Which of the following is/are principle(s) of Object Oriented Programming?

1. Encapsulation
2. Abstraction
3. Inheritance
4. All of these

Predict the output of the following code snippet:

int a = 1;
int b = 2;
if  (a == b)
    System.out.println("Both values are equal");
else 
    System.out.println("Values are not equal");

1. Both values are equal
2. Incorrect use of the == operator
3. Values are not equal
4. No output

Which of the following is mandatory in the switch statement?

1. break
2. continue
3. case
4. default

Which of the following is not a valid method of the Scanner class?

1. next( )
2. nextInt( )
3. nextLong( )
4. nextNumber( )