Object Oriented Programming - I (3140705) MCQs

MCQs of Introduction to java and elementary programming

Showing 11 to 20 out of 95 Questions
1 2 3 4 5 6
11.
Which of these is not a bitwise operator?
(a) &
(b) &=
(c) |=
(d) <=
Answer:

Option (d)

12.
Which operator is used to invert all the digits in a binary representation of a number?
(a) ~
(b) <<<
(c) >>>
(d) ^
Answer:

Option (a)

13.
On applying Left shift operator, <<, on integer bits are lost one they are shifted past which position bit?
(a) 1
(b) 32
(c) 33
(d) 31
Answer:

Option (d)

14.
Which right shift operator preserves the sign of the value?
(a) <<
(b) >>
(c) <<=
(d) >>=
Answer:

Option (b)

15.
Which of these statements are incorrect?
(a) The left shift operator, <<, shifts all of the bits in a value to the left specified number of times
(b) The right shift operator, >>, shifts all of the bits in a value to the right specified number of times
(c) The left shift operator can be used as an alternative to multiplying by 2
(d) The right shift operator automatically fills the higher order bits with 0
Answer:

Option (d)

16.
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);     	
        } 
    }
(a) 42 42
(b) 43 43
(c) 42 -43
(d) 42 43
Answer:

Option (c)

17.
What will be the output of the following Java program? 
    class bitwise_operator 
    {
        public static void main(String args[]) 
        {    
             int a = 3;
             int b = 6;
 	     int c = a | b;
             int d = a & b;             
             System.out.println(c + " "  + d);
        } 
    }
(a) 7 2
(b) 7 7
(c) 7 5
(d) 5 2
Answer:

Option (a)

18.
What will be the output of the following Java program? 
    class leftshift_operator 
    {
        public static void main(String args[]) 
        {        
             byte x = 64;
             int i;
             byte y; 
             i = x << 2;
             y = (byte) (x << 2)
             System.out.print(i + " " + y);
        } 
    }
(a) 0 64
(b) 64 0
(c) 0 256
(d) 256 0
Answer:

Option (d)

19.
What will be the output of the following Java program? 
    class rightshift_operator 
    {
        public static void main(String args[]) 
        {    
             int x; 
             x = 10;
             x = x >> 1;
             System.out.println(x);
        } 
    }
(a) 10
(b) 5
(c) 2
(d) 20
Answer:

Option (b)

20.
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 = 3;
             a |= 4;
             b >>= 1;
             c <<= 1;
             a ^= c;
             System.out.println(a + " " + b + " " + c);
        } 
    }
(a) 3 1 6
(b) 2 2 3
(c) 2 3 4
(d) 3 3 6
Answer:

Option (a)

Showing 11 to 20 out of 95 Questions
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