JAVA INTERNSHIP

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📝 Online Exam Instructions – Read Carefully Before Starting

1️⃣ Exam Details:

✅ Total Questions: (25 Questions)
✅ Exam Duration: (10 Minutes)

✅ Exam Type: MCQs

2️⃣ System Requirements:

✔ Use a laptop/desktop with a stable internet connection.
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✔ Ensure your webcam & microphone are working (if required).

3️⃣ Before Starting the Exam:

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4️⃣ Submission & Certification Process:

📌 Ensure all answers are submitted before the timer ends.
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The number of attempts remaining is 2

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1 / 25

1. What is the output of the following code?

StringBuilder sb = new StringBuilder(Hello");

sb.append(" World");

System.out.println(sb.toString());

2 / 25

2. Which of the following is NOT a valid access modifier in Java?

3 / 25

3. What will be the output of the following code? 

   public class Test {

       public static void main(String[] args) {

           System.out.println(10 + 20 + "Hello");

       }

   }

4 / 25

4. Which of the following creates a new thread?

5 / 25

5. What is the output of the following code?

int[] numbers = {1, 2, 3};

System.out.println(numbers[0] + numbers[1] + numbers[2]);

6 / 25

6. What will be the output of this code? 

    public class Example {

        public static void main(String[] args) {

            double d = 10.0 / 0;

            System.out.println(d);

        }

    }

7 / 25

7. What will be the output of this code? 

    public class Test

    {

        public static void main(String[] args)

        {

            int x = 5;

            int y = 10;

            x = y;

            System.out.println(x);

        }

    }

8 / 25

8. Which of these will cause a compilation error?

9 / 25

9. What happens if you try to assign a value to a final variable?

10 / 25

10. How do you declare an array in Java?

11 / 25

11. What is the output of this code?

String str = null;

System.out.println(str);

12 / 25

12. Which of these statements is true?

13 / 25

13. What is the purpose of the 'static' keyword in Java?

14 / 25

14. What does the 'volatile' keyword mean in Java?

15 / 25

15. Which of the following is true about Java Strings?

16 / 25

16. What is the difference between ArrayList and LinkedList in Java?

17 / 25

17. What is a Java Enum?

18 / 25

18. How does the hashCode() method work in Java?

19 / 25

19. What is the significance of this keyword in Java?

20 / 25

20. Explain the concept of composition in Java.

21 / 25

21. What is garbage collection in Java?

22 / 25

22. What is the java.util.Optional class?

23 / 25

23. How can you use Aspect-Oriented Programming (AOP) in Spring?

24 / 25

24. What is the role of Callable in Java?

25 / 25

25. Explain method overloading in Java.