Java Programming Structures

How is a single line comment created in Java?

• Two backward slashes at the beginning indicate that the line is a comment

• Two forward slashes at the beginning indicate that the line is a comment.

• A forward slash followed by two asterisks at the beginning indicate that the line is a comment.

• A forward slash followed by an asterisk at the beginning indicate that the line is a comment.

What will be output of below program?

public class Test {

public void main(String[] args) {

int x = 10*20-20;

System.out.println(x);

}

}

• Runtime Error

• Prints 180

• Prints 0

• None of the above

class Main {

public static void main(String args[]) {

int t;

System.out.println(t);

}

}

What is the output?

• 0

• Garbage Value

• Compiler Error

• Runtime Error

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); } }

• Compiler Error: Operator >> cannot be applied to negative numbers

• -2

  2

• 2

  2

• 0

  2

Which one of the following is NOT a correct variable name?

• 2bad

• zero

• theLastValueButOne

• year2000

What is the need to mention "static" before main method?

• To call main method without creating an object of class

• To make main method as class method common to all instances

• Both A and B

• None of the above

Choose a correct version of Java Documentation Comment?

• /*

  comments

  */

• /**

  comments

  */

• /*

  comments

  **/

• /**

  comments

  **/

String args[] in main method are used for?

public static void main(String args[])

{

//

}

• Passing arguments at compile time

• Passing arguments at run time

• Counting number of words

• Nothing

Choose a multiline comment in Java language below?

• /*comments are going

  cars are moving*/

• */comments are going

  cars are moving/*

• //comments are going

  cars are moving//

• None of the above