Java March

What will be the Result if we try to compile and execute this

class Test{

public static void main(String[] ar){

double d=1.2D;

System.out.println(d);

}

}

• Compilation Error

• 1.2

• 1.2D

• d

What is the extension for java?

Which of these is the correct way to name a variable?

• 45632

• 4variable

• player_Name

• player name

What does a comment look like in Java?

• //comment

• #comment

• comment

• **comment**

Which of these is an input device?

• Speaker

• Microphone

• Monitor

• Printer

Which of these is an output device?

• Trackpad

• Mouse

• Monitor

• Keyboard

What will the output be from the following code?

int a = 2

System.out.println("Hello" + a + "world!")

• Hello Hello world! world!

• Hello 2 world!

• Hello2world!

• Helloaworld!

What is the problem with this code?

Line 1: String myName = "Mary Jacobson";

Line 2: System.out.println ("My name is " + myname);

• Line 2: should be System.out.println ("My name is myName");

• Line 2: should be System.out.println ("My name is " + myName);

• There is no problem with the code

• Line 2: should be System.out.display("My name is " + myname);

Which of the following is a valid variable declaration in Java?

• int my Integer= 0;

• int int = 0;

• int myInteger = 0;

• int 1myInteger = 0;

int x = 10;

x = x + 5;

System.out.println(x);

• 10x

• x5

• 15

• 5