Java Quiz - 1

JDK, JRE and JVM are __________

• platform-dependent

• platform-independent

public class Program{

    public static void main(String[] args) {

        System.out.println(null);

    }

}

• null

• compilation error

• runtime error

public class Quiz{

    public static void main(String[] args) {

        System.out.println((Object)null);

        System.out.println((String)null);

    }

}

• null

  null

• null

  Runtime error

• Compilation error

Given the following code, which expression displays the word "Equal"?

• 1. s1==s2

• 1. s1.matchCase(s2)

• 1. s1.equalsIgnoreCase(s2)

• 1. s1.equals(s2)

Predict the output ?

• Compilation error

• abc

• 411

• Runtime error

JVM allocates default values for Instance variables?

• true

• false

Is it necessary to create objects to access local variables?

• Yes

• No

Can local variables be used without initialization?

• Yes

• No

What's the output of the following code?

• 0

  1

• else

• compilation error

What's the output of the following code?

• 10

• 30

• 31