Java Multithreading MCQs with answers Page - 4

You will find multiple-choice questions (MCQs) related to #Java Multithreading here. Go through these questions to prepare effectively for your upcoming exams and interviews.

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Q. What will happen if a thread is sleeping and gets interrupted?

  • (A) It will ignore the interruption
  • (B) It will throw InterruptedException
  • (C) It will terminate silently
  • (D) It will restart

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Q. Which method causes the currently executing thread to pause and allow others to execute?

  • (A) stop()
  • (B) wait()
  • (C) yield()
  • (D) pause()

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Q. Which of these classes implement the Runnable interface?

  • (A) Thread
  • (B) Timer
  • (C) TimerTask
  • (D) All of the above

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Q. Which keyword is used to create a critical section in Java?

  • (A) protected
  • (B) volatile
  • (C) synchronized
  • (D) threadsafe

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Q. Which of the following best describes a daemon thread?

  • (A) It cannot be interrupted
  • (B) It runs in the background and does not prevent JVM from exiting
  • (C) It has higher priority than normal threads
  • (D) It is the main thread of execution

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Q. Which method is used to change a thread into a daemon thread?

  • (A) makeDaemon(true)
  • (B) setDaemon(true)
  • (C) runAsDaemon()
  • (D) markDaemon()

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Q. What happens if `wait()` is called outside a synchronized context?

  • (A) It works normally
  • (B) Thread is paused
  • (C) IllegalMonitorStateException is thrown
  • (D) Thread becomes daemon

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Q. Which method notifies all threads waiting on an object's monitor?

  • (A) notify()
  • (B) wakeAll()
  • (C) notifyAll()
  • (D) startAll()

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Q. Which of the following is true about the `volatile` keyword in Java?

  • (A) It makes a variable read-only
  • (B) It guarantees visibility of changes to variables across threads
  • (C) It synchronizes a block of code
  • (D) It locks the object for other threads

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Q. Which of the following is NOT a thread state in Java?

  • (A) NEW
  • (B) RUNNABLE
  • (C) STARTED
  • (D) BLOCKED

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