Introduction to Java – Multiple Choice Questions (MCQs)

1. 25. Which operator is used for equality comparison in Java?

   • A. =
   • B. ==
   • C. ===
   • D. equals()

2. 26. Which operator is used for assignment in Java?

   • A. =
   • B. ==
   • C. ===
   • D. equals()

3. 27. What is the output of `System.out.println(Hello" + "World");`?"

   • A. HelloWorld
   • B. Hello World
   • C. Hello World
   • D. Error

4. 28. What is the output of `System.out.println(5 == 5.0);`?

   • A. TRUE
   • B. FALSE
   • C. error
   • D. depends on JVM

5. 29. What is the output of `System.out.println(5 === 5.0);`?

   • A. TRUE
   • B. FALSE
   • C. error
   • D. depends on JVM

6. 30. Which of the following is NOT a valid identifier in Java?

   • A. myVariable
   • B. my_variable
   • C. 1stVariable
   • D. $variable

7. 31. What is the purpose of the `package` keyword in Java?

   • A. To define a class
   • B. To group related classes
   • C. To import other classes
   • D. To define a method

8. 32. Which keyword is used to import classes from other packages?

   • A. import
   • B. include
   • C. using
   • D. package

9. 33. What is the default package in Java?

   • A. java.lang
   • B. java.util
   • C. current directory (no name)
   • D. default

10. 34. Which class is the ultimate superclass of all classes in Java?

    • A. Object
    • B. Class
    • C. Super
    • D. Base

11. 35. What is the role of the garbage collector in Java?

    • A. To manually free up memory
    • B. To automatically manage memory allocation
    • C. To optimize code execution
    • D. To handle exceptions

12. 36. What is the output of `System.out.println(2 << 2);`?

    • A. 4
    • B. 6
    • C. 8
    • D. 10