Quiz Discussion

What is the order of precedence (highest to lowest) of following operators?

    1. &    
    2. ^
    3. ?:
Course Name: Java

  • 1]

    1 -> 2 -> 3

  • 2]

    2 -> 1 -> 3

  • 3]

    3 -> 2 -> 1

  • 4]

    2 -> 3 -> 1

Solution
No Solution Present Yet

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# Quiz
1
Discuss

What will be the output of the following Java program?

    class bitwise_operator 
    {
        public static void main(String args[])
        {
            int var1 = 42;
            int var2 = ~var1;
            System.out.print(var1 + " " + var2);     	
        } 
    }

 

  • 1]

    42 42

  • 2]

    43 43

  • 3]

    42 -43

  • 4]

    42 43

Solution
2
Discuss

What should be expression1 evaluate to in using ternary operator as in this line?

 expression1 ?  expression2  :  expression3
  • 1]

    Integer

  • 2]

    Floating – point numbers

  • 3]

    Boolean

  • 4]

    None of the mentioned

Solution
3
Discuss

What will be the output of the following Java code?

    class operators 
    {
        public static void main(String args[])
        {
            int var1 = 5; 
            int var2 = 6;
            int var3;
            var3 = ++ var2 * var1 / var2 + var2;
            System.out.print(var3);
        } 
    }

 

  • 1]

    10

  • 2]

    11

  • 3]

    12

  • 4]

    56

Solution
4
Discuss

Which right shift operator preserves the sign of the value?

  • 1]

    <<

  • 2]

    >>

  • 3]

    <<=

  • 4]

    >>=

Solution
5
Discuss

Which of these have highest precedence?

  • 1]

    ()

  • 2]

    ++

  • 3]

    *

  • 4]

    >>

Solution
6
Discuss

What is the output of relational operators?

  • 1]

    Integer

  • 2]

    Boolean

  • 3]

    Characters

  • 4]

    Double

Solution
7
Discuss

What will be the output of the following Java code?

    class Output 
    {
        public static void main(String args[]) 
        {    
             boolean a = true;
             boolean b = false;
             boolean c = a ^ b;
             System.out.println(!c);
        } 
    }

 

  • 1]

    0

  • 2]

    1

  • 3]

    true

  • 4]

    false

Solution
8
Discuss

With x = 0, which of the following are legal lines of Java code for changing the value of x to 1?

   1. x++;
   2. x = x + 1;
   3. x += 1;
   4. x =+ 1;
  • 1]

    1, 2 & 3

  • 2]

    1 & 4

  • 3]

    1, 2, 3 & 4

  • 4]

    3 & 2

Solution
9
Discuss

Which of these lines of Java code will give better performance?

   1. a | 4 + c >> b & 7; 
   2. (a | ((( 4 * c ) >> b ) & 7 ))
  • 1]

    1 will give better performance as it has no parentheses

  • 2]

    2 will give better performance as it has parentheses

  • 3]

    Both 1 & 2 will give equal performance

  • 4]

    Dependent on the computer system

Solution
10
Discuss

Which operator is used to invert all the digits in a binary representation of a number?

  • 1]

    ~

  • 2]

    <<<

  • 3]

    >>>

  • 4]

    ^

Solution
# Quiz