Quiz Discussion

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

    1. &    
    2. ^
    3. ?:

• 1]

  1 -> 2 -> 3

• 2]

  2 -> 1 -> 3

• 3]

  3 -> 2 -> 1

• 4]

  2 -> 3 -> 1

Which of these operators can skip evaluating right hand operand?

• 1]

  !

• 2]

  |

• 3]

  &

• 4]

  &&

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

Which of these statements are incorrect?

• 1]

  Equal to operator has least precedence

• 2]

  Brackets () have highest precedence

• 3]

  Division operator, /, has higher precedence than multiplication operato

• 4]

  Addition operator, +, and subtraction operator have equal precedence

What is the output of relational operators?

• 1]

  Integer

• 2]

  Boolean

• 3]

  Characters

• 4]

  Double

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

Which of these statements is correct?

• 1]

  true and false are numeric values 1 and 0

• 2]

  true and false are numeric values 0 and 1

• 3]

  true is any non zero value and false is 0

• 4]

  true and false are non numeric values

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

What will be the output of the following Java code?

    class ternary_operator 
    {
        public static void main(String args[]) 
        {        
             int x = 3;
             int y = ~ x;
             int z;
             z = x > y ? x : y;
             System.out.print(z);
        } 
    }

• 1]

  0

• 2]

  1

• 3]

  3

• 4]

  -4

What will be the output of the following Java program?

    class Output 
    {
        public static void main(String args[]) 
        {    
             int a = 1;
             int b = 2;
             int c;
             int d;
             c = ++b;
             d = a++;
             c++;
             b++;
             ++a;
             System.out.println(a + " " + b + " " + c);
        } 
    }

• 1]

  3 2 4

• 2]

  3 2 3

• 3]

  2 3 4

• 4]

  3 4 4