23CSR306_Unit I

Which of the following is a valid main method signature in Java?

• public static int main(String[] args)

• public static void main(String args[])

• public void static main(String args[])

• public static void main()

What happens if you declare main as private static void main(String[] args)?

• Compilation error

• Runtime error

• Program executes normally

• JVM throws SecurityException

What is the result of the expression: 10 + 20 + "30"?

• "3030"

• "102030"

• "30"

• Error

What is the output of:
int a = 5;

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

• 11

• 12

• 13

• 14

Which of the following is not a primitive data type in Java?

• boolean

• int

• String

• double

What is the result of the following code?

byte b = 50;

b = b * 2;

System.out.println(b);

• 100

• Compilation error

• Runtime error

• 0

What is the output?

int x = 5;

int y = ++x * 2;

System.out.println(y);

• 10

• 12

• 11

• 13

Find the output:

int a = 10;

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

• 33

• 31

• 32

• 34

What will be the result of this expression?

System.out.println(10 + 20 * 3);

• 70

• 90

• 80

• 10202020

What is the output of the following code?

int x = 7;

int y = x++ + ++x + x-- + --x;

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

• 30

• 31

• 32

• 0