Java MCQ Questions - Operators & Assignments

This section focuses on the "operators and assignments" in Java programming. These Multiple Choice Questions (MCQ) should be practiced to improve the Java programming skills required for various interviews (campus interviews, walk-in interviews, company interviews), placements and other competitive examinations.

1. Which of the following can be operands of arithmetic operators?

A. Characters
B. Boolean
C. Numeric
D. Both Numeric & Characters

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2. Modulus operator, %, can be applied to which of these?

A. Both Integers and floating - point numbers
B. Integers
C. Floating - point numbers
D. None of the mentioned

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3. Decrement operator, −−, decreases the value of variable by what number?

A. 1
B. 2
C. 3
D. 4

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4. Which of these statements are incorrect?

A. Assignment operators can be used only with numeric and character data type
B. Assignment operators are more efficiently implemented by Java run-time system than their equivalent long forms
C. Assignment operators run faster than their equivalent long forms
D. None of the mentioned

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5. Can 8 byte long data type be automatically type cast to 4 byte float data type?

A. TRUE
B. FALSE
C. Can be true or false
D. can not say

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6. Evaluate the value of the expression?

  
		   6 - 2 + 10 % 4 + 7
		   

A. 14
B. 12
C. 13
D. 10

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7. What is/are highest order precedence operator(s) in Java?

A. ( )
B. { }
C. Both A & B
D. None of these

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8. The && and || operators

A. Compare two boolean values
B. Compare two numeric values
C. Combine two boolean values
D. Combine two numeric values

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9. Which of the following is the correct expression that evaluates to true if the number x is between 1 and 100 or the number is negative?

A. ((x < 100) && (x > 1)) && (x < 0)
B. ((x < 100) && (x > 1)) || (x < 0)
C. (1 > x > 100) || (x < 0)
D. 1 < x < 100 || x < 0

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10. Select from among the following character escape code which is not available in Java.

A. \\
B. \v
C. \a
D. \t

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11. What will be the output of the program?

class Main {
    public static void main(String [] args)
   {
     Main p = new Main();
     p.start();
   }
   void start()
   {
    long [] a1 = {3,4,5};
    long [] a2 = fix(a1);
	System.out.print(a1[0] + a1[1] + a1[2] + " ");
	System.out.println(a2[0] + a2[1] + a2[2]);
   }
   long [] fix(long [] a3)
   {
	a3[1] = 7;
	return a3;
   }
}

A. 12 15
B. 15 15
C. 3 7 5 3 7 5
D. 3 4 5 3 7 5

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12. What will be the output of the program?

class Main {
    public static void main(String [] args)
	{
	 Main p = new Main();
	 p.start();	
	}
	void start()
	{
	 boolean b1 = false;
	 boolean b2 = fix(b1);
	 System.out.println(b1 + " " + b2);
	}
	boolean fix(boolean b1)	
	{
	 b1 = true;
	 return b1;
	}
}

A. true true
B. true false
C. false true
D. false false

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13. What will be the output of the program?

class Main {
   public static void main(String [] args)
	{
	 Main p = new Main();
	 p.start();
	}
	void start()
	{
 	 String s1 = "s";
	 String s2 = fix(s1);
	 System.out.println(s1 + " " + s2);
	}
	String fix(String s1)
	{
	 s1 = s1 + "st";
	 System.out.print(s1 + " ");
	 return "st";
	}
}

A. s st
B. sst st
C. st s st
D. sst s st

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14. Which of the following will produce an answer that is closest in value to a double, d, while not being greater than d?

A. (int)Math.min(d);
B. (int)Math.abs(d);
C. (int)Math.max(d);
D. (int)Math.floor(d);

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15. Predict the output of following Java Program?

  
class Test {
	public static void main(String args[]) {
	 int x = -4;
	 System.out.println(x>>1);
	 int y = 4;
	 System.out.println(y>>1);
	}
}

A. Compiler Error: Operator >> cannot be applied to negative numbers
B. -2
2
C. 2
D. 2
2

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16. 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;

A. 1, 2 & 3
B. 1 & 4
C. 1, 2, 3 & 4
D. 3 & 2

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17. What is the output of this program?

class Main {
   public static void main(String args[])
	{
	 double var1 = 2 + 4;
	 double var2 = var1 / 4;
	 int var3 = 2 + 4;
	 int var4 = var3 / 4;
	 System.out.print(var2 + " " + var4);
	}
}

A. 0 1
B. 1 1
C. 1.5 1
D. 1.5 1.0

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18. What will be the output of the program?

class Main {
   public static void main(String [] args)
	{
	 int x=20;
	 String sup = (x < 15) ? "s" : (x < 22)? "t" : "h";
	 System.out.println(sup);
	}
}

A. s
B. t
C. h
D. Compilation fails

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19. What will be the output of the program?

  
class Bitwise
{
	public static void main(String [] args)
	{
	 int x = 11 & 9;
	 int y = x ^ 3;
	 System.out.println( y | 12 );
	}
}

A. 7
B. 0
C. 14
D. 8

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20. What is the output of this program?

  
class increment
{
	public static void main(String args[])
	{
	 int g = 5;
	 System.out.print(++g * 8);
	}
}

A. 44
B. 56
C. 48
D. 40

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21. What is the output of relational operators?

A. Integer
B. Boolean
C. Characters
D. Double

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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

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23. Which of the following operators can operate on a boolean variable?

A. &&
B. ==
C. ?:
D. +=

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24. Which of these operators can skip evaluating right hand operand?

A. !
B. |
C. &
D. &&

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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

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26. What is the output of this program?

  		 
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

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27. What is the output of this program?

  
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

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28. What is the output of this program?

  
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

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29. What is the output of this program?

  
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

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30. Which of these have highest precedence?

A. ()
B. ++
C. *
D. >>

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

  
 expression1 ?   expression2  :  expression3

A. Integer
B. Floating - point numbers
C. Boolean
D. None of the mentioned

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32. What is the value stored in x in following lines of code?

  
int x, y, z;
x = 0;
y = 1;
x = y = z = 8;

A. 0
B. 1
C. 9
D. 8

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33. What is the order of precedence (highest to lowest) of following operators?
1. &
2. ^
3. ?:

A. 1 -> 2 -> 3
B. 2 -> 1 -> 3
C. 3 -> 2 -> 1
D. 2 -> 3 -> 1

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34. What is the output of this program?

  
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);
	}
}

A. 10
B. 11
C. 12
D. 56

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35. What is the output of this program?

class Main
{
public static void main(String args[])
	{
		int x = 8;
		System.out.println(++x * 3 + " " + x);
	}
}

A. 24 8
B. 24 9
C. 27 8
D. 27 9

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