21. Which of these have highest precedence?

1. 1. *

   
   
   

   2. ++

   
   
   

   3. >>

   
   
   

   4. ()

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   Order of precedence is (highest to lowest) a -> b -> c -> d.

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22. What is the output of this program?
    

    
    public class Result 
    {
            public static void main(String args[]) 
            {    
                 int p,q,r,s;
                 p=q=r=s=10;
                p+=q-=r*=s/=10;
               System.out.println(p+" "+q+" "+r+" "+s);
     
            } 
    }
    

1. 1. 20 0 20 1

   
   
   

   2. 10 0 10 1

   
   
   

   3. 10 0 0 10

   
   
   

   4. 20 0 0 20

   
   
   

   5. 10 10 0 1

   
   
   

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1. View Hint View Answer Discuss in Forum

   None of these

   Correct Option: B

   Expression will evaluate from right to left.
   output: 10 0 10 1

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23. Which of these lines of code will give better performance?
    

    
       1. p | 8 + r >> q & 10; 
       2. (p | ((( 8 * r) >> q ) & 10 ))
    

1. 1. 2 will give better performance as it has parentheses.

   
   
   

   2. Dependent on the computer system.

   
   
   

   3. 1 will give better performance as it has no parentheses.

   
   
   

   4. Both 1 & 2 will give equal performance.

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   Parentheses do not degrade the performance of the program. Adding parentheses to reduce ambiguity does not negatively affect your system.

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24. What is the output of this program?
    

    
    public class Result
    {
            public static void main(String args[]) 
            {    int q,r;
                 int p=q=r=26;
                 System.out.print(+p);
     
            } 
    }
    

1. 1. 25

   
   
   

   2. 26

   
   
   

   3. 27

   
   
   

   4. 24

   
   
   

   5. 23

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   output: 26

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25. What is the output of this program?
    

    
    public class operators 
        {
            public static void main(String args[]) 
            {    
                 int p = 10;
                 System.out.println(++p * 5 + " " + p);
            } 
        }
    

1. 1. 44 11

   
   
   

   2. 33 11

   
   
   

   3. 55 11

   
   
   

   4. 66 11

   
   
   

   5. 11 55

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   Operator ++ has higher precedence than multiplication operator, *, p is incremented to 11 than multiplied with 5 giving 55.
   output: 55

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