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    • Java Variables

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    Question 1

    Which of the following is true about variable names in Java?


    • A

      Variable names can start with a number

    • B

      Variable names can contain special characters like @ or #

    • C

      Variable names are case-sensitive


    • D

      Variable names can be a Java keyword


    Question 2

    What is the correct way to declare a constant variable in Java?


    • A

      final int MAX = 100;

    • B

      const int MAX = 100;

    • C

      int const MAX = 100;


    • D

      MAX = 100;

    Question 3

    What will be the output of this Java program?

    Java 
    public class Demo {
    public static void main(String[] args) {
        int x = 10;
        {
            int x = 20;
            System.out.println(x);
        }
    }
}


    • A

      20

    • B

      10

    • C

      Compilation Error


    • D

      Runtime Error


    Question 4

    Which keyword is used to declare an integer variable in Java?


    • A

      define

    • B

      let

    • C

      int

    • D

      declare

    Question 5

    Which of the following is a valid integer literal?


    • A

      12.5

    • B

      0x1A

    • C

      "100"

    • D

      true

    Question 6

    Which of these performs explicit type casting?

    • A

      int z = (int) 5.9;

    • B

      double y = 3;

    • C

      int x = 5.0;

    • D

      float f = 5;


    Question 7

    What is the default value of an uninitialized int variable in a class?

    • A

      0

    • B

      null

    • C

      garbage value

    • D

      1

    Question 8

    Which type of casting happens automatically in Java?


    • A

      Narrowing

    • B

      Widening

    • C

      Reference

    • D

      Explicit

    There are 8 questions to complete.

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