Object Oriented Programming - I (3140705) MCQs

MCQs of Introduction to java and elementary programming

Showing 21 to 30 out of 95 Questions
1 2 3 4 5 6
21.
What is the output of relational operators?
(a) Integer
(b) Boolean
(c) Characters
(d) Double
Answer:

Option (b)

22.
Which of these is returned by “greater than”, “less than” and “equal to” operators?
(a) Integers
(b) Floating – point numbers
(c) Boolean
(d) None of the mentioned
Answer:

Option (c)

23.
Which of the following operators can operate on a boolean variable? 
   1. &&
   2. ==
   3. ?:
   4. +=
(a) 3 & 2
(b) 1 & 4
(c) 1, 2 & 4
(d) 1, 2 & 3
Answer:

Option (d)

24.
Which of these operators can skip evaluating right hand operand?
(a) !
(b) |
(c) &
(d) &&
Answer:

Option (d)

25.
Which of these statements is correct?
(a) true and false are numeric values 1 and 0
(b) true and false are numeric values 0 and 1
(c) true is any non zero value and false is 0
(d) true and false are non numeric values
Answer:

Option (d)

26.
What will be the output of the following Java code? 
    class Relational_operator 
    {
        public static void main(String args[])
        {
            int var1 = 5; 
            int var2 = 6;
            System.out.print(var1 > var2);
        } 
    }
(a) 1
(b) 0
(c) True
(d) False
Answer:

Option (d)

27.
What will be the output of the following Java code? 
    class bool_operator 
    {
        public static void main(String args[]) 
        {    
             boolean a = true;
             boolean b = !true;
             boolean c = a | b;
 	     boolean d = a & b;
             boolean e = d ? b : c;
             System.out.println(d + " " + e);
        } 
    }
(a) false false
(b) true true
(c) true false
(d) false true
Answer:

Option (d)

28.
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);
        } 
    }
(a) 0
(b) 1
(c) 3
(d) -4
Answer:

Option (c)

29.
What will be the output of the following Java code? 
    class Output 
    {
        public static void main(String args[]) 
        {    
             int x , y = 1;
             x = 10;
             if (x != 10 && x / 0 == 0)
                 System.out.println(y);
             else
                 System.out.println(++y);
        } 
    }
(a) 1
(b) 2
(c) Runtime error owing to division by zero in if condition
(d) Unpredictable behavior of program
Answer:

Option (b)

30.
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);
        } 
    }
(a) 0
(b) 1
(c) false
(d) true
Answer:

Option (c)

Showing 21 to 30 out of 95 Questions
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