Interview Questions

1. 1. Which of these method is used to implement Runnable interface?

Options:

a. stop()

b. run()

c. runThread()

d. stopThread()

Reveal Answer

2. 2. Which of these interface is implemented by Thread class?

Options:

a. Runnable

b. Connections

c. Set

d. MapConnections

Reveal Answer

3. 3 Which of these method is used to begin the execution of a thread?

Options:

a. run()

b. start()

c. runThread()

d. startThread()

Reveal Answer

4. 4. Which of these method waits for the thread to treminate?

Options:

a. sleep()

b. isAlive()

c. join()

d. stop()

Reveal Answer

5. 5. Which of these statement is incorrect?

Options:

a. A thread can be formed by implementing Runnable interface only.

b. A thread can be formed by a class that extends Thread class.

c. start() method is used to begin

d. run() method is used to begin execution of a thread before start() method in special cases.

Reveal Answer

6. 6. What is the output of this program? class newthread implements Runnable { Thread t; newthread() { t = new Thread(this,"My Thread"); t.start(); } public void run() { System.out.println(t.getName()); } } class multithreaded_programing { public static void main(String args[]) { new newthread(); } }

Options:

a. My Thread

b. Thread[My Thread,5,main]

c. Compilation Error

d. Runtime Error

Reveal Answer

7. 7. What is the output of this program? class newthread implements Runnable { Thread t; newthread() { t = new Thread(this,"My Thread"); t.start(); } public void run() { System.out.println(t); } } class multithreaded_programing { public static void main(String args[]) { new newthread(); } }

Options:

a. My Thread

b. Thread[My Thread,5,main]

c. Compilation Error

d. Runtime Error

Reveal Answer

8. 8. What is the output of this program? class newthread implements Runnable { Thread t; newthread() { t = new Thread(this,"My Thread"); t.start(); } } class multithreaded_programing { public static void main(String args[]) { new newthread(); } }

Options:

a. My Thread

b. Thread[My Thread,5,main]

c. Compilation Error

d. Runtime Error

Reveal Answer

9. 9. What is the output of this program? class newthread implements Runnable { Thread t; newthread() { t = new Thread(this,"New Thread"); t.start(); } public void run() { t.setPriority(Thread.MAX_PRIORITY); System.out.println(t); } } class multithreaded_programing { public static void main(String args[]) { new newthread(); } }

Options:

a. Thread[New Thread,0,main]

b. Thread[New Thread,1,main]

c. Thread[New Thread,5,main]

d. Thread[New Thread,10,main]

Reveal Answer

10. 10. What is the output of this program? class newthread implements Runnable { Thread t; newthread() { t1 = new Thread(this,"Thread_1"); t2 = new Thread(this,"Thread_2"); t1.start(); t2.start(); } public void run() { t2.setPriority(Thread.MAX_PRIORITY); System.out.print(t1.equals(t2)); } } class multithreaded_programing { public static void main(String args[]) { new newthread(); } }

Options:

a. true

b. false

c. truetrue

d. falsefalse

Reveal Answer

11. 11. Which of these method can be used to make the main thread to be executed last among all the threads?

Options:

a. A. stop()

b. sleep()

c. join()

d. call()

Reveal Answer

12. 12. Which of these method is used to find out that a thread is still running or not?

Options:

a. run()

b. Alive()

c. isAlive()

d. checkRun()

Reveal Answer

13. 13. What is the default value of priority variable MIN_PRIORITY AND MAX_PRIORITY?

Options:

a. 0 & 256

b. 0 & 1

c. 1 & 10

d. 1 & 256

Reveal Answer

14. 14. Which of these method waits for the thread to treminate?

Options:

a. sleep()

b. isAlive()

c. join()

d. stop()

Reveal Answer

15. 15. Which of these method is used to explicitly set the priority of a thread?

Options:

a. set()

b. make()

c. setPriority()

d. makePriority()

Reveal Answer

16. 16. What is synchronization in reference to a thread?

Options:

a. It’s a process of handling situations when two or more threads need access to a shared resource.

b. Its a process by which many thread are able to access same shared resource simultaneously.

c. Its a process by which a method is able to access many different threads simultaneously.

d. Its a method that allow to many threads to access any information require.

Reveal Answer

17. 17. Which of these method is used to implement Runnable interface?

Options:

a. stop()

b. run()

c. runThread()

d. stopThread()

Reveal Answer

18. 18. Which of these interface is implemented by Thread class?

Options:

a. Runnable

b. Connections

c. Set

d. MapConnections

Reveal Answer

19. 19. Which of these method is used to begin the execution of a thread?

Options:

a. run()

b. start()

c. runThread()

d. startThread()

Reveal Answer

20. 20. Which of these method waits for the thread to treminate?

Options:

a. sleep()

b. isAlive()

c. join()

d. stop()

Reveal Answer

21. 21. Which of these statement is incorrect?

Options:

a. A thread can be formed by implementing Runnable interface only.

b. A thread can be formed by a class that extends Thread class.

c. start() method is used to begin execution of the thread.

d. run() method is used to begin execution of a thread before start() method in special cases.

Reveal Answer

22. 22. Which of these class is used to make a thread?

Options:

a. String

b. System

c. Thread

d. Runnable

Reveal Answer

23. 23. Which of these interface is implemented by Thread class?

Options:

a. Runnable

b. Connections

c. Set

d. MapConnections

Reveal Answer

24. 24. Which of these method of Thread class is used to find out the priority given to a thread?

Options:

a. get()

b. ThreadPriority()

c. getPriority()

d. getThreadPriority()

Reveal Answer

25. 25. Which of these method of Thread class is used to Suspend a thread for a period of time?

Options:

a. sleep()

b. terminate()

c. suspend()

d. stop()

Reveal Answer

26. 26. Which function of pre defined class Thread is used to check weather current thread being checked is still running?

Options:

a. isAlive()

b. Join()

c. isRunning()

d. Alive()

Reveal Answer

27. 27. What is multithreaded programming?

Options:

a. It’s a process in which two different processes run simultaneously.

b. It’s a process in which two or more parts of same process run simultaneously.

c. Its a process in which many different process are able to access same information.

d. Its a process in which a single process can access information from many sources.

Reveal Answer

28. 28. Which of these are types of multitasking?

Options:

a. Process based

b. Thread based

c. Process and Thread based

d. None of the mentioned

Reveal Answer

29. 29. Which of these packages contain all the Java’s built in exceptions?

Options:

a. java.io

b. java.util

c. java.lang

d. java.net

Reveal Answer

30. 30. Thread priority in Java is?

Options:

a. Integer

b. Float

c. double

d. long

Reveal Answer

31. 31. What will happen if two thread of same priority are called to be processed simultaneously?

Options:

a. Any one will be executed first lexographically

b. Both of them will be executed simultaneously

c. None of them will be executed

d. It is dependent on the operating system.

Reveal Answer

32. 32. Which of these statements is incorrect?

Options:

a. By multithreading CPU’s idle time is minimized, and we can take maximum use of it.

b. By multitasking CPU’s idle time is minimized, and we can take maximum use of it.

c. C. Two thread in Java can have same priority

d. A thread can exist only in two states, running and blocked.

Reveal Answer

Interview Questions and Answer

1. 1. Which of these method is used to implement Runnable interface?

2. 2. Which of these interface is implemented by Thread class?

3. 3 Which of these method is used to begin the execution of a thread?

4. 4. Which of these method waits for the thread to treminate?

5. 5. Which of these statement is incorrect?

7. 7. What is the output of this program? class newthread implements Runnable { Thread t; newthread() { t = new Thread(this,"My Thread"); t.start(); } public void run() { System.out.println(t); } } class multithreaded_programing { public static void main(String args[]) { new newthread(); } }

8. 8. What is the output of this program? class newthread implements Runnable { Thread t; newthread() { t = new Thread(this,"My Thread"); t.start(); } } class multithreaded_programing { public static void main(String args[]) { new newthread(); } }

11. 11. Which of these method can be used to make the main thread to be executed last among all the threads?

12. 12. Which of these method is used to find out that a thread is still running or not?

13. 13. What is the default value of priority variable MIN_PRIORITY AND MAX_PRIORITY?

14. 14. Which of these method waits for the thread to treminate?

15. 15. Which of these method is used to explicitly set the priority of a thread?

16. 16. What is synchronization in reference to a thread?

17. 17. Which of these method is used to implement Runnable interface?

18. 18. Which of these interface is implemented by Thread class?

19. 19. Which of these method is used to begin the execution of a thread?

20. 20. Which of these method waits for the thread to treminate?

21. 21. Which of these statement is incorrect?

22. 22. Which of these class is used to make a thread?

23. 23. Which of these interface is implemented by Thread class?

24. 24. Which of these method of Thread class is used to find out the priority given to a thread?

25. 25. Which of these method of Thread class is used to Suspend a thread for a period of time?

26. 26. Which function of pre defined class Thread is used to check weather current thread being checked is still running?

27. 27. What is multithreaded programming?

28. 28. Which of these are types of multitasking?

29. 29. Which of these packages contain all the Java’s built in exceptions?

30. 30. Thread priority in Java is?

31. 31. What will happen if two thread of same priority are called to be processed simultaneously?

32. 32. Which of these statements is incorrect?

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