Answer:
content aggregator
Explanation:
:)
2. Which of the following is a
Web 2.0 programming
methodology you could use to
create Web pages that are
dynamic and interactive without
the need to refresh or
reload the page?
a. Wiki
b. RSS
c. Blog
d. Ajax
Answer:ajax
Explanation:
1) Create the following 2D array in one instruction: {{1,2,3,4,5}, {1,2,3,4,5}, {1,2,3,4,5}} // your code goes below:
2) Create the above 2D array using a for loop and the below method: public static int[] simpleArray(int n) { int[] result = new int[n]; for (int i=0; i
Answer:
1)
int[][] a2dArray = {{1,2,3,4,5},{1,2,3,4,5},{1,2,3,4,5}};
2)
public class Main
{
public static void main(String[] args) {
int[][] a2dArray2 = new int[3][5];
for (int i=0; i<3; i++) {
a2dArray2[i] = simpleArray(5);
}
for (int i=0; i<a2dArray2.length; i++) {
for (int j=0; j<a2dArray2[i].length; j++){
System.out.print(a2dArray2[i][j] + "");
}
System.out.println();
}
}
public static int[] simpleArray(int n){
int[] result = new int[n];
for (int i=0; i<n; i++) {
result[i] = i+1;
}
return result;
}
}
Explanation:
1) To create a 2D array you need to write the type, two brackets and the name on the left hand side. Put the values on the right hand side.
2) Declare the array. Since there will be 3 rows and 5 columns, put these values in the brackets on the right hand side.
Create a for loop that iterates 3 times. Call the method simpleArray inside the loop so that each row of the a2dArray2 array will be set. Be aware that simpleArray method takes an integer as parameter and creates a 1D array, the numbers in the array starts from 1 and goes to the parameter value. That is why calling the method simpleArray (with parameter 5) 3 times will create a 2D array that has 3 rows and 5 columns.
Then, use a nested for loop to display the 2D array.
Read the following program requirements prior to completing the Hands-on. A retail company must file a monthly sales tax report listing the total sales for the month and the amount of state and county sales tax collected. The state sales tax rate is 4 percent and the county sales tax rate is 2 percent. Write a program that asks the user to enter the total sales for the month. The application should calculate and display the following: • The amount of county sales tax • The amount of state sales tax • The total sales tax (county plus state) Step 1: Write the steps the algorithm:
Answer:
state_sales_tax_rate = 0.04
county_sales_tax_rate = 0.02
sales = float(input("Enter the total sales for the month: "))
county_sales_tax = sales * county_sales_tax_rate
state_sales_tax = sales * state_sales_tax_rate
total_sales_tax = county_sales_tax + state_sales_tax
print("The amount of county sales tax is " + str(county_sales_tax))
print("The amount of state sales tax is " + str(state_sales_tax))
print("The total sales tax is " + str(total_sales_tax))
Explanation:
*The code is in Python.
Set the state_sales_tax_rate and county_sales_tax_rate
Ask the user to enter the sales
Calculate the county_sales_tax, multiply sales by county_sales_tax_rate
Calculate the state_sales_tax, multiply sales by state_sales_tax_rate
Calculate the total_sales_tax, sum county_sales_tax and state_sales_tax
Print the results
briefly summarize two examples of cybercrime stories.
quick pleaseeee
A cyber-crime is a crime that involves computers. For example, the computers could be breached, threaten someone, steal money, etc. Some examples of cyber-crime in real life include:
Former amazon employee breaches Capital One and steals private data.Visa Cards were able to be bypassed without contacts.ASCO received an attack that was ransomware.Best of Luck!
To return the value of the cell D8, the formula should be OFFSETA1=________.
Answer:
The formula is =OFFSET( A1, 7,3,1,1 )
Explanation:
Microsoft excel is a statistical and analytical tool for data management and analysis. Its working environment is called a worksheet. The worksheets are made up of rows and columns also known as records and fields respectively.
Functions like OFFSET in excel is used to return a cell or group of cells. It gets the position to turn by start getting a starting port, then the number of records below it and the fields after, then the length and width of cells to return.
syntax: =OFFSET( "starting cell", "number of rows below", "number of columns after", "height of cells to return", "width of cells to return" )
When visiting a museum Lian takes a photo of a painting with a smartphone which stores the photo as an image file. Which of the following best describes the differences between the painting itself and the photo of the painting stored on the smartphone? A. Both the painting and the photo are analog B. The photo is a digital representation of the analog painting C. Sampling can be used to determine whether the analog image is an accurate representation of the painting D. The phone can represent the photo in either digital or analog formats depending on the sampling technique that is used
The best statement that best describes the differences between the painting itself and the photo of the painting stored on the smartphone is that the photo is a digital representation of the analog painting.
For better Understanding, we have to know about analog and digital terms means
Analog simply means a way of giving out information by a regular but different signal. Digital simply means a way of storing or giving out information by discrete, non regular ways.The painting is the analog while the photo is the digital copy. the photo is a copy of the original and when you look at it, the photo is not giving continous signals like an analog.From the above, we can therefore say that the answer that the photo is a digital representation of the analog painting is true.
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Consider the definition in OCaml
let fabcd = a.(if b then c else d)
Which of the following must hold (zero, one or more answers can be correct)?
A. The type of a is int array.
B. The type of b is bool.
C. The type of c is int.
D. The type of d is int.
E. The return type of f is int.
Answer:
The type of b is bool ( B )
The type of c is int ( C )
The type of d is int ( D )
Explanation:
The options that must hold zero are: The type of b is bool,The type of d is int and The type of c is int.
If b is true then c or d is true because c and d are int. this is because b been a true/false means that d and c are boolean int. because d and c are assigned to integers
The statements that must hold are:
b. The type of b is bool c. The type of c is int d. The type of d is int
The definition is given as:
let fabcd = a.(if b then c else d)
From the above definition, we have the following if condition
if b then c else d
This means that:
Variable b can only take either true or false, as its value.
So, b is of Boolean type
Variables c and d can take any numerical data type such as int, floats, and any character type such as char and string.
This means that:
Options (c) and (d) can also hold.
Hence, the true options are: (b), (c) and (d)
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Write code to assign the number of characters in the string rv to a variable num_chars.
Answer:
rv = "hello"
num_chars = len(rv)
print(num_chars)
Explanation:
*The code is in Python.
Initialize the string rv, in this example I set it to "hello"
Use the len() method to get the number of characters in the rv and set it to the num_chars
Print the num_chars
Note that the result will be 5 in this case, because hello consists of five characters
Are scripted languages easier or more difficult to port than programming languages? Why?
Answer:
Scripting languages are easier to port to various platforms due to the compiling and interpreting tools it uses to read the source code.
Explanation:
Programming languages are used to create source codes for various applications from web programming to mobile application implementation.
A programming language can be a scripting language, only with the required tools like a compiler or an interpreter. For example, C source codes are compiled to executable scripting file with the GCC compiler and python codes are interpreted with the cpython interpreter.
Describe what each of the following functions in R do.1. t2. matplot3. c4. seq5. legend6. matrix7. rownames8. colnames9. type of
Answer:
1. t is a function used to transpose a matrix object. The object is passed as an argument to the function.
2. matplot is a graphical function in R used for data visualization.
3. The c function is used to combine arguments.
4. seq is an R function used to derive a range of numbers, optionally specifying a start, stop and step argument or simply a single numeric argument.
5. legends are used in data visualization to list and define items in the graphical presentation.
6. matrix is a function in R used to create and work with matrix and data frame objects.
7. rownames and colnames are functions used to label the row and columns of a data frame in R.
8. The typeof function return the data type of an object.
Explanation:
The R programming language is a dedicated programming language for data analysis and visualization.
Write a Java application that reads three integers from the user using a Scanner. Then, create separate functions to calculate the sum, product and average of the numbers, and displays them from main. (Use each functions' 'return' to return their respective values.) Use the following sample code as a guide.
Answer:
import java.util.Scanner;
public class Main
{
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.print("Enter a number: ");
int n1 = input.nextInt();
System.out.print("Enter a number: ");
int n2 = input.nextInt();
System.out.print("Enter a number: ");
int n3 = input.nextInt();
System.out.println("The sum is: " + calculateSum(n1, n2, n3));
System.out.println("The product is: " + calculateProduct(n1, n2, n3));
System.out.println("The average is: " + calculateAverage(n1, n2, n3));
}
public static int calculateSum(int n1, int n2, int n3){
return n1 + n2 + n3;
}
public static int calculateProduct(int n1, int n2, int n3){
return n1 * n2 * n3;
}
public static double calculateAverage(int n1, int n2, int n3){
return (n1 + n2 + n3) / 3.0;
}
}
Explanation:
In the main:
Ask the user to enter the numbers using Scanner
Call the functions with these three numbers and display results
In the calculateSum function, calculate and return the sum of the numbers
In the calculateProduct function, calculate and return the product of the numbers
In the calculateAverage function, calculate and return the average of the numbers
Create a cell reference in a format by typing in the cell name or
Answer:
D. Create a cell reference in a formula by typing in the cell name or clicking the cell.
Further Explanation:
To create a cell reference in a formula the following procedure is used:
First, click on the cell where you want to add formula.
After that, in the formula bar assign the equal (=) sign.
Now, you have two options to reference one or more cells. Select a cell or range of cells that you want to reference. You can color code the cell references and borders to make it easier to work with it. Here, you can expand the cell selection or corner of the border.
Again, now define the name by typing in the cell and press F3 key to select the paste name box.
Finally, create a reference in any formula by pressing Ctrl+Shift+Enter.
you have 2 matching hdds in a system, which you plan to configure as a RAID array to improve performance. Which RAID configuration should you use.
Answer:
I think
Explanation:
RAID 5 improves performance over RAID 1.
Explanation
RAID provides both fault tolerance and improved performance RAID (mirroring) provides only fault tolerance with no performance benefit. Both RAID 5 and RAID 1 can only sustain a loss of one disk in the set. Use multiple disk controllers to provide redundancy for the disk controller.
After analyzing the following code, which statement is not True:
import sqlite3
connection = sqlite3.connect("aquarium.db")
a. import sqlite3 gives our Python program access to the sqlite3 module.
b. The sqlite3.connect() function returns a Connection object
c. The aquarium.db file is created automatically by sqlite3.connect() if aquarium.db does not already exist on our computer.
d. A syntax error, if aquarium.db does not already exist on our computer.
Answer:
d. A syntax error, if aquarium.db does not already exist on our computer.
Explanation:
The SQLite database is a relational database used readily in python backend web frameworks to store and retrieve data. The python packages like the sqlite3 are extensions of python proving its flexibility and power as a multi-purpose programming language.
The sqlite3 package is first installed and imported in the python file and a sqlite connection is made to the database which is automatically saved in the aquarium.db file ( created if it doesn't already exist ).
3. List and explain FIVE (5) types of services performed by
operating system?
Two cars A and B leave an intersection at the same time. Car A travels west at an average speed of x miles per hour and car B travels south at an average speed of y miles per hour. Write a program that prompts the user to enter: The average speed of both the cars The elapsed time (in hours and minutes, separated by a space) Ex: For two hours and 30 minutes, 2 30 would be entered
Answer:
Here is the C++ program:
#include <iostream> // to use input output functions
#include <cmath> // to use math functions like sqrt()
#include <iomanip> //to use setprecision method
using namespace std; //to access objects like cin cout
int main () { //start of main function
double speedA; //double type variable to store average speed of car A
double speedB; //double type variable to store average speed of car B
int hour; //int type variable to hold hour part of elapsed time
int minutes; //int type variable to hold minutes part of elapsed time
double shortDistance; // double type variable to store the result of shortest distance between car A and B
double distanceA; //stores the distance of carA
double distanceB; //stores the distance of carB
double mins,hours; //used to convert the elapsed time
cout << "Enter average speed of car A: " << endl; //prompt user to enter the average speed of car A
cin >> speedA; //reads the input value of average speed of car A from user
cout << "Enter average speed of car B: " << endl ; //prompt user to enter the average speed of car B
cin >> speedB; //reads the input value of average speed of car A from user
cout << "Enter elapsed time (in hours and minutes, separated by a space): " << endl; //prompts user to enter elapsed time
cin>> hour >> minutes; //reads elapsed time in hours and minutes
mins = hour * 60; //computes the minutes using value of hour
hours = (minutes+mins)/60; //computes hours using minutes and mins
distanceA = speedA * (hours); // computes distance of car A
distanceB = speedB * (hours); //computes distance of car B
shortDistance =sqrt((distanceA * distanceA) + (distanceB * distanceB)); //computes shortest distance using formula √[(distanceA)² + (distanceB)²)]
cout << "The (shortest) distance between the cars is: "<<fixed<<setprecision(2)<<shortDistance;
//display the resultant value of shortDistance up to 2 decimal places
Explanation:
I will explain the program with an examples:
Let us suppose that the average speeds of cars are:
speedA = 70
speedB = 55
Elapsed time in hours and minutes:
hour = 2
minutes = 30
After taking these input values the program control moves to the statement:
mins = hour * 60;
This becomes
mins = 2 * 60
mins = 120
Next
hours = (minutes+mins)/60;
hours = (30 + 120) / 60
= 150/60
hours = 2.5
Now the next two statements compute distance of the cars:
distanceA = speedA * (hours);
this becomes
distanceA = 70 * (2.5)
distanceA = 175
distanceB = speedB * (hours);
distanceB = 55 * (2.5)
distanceB = 137.5
Next the shortest distance between car A and car B is computed:
shortDistance = sqrt((distanceA * distanceA) + (distanceB * distanceB));
shortDistance = sqrt((175 * 175) + (137.5 * 137.5))
= sqrt(30625 + 18906.25)
= sqrt(49531.25)
= 222.556173
shortDistance = 222.56
Hence the output is:
The (shortest) distance between the cars is: 222.56
Write a MATLAB function named lin_spaced_vector with two inputs and one return value. The first input will be a single real number representing a lower bound The second input will be a single real number representing an upper bound The return value must be a list of 200 numbers evenly spaced between the lower bound and the upper bound.
Explanation:
==================
lin_spaced_vector.m
==================
function out=lin_spaced_vector(in1,in2)%defining function
out=linspace(in1,in2,200);%200 spaced numbers between in1 and in2
end
===================
Executable File
===================
clear all%clears history
clc%clears screen
lin_spaced_vector(1,10)%calling function
clear all
clc
lin_spaced_vector(1,10)
what is the function of control unit? in computer.
regulates and integrates the operations of the computer. It selects and retrieves instructions from the main memory in proper sequence and interprets them
Write a program that converts a time in 12-hour format to 24-hour format. The program will prompt the user to enter a time in HH:MM:SS AM/PM form. (The time must be entered exactly in this format all on one line.) It will then convert the time to 24 hour form. You may use a string type to read in the entire time at once, including the space before AM/PM, or you may choose to use separate variables for the hours, minutes, seconds and AM/PM.
Answer:
This program is written in Python
inputtime = input("HH:MM:SS AM/PM: ")
splittime = inputtime.split(":")
secondAM = splittime[2].split()
if secondAM[1] == "AM":
print(splittime[0]+":"+splittime[1]+":"+secondAM[0])
elif secondAM[1] == "PM":
HH = int(splittime[0])
HH = HH + 12
print(str(HH)+":"+splittime[1]+":"+secondAM[0])
Explanation:
This line prompts user for input
inputtime = input("HH:MM:SS AM/PM: ")
This line splits the input string to HH, MM and "SS AM/PM"
splittime = inputtime.split(":")
This line splits "SS AM/PM" to SS and AM/PM
secondAM = splittime[2].split()
This line checks if time is AM
if secondAM[1] == "AM":
This line prints the equivalent time
print(splittime[0]+":"+splittime[1]+":"+secondAM[0])
Else;
elif secondAM[1] == "PM":
The equivalent 24 hour is calculated
HH = int(splittime[0]) + 12
This line prints the equivalent time
print(str(HH)+":"+splittime[1]+":"+secondAM[0])
Write a Java program to count the characters in each word in a given sentence?Examples:Input : geeks for geeksOutput :geeks->5for->3geeks->5
Answer:
import java.util.Scanner;
public class Main
{
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
System.out.print("Enter a sentence: ");
String sentence = in.nextLine();
String[] words = sentence.split("\\s");
for(String s : words)
System.out.println(s + " -> " + s.length());
}
}
Explanation:
Ask the user to enter a sentence
Get each word in the sentence using split method and put them in words array
Loop through the words. Print each word and number of characters they have using the length method in required format
What is the range of possible values for the variable x?
int x = (int)(Math.random() * 10);
Answer:
int number = (int)(Math. random() * 10); By multiplying the value by 10, the range of possible values becomes 0.0 <= number < 10.0
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How many different values can be stored in a byte?
Answer:
255
Explanation:
1 byte has 8 bits, that is, 8 combinations of binary inputs, which can result in calculations up to the number 2 ^ 8-1 = 255 (-1 because 0 will always be the first number), a computer nowadays has 64 bits (8bytes ), thus being able to calculate numbers up to 2 ^ 64-1, an integer file has 4 bytes, being able to calculate up to 2 ^ 32-1, and so on.
During the past decade ocean levels have been rising faster than in the past, an average of approximately 3.1 millimeters per year. Write a program that computes how much ocean levels are expected to rise during the next 15 years if they continue rising at this rate. Display the answer in both centimeters and inches.
Answer:
Program in Python is as follows:
rise = 3.1
for i in range(1,16):
print("Rise in Year "+str(i))
cm = rise * 0.1 * i
inch = rise/25.4 * i
print(str(cm)+" centimetres")
print(str(inch)+" inches")
Explanation:
This line initializes the rise of the ocean level
rise = 3.1
The following iterates from 1 to 15 (which stands for year)
for i in range(1,16):
print("Rise in Year "+str(i))
This calculates the rise in each year in centimetre
cm = rise * 0.1 * i
This calculates the rise in each year in inches
inch = rise/25.4 * i
The line prints calculated ocean rise in centimetres
print(str(cm)+" centimetres")
The line prints calculated ocean rise in inches
print(str(inch)+" inches")
Which WPA mode allows users to provide authentication via a pre-shared key or password?
Answer:
WPA2 allows users to provide authentication via a pre-shared network key / password
Explanation:
The WPA mode that allows users to provide authentication via a pre-shared key or password is the personal mode. The correct option is a.
What is WPA mode?The most recent and secure Wi-Fi protocol at the moment is WPA3 Personal. A pre-shared key is used by Personal WPA to verify users' first login information.
Wi-Fi security access All users on 2 pre-shared key (WPA-PSK) networks use the same passphrase. A security standard for computing devices using wireless internet connections is called Wi-Fi Protected Access (WPA).
It was created by the Wi-Fi Alliance to provide stronger user authentication and data encryption than the original Wi-Fi security standard, Wired Equivalent Privacy (WEP).
Therefore, the correct option is a. Personal mode.
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The question is incomplete. Your most probably complete question is given below:
a. Personal mode
b. Enterprise mode
c. Extensible Authentication Protocol mode
d. Wired Equivalent Privacy mode
Explain the basic method for implementing paging.
Answer:
The answer is below
Explanation:
In order to carry out the basic method for implementing paging, the following processes are involved:
1. Both physical and logical memories are broken into predetermined sizes of blocks otherwise known as FRAMES and PAGES respectively
2. During processing, Pages are loaded into the accessible free memory frames from the backing store. The backing store is however compartmentalized into predetermined sizes of blocks whose size is equal to the size of the memory frames
Where does the CPU store its computations?
A. Registers
B. External Data Bus
C. Binary
D. Processor
Answer: A. Registers
Explanation:
Option A is correct. The CPU stores its computations in the Registers
The CPU is known as the Central Processing Unit.
The CPU is useful in reading data and instructions from memory and then stores the results of what was computed in its main memory.This computation in the main memory is usually stored in the Register.Hence we can conclude that the CPU store its computations in the Register.
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What is one characteristic of a logic problem? A). a problem that can have three solutions B). a problem that can be solved in a methodical manner C). a problem that can have ill-defined steps D). a problem that can be solved using a chart
Answer:It can be solved in methodical manner
Explanation:
Because
The characteristic of a logic problem are, a problem that can be solved in a methodical manner. Option B is the correct option.
What is a logic problem?A logic problem is the type of logic puzzle or problem which is solved by the help of deduction technique.
Characteristic of a logic problem are listed below;
Logic problems can be solved in a methodical manner.Logic problems should be solved in a well specified steps.The puzzle of logic problems should be well-defined.Thus, the characteristic of a logic problem are, a problem that can be solved in a methodical manner. Option B is the correct option.
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Do AirPods Pro have a person say “Low battery” or did I buy fake AirPods?
Horizontal scaling of a client/server architecture means _____.
a. migrating the network to decentralized servers.
b. migrating the network to a faster communication media.
c. adding more proxy servers.
d. adding more workstations.
Answer:
D. I think
Explanation:
Horizontal scaling of a client/server architecture means adding more workstations. Thus the correct option is D.
What is client/server architecture?A computing model which places the majority of the services and features that the client requests on the server, which also hosts, delivers, and manages them are known as client-server architecture
Most applications that call for a division of labor between the client and the server benefit from the client-server architecture. The accessibility performance of applications is improved.
Both horizontal and vertical scaling is possible for client/server architectures. If a network is scaled vertically, more powerful, faster servers are added to the network, whereas horizontal scaling involves adding additional workstations (clients).
Therefore, option D is appropriate.
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