Quiz on Java Operators

Find the output for the following.

public class IncDec

{

public static void main(String s[])

{

int a = 1;

int b = 2;

int c;

int d;

c = ++b;

d = a++;

c++;

System.out.println("a = " + a);

System.out.print("b = " + b);

System.out.println("c = " + c);

System.out.print("d = " + d);

}

}

• a = 2 b = 3 c = 4 d = 1

• a = 2 b = 3 c = 4 d = 1

• Program does not compile.

• a = 1 b = 2 c = 4 d = 2

What will be the output of the following program?

public class DemoOnOperators

{

public static void main(String[] args)

{

int input = 7;

int output = ++input + ++input + ++input;

System.out.println(output);

}

}

• -20

• 109

• 27

• 35

What will be the output of the following program?

public class DayMonthDemo

{

public static void main(String args[])

{

int num = 69;

int days = num % 30;

int month = num / 30;

System.out.println(month + " Month and " + days + " days");

}

}

• 3 Month and 9 days

• 2 Month and 9 days

• 0 Month and 69 days

• 0 Month and 29 days

Choose the incorrect statement about the following expressions?

a=a+1; // Expression 1

a++; // Expression 2

a+=1; // Expression 3

++a; // Expression 4

• All expressions give the same result

• 'Expression 2' is faster that 'Expression 3' which inturn is faster than 'Expression 1'

• The value of 'a' after 'Expression 2' is different from 'Expression 4'

• The value of 'a' after 'Expression 1' is same as 'Expression 3

What will be the output of the program?

class Test

{

public static void main(String [] args)

{

int x=20;

String sup = (x < 15) ? "small" : (x < 22)? "tiny" : "huge";

System.out.println(sup);

}

}

• small

• tiny

• huge

• Compilation fails

What is the output of the Java code snippet with Ternary operator?

String name = "java";

int marks = name == "java"?10:20;

System.out.println("Marks=" + marks);

• marks=0

• marks=10

• marks=20

• None of the above

Find the output of the following snippet.

class Numbers

{

public static void main(String args[])

{

int a=20, b=10;

if((a<b)&&(b++ <25))

{

System.out.println("this is any language logic");

}

System.out.println(b);

}

}

• 10

• 12

• 11

• Compilation Error