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Elina [12.6K]
2 years ago
9

Arrange the computers in the order fastest to slowest: Minicomputer, Supercomputer, Personal Computer and Mainframe.

Computers and Technology
1 answer:
Likurg_2 [28]2 years ago
6 0

Answer:

supercomputer, mainframe, personal computer, minicomputer

Explanation:

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To save a new copy of an existing database, a user can open the original database and select ________ from the file tab.
Yuri [45]
And select copy from the file tab.
6 0
3 years ago
I need to create a method named "root positive". which will either print the square root of the number passed to it or if the nu
rjkz [21]

Answer:

Explanation:

The following code is written in Java. It is a method that calculates the square root of a number as requested. The method first checks with an IF statement if the parameter value is a positive number and then calculates the square root and prints it to the screen. Otherwise, it prints Number must not be negative. A test case has been provided in the main method and the output can be seen in the attached image below.

import java.util.Scanner;

class Brainly {

   public static void main(String[] args) {

       Scanner in = new Scanner(System.in);

       System.out.print("Enter a number of type double to calculate square root:");

       double num = in.nextDouble();

       rootPositive(num);

   }

   public static void rootPositive(double num) {

       if (num > 0) {

           System.out.println(Math.sqrt(num));

       } else {

           System.out.println("Number must not be negative.");

       }

   }

}

5 0
3 years ago
write a program that keeps names and email addresses in a dictionary as key-value pairs. the program should display a menu that
erma4kov [3.2K]

To write a program that keeps names and email addresses in a dictionary as key-value pairs check the code given below.

<h3>What is key-value pairs?</h3>

In a key-value pair, two related data elements are combined: a value, which is a variable that belongs to the set (for example, male/female, green, 100), and a key, which is a constant that defines the data set (for example, gender, color, price).

A key-value pair could look something like this when fully formed:

gender = male

color = green

price > 100

↓↓↓//<u>Python code</u>//↓↓↓

import pickle

import sys

try:

   f=open('email.dat','rb')

   d=pickle.load(f)  

   f.close()

     

except:    

   d={}

while True:

   print('\n1. Find a email address')

   print('2. Add name and email address')

   print('3. Change an email address')

   print('4. Delete an email address')

   print('5. Exit\n')

   choice=input('\nEnter a choice: ')

   if choice:

       choice=int(choice)

   else:

       print('\nEnter a number')

       continue    

   if choice == 1:

       while True:

           name=input('\nEnter the name ')

           if name:

               if name in d:

                   print('\n%s is the email id of %s \n' % (d[name],name))

                   break

               else:

                   print('\n Email not found \n')

                   break

           else:

               print('\nName cannot be empty\n')

               continue

           

   elif choice==2:

       while True:            

       

           name=input('\nEnter the name ')

           if name:

               break;

           else:

               print('\nName cannot be empty \n')

               continue

       while True:            

       

           email=input('\nEnter the email address ')

           if email:

               d[name]=email

               break

           else:

               print('\nEmail cannot be empty\n')

               continue

           

   elif choice==3:

       while True:            

       

           name=input('\nEnter the name to change the email address ')

           if name:

               if name in d:

                   email=input('\nEnter the new email address ')

                   d[name]=email

                   print('\nEmail address changed \n')

                   break;

               else:

                   print('\nName not found \n')

                   break

           else:

               print('\nName cannot be empty \n')

               continue

           

   elif choice == 4:

       while True:            

       

           name=input('\nEnter the name to remove ')

           if name:

               if name in d:

                   del d[name]

                   print('\nName and Email address removed \n ')

                   break;

               else:

                   print('\nName not found \n')

                   break

           else:

               print('\nName cannot be empty\n')

               continue

   elif choice == 5:

       

       f=open('email.dat','wb')

       pickle.dump(d,f)

       f.close()

       sys.exit()

   else:

       print('\nEnter a valid choice ')    

Learn more about key-value pair

brainly.com/question/29414672

#SPJ1

3 0
1 year ago
Select the correct answer.
Umnica [9.8K]

Answer:

OB. by zooming in on them

hope it helps

7 0
2 years ago
What command can you use if you accidentally delete a sentence in your document?
damaskus [11]

Answer:

undo

Explanation:

or ctrl z

hope this helps

6 0
3 years ago
Read 2 more answers
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