1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
elena55 [62]
3 years ago
15

List the various cases where use of a NULL value would be appropriate.

Computers and Technology
1 answer:
melomori [17]3 years ago
4 0

Answer:

The answer is below

Explanation:

There are cases where the use of a NULL value would be appropriate in a computer programming situation. These cases can be summarily described below:

The first case is in a situation where the value of the attribute of a certain element is known to exist, but the value can not be found

The second case is in a situation where the value of the attribute of a certain element is not known whether it exists or not.

You might be interested in
Which of the following statements best compares and contrasts the role of story writers and script writers
Citrus2011 [14]

Answer:

Both script and story writers must use the elements of plot to develop their work; however, script writers must also include the use of stage and camera descriptions.

Explanation:

7 0
3 years ago
Load the titanic sample dataset from the Seaborn library into Python using a Pandas dataframe, and visualize the dataset. Create
UNO [17]

Answer:

Following is given the data as required.

The images for histograms for age and gender are also attached below.

I hope it will help you!

Explanation:

8 0
3 years ago
(Drag each tile to the correct box)While surfing online, Patricia first checks her email and reads the latest messages. She then
Marizza181 [45]

Answer:

When Patricia checks her email use:

POP3

TCP

IP

When Patricia brows a website and log in to post a comment use:

HTTP

TCP

IP

LDAP

Explanation:

Email protocol

Patricia starts to check her email, the email application uses the protocol POP3.

The protocol TCP makes a connection with the server and transport the data.

Patricia receives her emails with the protocol IP on her computer.

Website protocol

Patricia started to surf and the protocol HTTP makes a connection with the internet.

The protocol TCP makes a connection with the server and transport the data.

With the protocol IP, she receives the website data.

With the protocol LDAP, Patricia makes a login to post the comment.

6 0
3 years ago
What is looping in QBASIC​
Elden [556K]

A looping is a set of instructions which is repeated a certain number of times until a condition is met. hlo dai k xa halkhabar

3 0
3 years ago
(Palindrome integer) Write the methods with the following headers // Return the reversal of an integer, i.e., reverse(456) retur
Debora [2.8K]

Answer:

import java.util.Scanner;

public class PalindromeInteger {

public static void main(String[] args) {

 // Create an object of the Scanner class to allow for user's inputs

 Scanner input = new Scanner(System.in);

 // Create a prompt to display the aim of the program.

 System.out.println("Program to check whether or not a number is a palindrome");

 // Prompt the user to enter an integer number.

 System.out.println("Please enter an integer : ");

 // Receive user's input and store in an int variable, number.

 int number = input.nextInt();

 // Then, call the isPalindrome() method to check if or not the

 // number is a  palindrome integer.

 // Display the necessary output.

 if (isPalindrome(number)) {

  System.out.println(number + " is a palindrome integer");

 }

 else {

  System.out.println(number + " is a not a palindrome integer");

 }

}

// Method to return the reversal of an integer.

// It receives the integer as a parameter.

public static int reverse(int num) {

 // First convert the number into a string as follows:

 // Concatenate it with an empty quote.

 // Store the result in a String variable, str.

 String str = "" + num;

 // Create and initialize a String variable to hold the reversal of the  

 // string str. i.e rev_str

 String rev_str = "";

 // Create a loop to cycle through each character in the string str,

 // beginning at  the last character down to the first character.

 // At every cycle, append the character to the rev_str variable.

 // At the end of the loop, rev_str will contain the reversed of str

 for (int i = str.length() - 1; i >= 0; i--) {

  rev_str += str.charAt(i);

 }

 // Convert the rev_str to an integer using the Integer.parseInt()

 // method.  Store the result in an integer variable reversed_num.

 int reversed_num = Integer.parseInt(rev_str);

 // Return the reversed_num

 return reversed_num;

}

// Method to check whether or not a number is a palindrome integer.

// It takes in the number as parameter and returns a true or false.

// A number is a palindrome integer if reversing the number does not

//  change the  number itself.

public static boolean isPalindrome(int number) {

 // check if the number is the same as its reversal by calling the

 //reverse()  method declared earlier. Return true if yes, otherwise,

               // return false.

 if (number == reverse(number)) {

  return true;

 }

 return false;

}

}

Explanation:

The source code file for the program has also been attached to this response for readability. Please download the file and go through the comments in the code carefully as it explains every segment of the code.

Hope this helps!

Download java
7 0
3 years ago
Other questions:
  • What are all the folders located on the DOCK called?
    11·1 answer
  • You need to find out how much ram is installed in a system. what command do you execute to launch the system information utility
    12·1 answer
  • On a Windows network share, if the user can add, edit, and delete files and folders within the LabFiles folder, what type of acc
    14·1 answer
  • In the view that follows, which field can't be updated create view example_2 as select invoice_number, invoice_date, invoice_tot
    13·1 answer
  • Write the definition of a function named averager that receives a double parameter and returns-- as a double -- the average valu
    11·1 answer
  • Write a function called intersect with four float parameter
    11·1 answer
  • Jackie created a poster for a rock band. Which file format will best preserve the graphics? 20PTS​
    14·2 answers
  • Difference between electrical and electronic devices
    15·2 answers
  • Use the drop-down menus to describe the customize ribbon dialog box.
    11·1 answer
  • If you're connected to a switch and your NIC is in promiscuous mode, what traffic would you be able to capture
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!