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Furkat [3]
3 years ago
9

Steve left his computer switched on in his room and went out to have breakfast. When he returned, he saw that the monitor had be

come blank while the system unit was still running. What is the first step that he needs to take to turn on the monitor?
A.
Check the keyboard and mouse connections
B.
Move the mouse or press a key on the keyboard
C.
Clean the dust from the system unit fan
D.
Install antivirus software
Computers and Technology
1 answer:
yanalaym [24]3 years ago
5 0

Answer:

B

Explanation:

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There are two String variables, s1 and s2, that have already been declared and initialized. Write some code that exchanges their
Ivan

Answer:

//here is code in java.

import java.util.*;

class Solution

{

// main method of class

public static void main (String[] args) throws java.lang.Exception

{

   try{

    // declare an initialize first string variables

     String st1="hello";

     // declare an initialize first string variables

     String st2="world";

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    st3=st1;

    st1=st2;

    st2=st3;

    System.out.println("value of first String after exchange: "+st1);

    System.out.println("value of second String after exchange: "+st2);

   }catch(Exception ex){

       return;}

}

}

Explanation:

declare and initialize two string variables.Create another string variable "st3". first assign value of "st1" to "st3" after then value of "st2" to "st1" and then  assign value of "st3" to "st2". This will exchange the values of both the string.

Output:

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Answer:

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