Consider the relational schema below: Students(sid: integer, sname: string, major: string) Courses(cid: integer, cname: string, hours: integer) Enrollment(sid: integer, cid: integer, grade: real) Write a relational algebra expression that satisfies this query? Find the distinct names of all students that take at least three courses and major in "Philosophy".
Solution :
Here, we need to perform JOIN operation of the students and registration.
Use NATURAL JOIN operator [tex]\Join[/tex] and so no need to specify Join condition.
Also we need to selection operator tp select only those course whose major in "philosophy".
Finally we projection operator π to project only distinct students name who took at least three courses.
[tex]$\pi [\sigma_{\text{student's nam}e} [ \sigma(\text{three courses}) \Join \text{"Philosophy"}]]$[/tex]
What unit of measurement is used for DIMM read and write times?
Answer:
Nanosecond
Explanation:
Nanosecond is used for measuring DIMM read and write times.
10. Question
What are the drawbacks of purchasing something online? Check all that apply.
Explanation:
1) the quality of purchased good may be low
2) there might me fraud and cheaters
3) it might be risky
4) we may not get our orders on time
There are many drawbacks of purchasing online, some of them are as follows,
Chance of pirated item in place of genuine product.Chances of fraud during digital purchase and transaction.Product not deliver on time as expected.Not getting chance to feel the product before purchase.These are some of the drawbacks of purchasing something online.
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Chất xơ có nhiều trong thực phẩm nào?
Answer: rau củ quả đều có lượng chất xơ nhiều hơn so với các loại thực phẩn khác
Explanation:
slide transition can be defined as ____ of one slide after another
Answer:
visual effect
Explanation:
A slide transition is the visual effect that occurs when you move from one slide to the next during a presentation. You can control the speed, add sound, and customize the look of transition effects.
you get a call from a customer who says she can't access your site with her username and password. both are case-sensitive and you have verified she is entering what she remembers to be her user and password correctly. what should you do to resolve this problem?
a. have the customer clear her browser history and retry
b. look up her username and password, and inform her of the correct information over the phone
c. have the user reboot her system and attempt to enter her password again
d. reset the password and have her check her email account to verify she has the information
Answer:
answer would be D. I do customer service and would never give information over the phone always give a solution
In order to resolve this problem correctly, you should: D. reset the password and have her check her email account to verify she has the information.
Cybersecurity can be defined as a group of preventive practice that are adopted for the protection of computers, software applications (programs), servers, networks, and data from unauthorized access, attack, potential theft, or damage, through the use of the following;
Processes.A body of technology.Policies.Network engineers.Frameworks.For web assistance, the security standard and policy which must be adopted to enhance data integrity, secure (protect) data and mitigate any unauthorized access or usage of a user's sensitive information such as username and password, by a hacker, is to ensure the information is shared discreetly with the user but not over the phone (call).
In this context, the most appropriate thing to do would be resetting the password and have the customer check her email account to verify she has the information.
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Which type of research source lets a technical writer observe how a product works?
Answer:
Research to Support Your Technical Communication
As a buyer for a clothing retailer, for example, you might need to conduct research to help you determine whether a new line of products would be successful in your store. As a civil engineer, you might need to perform research to determine whether to replace your company's current surveying equipment with 3D-equipped stations. And as a pharmacist, you might need to research whether a prescribed medication might have a harmful interaction with another medication a patient is already taking
Explanation:
Hope it helps
Please mark as brainliest
Which of the following is an example of a long-term goal?Developing a lifetime savings plan
Answer:
Retirement fund/plan ?
Explanation:
Write a method, including the method header, that will receive an array of integers and will return the average of all the integers. Be sure to use the return statement as the last statement in the method. A method that receives an array as a parameter should define the data type and the name of the array with brackets, but not indicate the size of the array in the parameter. A method that returns the average value should have double as the return type, and not void. For example: public static returnType methodName(dataType arrayName[]) 3 The array being passed as a parameter to the method will have 10 integer numbers, ranging from 1 to 50. The average, avgNum, should be both printed in the method, and then returned by the method. To print a double with 2 decimal points precision, so use the following code to format the output: System.out.printf("The average of all 10 numbers is %.2f\n", avgNum);
Answer:
The method is as follows:
public static double average(int [] arrs){
double sum = 0,avgNum;
for(int i = 0;i<arrs.length;i++){
sum+=arrs[i];
}
avgNum = sum/arrs.length;
System.out.printf("The average of all numbers is %.2f\n", avgNum);
return avgNum;
}
Explanation:
This defines the method
public static double average(int [] arrs){
This declares sum and avgNum as double; sum is then initialized to 0
double sum = 0,avgNum;
This iterates through the array
for(int i = 0;i<arrs.length;i++){
This adds up the array elements
sum+=arrs[i]; }
This calculates the average
avgNum = sum/arrs.length;
This prints the average to 2 decimal places
System.out.printf("The average of all numbers is %.2f\n",
avgNum);
This returns the average to main
return avgNum; }
Write a program that prompts the user to enter a positive integer and displays all its smallest factors in decreasing order.
Answer:
<fact>[ZRjKt9sw6V(gh6E)ehNM3]<zip>
Explanation:
The menu bar display information about your connection process, notifies you when you connect to another website, and identifies the percentage information transferred from the Website server to your browser true or false
Answer:
false
Explanation:
My teacher quized me on this
In the welding operations of a bicycle manufacturer, a bike frame has a long flow time. The set up for the bike frame is a 7 hour long operation. After the setup, the processing takes 6 hour(s). Finally, the bike frame waits in a storage space for 7 hours before sold. Determine the value-added percentage of the flow time for this bike frame. Round your answer to the nearest whole number for percentage and do NOT include the "%" sign in the answer. For example, if your answer is 17.7%, please answer 18. If your answer is 17.4%, please answer 17. No "%" sign. No letter. No symbols. No explanation. Just an integer number.
Answer:
Bike Frame Flow Time
The value-added percentage of the flow time for this bike frame is:
= 46.
Explanation:
a) Data and Calculations:
Bike Frame Flow Time:
Setup time = 7 hours
Processing time = 6 hours
Storage time = 7 hours
Flow time of the bike frame = 13 hours (7 + 6)
Value-added percentage of the flow time for this bike frame = 6/13 * 100
= 46%
b) Flow time represents the amount of time a bicycle frame spends in the manufacturing process from setup to end. It is called the total processing time. Unless there is one path through the process, the flow time equals the length of the longest process path. The storage time is not included in the flow time since it is not a manufacturing process.
Which of the following are advantages of a local area network, as opposed to a wide area network? Select 3 options.
provides access to more networks
higher speeds
more secure
lower cost
greater geographic reach
Answer:
✅ more secure
✅ lower cost
✅ higher speeds
Explanation:
Edge 2022
you are the network administrator for a college. wireless access is widely used at the college. you want the most secure wireless connections you can have. which of the following would you use?
A WPA
B WEP2
CWEP
D WPA2
Answer:
D. WPA2
Explanation:
Required
Of the 4 options, which is the most secured?
WPA was created as a solution to the vulnerabilities in WEP/WEP2. Then, WPA was upgraded to WPA2.
WPA2 is the least vulnerable to hacks because for every user that is connected to the network through WPA2, a unique encryption is made available for such connection.
Hence, the most secure connection, of the 4 is WPA2.
kỹ năng học tập ở bậc đại học là gì
Answer:
please translate
Thank you ✌️
Create union floatingPoint with members float f, double d and long double x. Write a program that inputs values of type float, double and long double and stores the values in union variables of type union floatingPoint. Each union variable should be printed as a float, a double and a long double. Do the values always print correcly? Note The long double result will vary depending on the system (Windows, Linux, MAC) you use. So do not be concern if you are not getting the correct answer. Input must be same for all cases for comparison Enter data for type float:234.567 Breakdown of the element in the union float 234.567001 double 0.00000O long double 0.G0OO00 Breaklo n 1n heX float e000000O double 436a9127 long double 22fde0 Enter data for type double :234.567 Breakdown of the element in the union float -788598326743269380.00OGOO double 234.567000 long double 0.G00000 Breakolon 1n heX float 0 double dd2f1aa0 long double 22fde0 Enter data for type long double:
Answer:
Here the code is given as follows,
#include <stdio.h>
#include <stdlib.h>
union floatingPoint {
float floatNum;
double doubleNum;
long double longDoubleNum;
};
int main() {
union floatingPoint f;
printf("Enter data for type float: ");
scanf("%f", &f.floatNum);
printf("\nfloat %f ", f.floatNum);
printf("\ndouble %f ", f.doubleNum);
printf("\nlong double %Lf ", f.longDoubleNum);
printf("\n\nBreakdown in Hex");
printf("\nfloat in hex %x ", f.floatNum);
printf("\ndouble in hex %x ", f.doubleNum);
printf("\nlong double in hex %Lx ", f.longDoubleNum);
printf("\n\nEnter data for type double: ");
scanf("%lf", &f.doubleNum);
printf("float %f ", f.floatNum);
printf("\ndouble %f ", f.doubleNum);
printf("\nlong double %Lf ", f.longDoubleNum);
printf("\n\nBreakdown in Hex");
printf("\nfloat in hex %x ", f.floatNum);
printf("\ndouble in hex %x ", f.doubleNum);
printf("\nlong double in hex %Lx ", f.longDoubleNum);
printf("\n\nEnter data for type long double: ");
scanf("%Lf", &f.longDoubleNum);
printf("float %f ", f.floatNum);
printf("\ndouble %f ", f.doubleNum);
printf("\nlong double %Lf ", f.longDoubleNum);
printf("\n\nBreakdown in Hex");
printf("\nfloat in hex %x ", f.floatNum);
printf("\ndouble in hex %x ", f.doubleNum);
printf("\nlong double in hex %Lx ", f.longDoubleNum);
return 0;
}
hi, solution, help me please.
Answer:
5hujjibjjjjjnNkzkskskwjejekekdkdkeeioee9
Answer:
is it infinity ? let me know
Using Java:
Background
Markdownis a formatting syntax used by many documents (these instructions, for example!) because of it's plain-text simplicity and it's ability to be translated directly into HTML.
Task
Let's write a simple markdown parser function that will take in a single line of markdown and be translated into the appropriate HTML. To keep it simple, we'll support only one feature of markdown in atx syntax: headers.
Headers are designated by (1-6) hashes followed by a space, followed by text. The number of hashes determines the header level of the HTML output.
Examples
# Header will become Header
## Header will become
how do you format a cd or a DVD
After reading the background, please work on the following problem: a. The source process reads information from a file (Therefore, you need to prepare a small text file for testing purpose). b. The source process calls fork() to create the filter process. c. The filter process reads information from the source process (passed via an anonymous pipe), converts the uppercase characters to lowercase ones and vice versa, and then prints out the converted characters to the screen.
Answer:
Explanation:
The following code is written in Java. It has the main method (source process) and a function called fork() which contains the filter process as described in the question. fork() takes in the file information as a parameter and prints out the information to the screen. The test can be seen with the output in the attached image below.
import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
class Brainly {
public static void main(String[] args) {
String data = "";
try {
File myObj = new File("C:\\Users\\Gabriel2\\AppData\\Roaming\\JetBrains\\IdeaIC2020.2\\scratches\\input.txt"); //USE YOUR FILE LOCATION
Scanner myReader = new Scanner(myObj);
while (myReader.hasNextLine()) {
data += myReader.nextLine();
data += "\n";
}
myReader.close();
} catch (FileNotFoundException e) {
System.out.println("An error occurred.");
e.printStackTrace();
}
System.out.println("Original: \n" + data);
fork(data);
}
public static void fork(String data) {
String output = "";
for (int i = 0; i < data.length(); i++) {
if (Character.isUpperCase(data.charAt(i)) == true) {
output += Character.toLowerCase(data.charAt(i));
} else if (Character.isLowerCase(data.charAt(i)) == true) {
output += Character.toUpperCase(data.charAt(i));
} else {
output += data.charAt(i);
}
}
System.out.println("Modified: \n" + output );
}
}
why SSTF disk scheduling is not practically feasible?
Answer:
There is a lack of predictability because of the high variance of response time. Additionally, SSTF may cause starvation of some requests. Starvation is possible for some requests as it favors easy to reach requests and ignores the far-away processes.
SSTF disk scheduling is not practically feasible because it makes an external call and is forced to wait for I/O to complete, thereby giving up its first-place position.
What is SSTF disk scheduling?Shortest Seek Time First (SSTF) is a disc scheduling algorithm that is abbreviated as SSTF. Before moving the head away to service other requests, it selects the request that is closest to the current head location.
Because of the high variance in response time, there is a lack of predictability. Furthermore, SSTF may cause some requests to be denied. Some requests may experience starvation because the system prioritizes nearby requests and overlooks distant operations.
Therefore, because it makes an external call and is obliged to wait for I/O to complete, SSTF disc scheduling is not viable because it loses its first-place status.
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which technique is the best to help you manage time better
Answer:
Make a schedule and select certain times to do certain things so that you could have time for more things.
Explanation:
I did the same thing now I can make time for myself.
Ann, a customer, purchased a pedometer and created an account or the manufacturer's website to keep track of her progress. Which of the following technologies will Ann MOST likely use to connect the pedometer to her desktop to transfer her information to the website?
a. Bluetooth
b. Infared
c. NFC
d. Tethering
Answer:
The technologies that Ann will MOST likely use to connect the pedometer to her desktop to transfer her information to the website are:
a. Bluetooth
and
c. NFC
Explanation:
Bluetooth and NFC (Near Field Communication) are wireless technologies that enable the exchange of data between different devices. Bluetooth operates on wavelength. NFC operates on high frequency. The security of NFC over Bluetooth makes it a better tool of choice. NFC also operates on a shorter range than Bluetooth, enabling a more stable connection. NFC also enjoys a shorter set-up time than Bluetooth. It also functions better than Bluetooth in crowded areas. Tethering requires the use of physical connectors. Infrared is not a connecting technology but wave radiation.
The tax calculator program of the case study outputs a floating-point number that might show more than two digits of precision. Use the round function to modify the program to display at most two digits of precision in the output number.
Answer:
Explanation:
The following code is written in Python. The tax calculator program was not provided, therefore I created a tax calculator that takes in the total price as an input and adds a 7% tax to it. Then it uses the round() function to make sure that the total is outputted as a decimal with two decimal digits at most.
def taxCalculator(price):
total = price * 1.07
formattedTotal = round(total, 2)
return formattedTotal
Consider the following JavaScript code fragment:var greeting = function ( name ) {console.log ( name )}The best answer for what is wrong with this code is:Group of answer choices
Answer:
name is a reserved word in JS and cannot be used as an identifier
Explanation:
From the group of answer choices provided the only one that may be a problem would be using the word name as a parameter. Although name is not a reserved word per say in JS it is in HTML, and since JS targets HTML it could cause some errors. This however does not prevent this code from running correctly. JS does not require semicolons anymore, and the opening and closing braces for a body of code does not need to be on their own lines. Also, variable names are not Strings and do not need to be inside quotes, even for console.log()
How does Accenture view automation?
Answer:
The description of the given question is summarized below.
Explanation:
These organizations retrained, retooled, and empowered our employees amongst all organization's internal management operating areas throughout order to create an increased automation attitude.Accenture's Innovative Software department was indeed adopting a concept called Human Plus technology, which includes this type of training.Brooke is trying to save enough money in the next year to purchase a plane ticket to Australia. Every month Brooke saves $200. Write a for loop that displays how much money Brooke will save at the end of each month for the next 12 months.
Answer:
var monthlyDeposit = 200;
var accountBalance = 0;
for(var i = 0;i<12;i++){
accountBalance += monthlyDeposit;
console.log(accountBalance);
}
Write a program whose input is a character and a string, and whose output indicates the number of times the character appears in the string. The output should include the input character and use the plural form, n's, if the number of times the characters appears is not exactly 1. Ex: If the input is: n Monday the output is: 1 n Ex: If the input is: z Today is Monday the output is: 0 z's Ex: If the input is: n It's a sunny day the output is: 2 n's Case matters. Ex: If the input is: n Nobody the output is: 0 n's n is different than N.
Answer:
The program in Python is as follows:
char = input("Character: ")[0]
string = input("String: ")
kount = string.count(char)
print(kount,char,end="")
if kount!=1:
print("'s")
Explanation:
This gets character input
char = input("Character: ")[0]
This gets string input
string = input("String: ")
This counts the occurrence of char in string
kount = string.count(char)
This prints the number of occurrence and the character
print(kount,char,end="")
This prints 's, if kount is other than 1
if kount!=1:
print("'s")
Queues can be represented using linear arrays and have the variable REAR that point to the position from where insertions can be done. Suppose the size of the array is 20, REAR=5. What is the value of the REAR after adding three elements to the queue?
Answer:
8
Explanation:
Queues can be implemented using linear arrays; such that when items are added or removed from the queue, the queue repositions its front and rear elements.
The value of the REAR after adding 3 elements is 5
Given that:
[tex]REAR = 5[/tex] --- the rear value
[tex]n = 20[/tex] --- size of array
[tex]Elements = 3[/tex] --- number of elements to be added
When 3 elements are added, the position of the REAR element will move 3 elements backward.
However, the value of the REAR element will remain unchanged because the new elements that are added will only change the positioning of the REAR element and not the value of the REAR element.
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Feiya has several computing devices around the home that are connected to the Internet:
A smart home assistant (connected via wireless)
A laptop computer (connected via wireless)
A desktop computer (connected via Ethernet)
Which of her devices use the Internet Protocol (IP) when sending data through the Internet?
Answer:
roaming
bluetooth
Explanation:
its right
The device that use the Internet Protocol (IP) when sending data through the Internet is every device she is using.
What is internet protocol?The Internet Protocol (IP) is a protocol, or set of rules, that is used to route and address data packets so that they can travel across networks and arrive at their intended destination.
Data traveling across the Internet is split up into smaller slices known as packets.
Essentially, it enables linked gadgets to interact with one another despite differences in internal processes, structure, or design.
Network protocols enable easy communication with people all over the world and thus play an important role in modern digital communications.
The Internet can be accessed by a wide range of computing devices. To send data over the Internet, all devices must use the Internet Protocol.
Thus, all the given device will use the Internet Protocol (IP) when sending data through the Internet.
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