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Threads MCQs

Practice Threads MCQs for competitive exams.

Threads MCQs

Practice questions from this topic.

What is the purpose of the yield() method in Java threads?

  1. A. It suspends the current thread indefinitely
  2. B. It suggests that the current thread should yield to other threads with the same priority
  3. C. It sets the priority of the current thread
  4. D. None of These
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In Java, can you force a thread to stop its execution using the stop() method?

  1. A. No, the stop() method is deprecated and cannot be used
  2. B. Only if the thread is marked as "final"
  3. C. Yes, but it is discouraged because it can leave the program in an inconsistent state
  4. D. Only if the thread is marked as "static"
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How can you check if a thread is still running in Java?

  1. A. By using the runStatus() method
  2. B. By using the isThreadAlive() method
  3. C. By using the isRunning() method
  4. D. By using the isAlive() method
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In Java, what is the difference between a thread's priority and its thread group's maximum priority?

  1. A. A thread's priority determines its relative importance, while the thread group's maximum priority sets an upper limit on thread priorities
  2. B. A thread's priority is always higher than the thread group's maximum priority
  3. C. A thread's priority is the same as the thread group's maximum priority
  4. D. A thread's priority is unrelated to the thread group's maximum priority
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What is the purpose of the join() method in Java threads?

  1. A. It synchronizes threads
  2. B. It resumes a paused thread
  3. C. It waits for a thread to complete its execution before moving on
  4. D. It starts a new thread
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In Java, what is the purpose of the sleep() method in threads?

  1. A. It terminates all threads in the program
  2. B. It pauses the execution of the current thread for a specified duration
  3. C. It resumes the execution of a thread
  4. D. None of These
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What is a race condition in multithreaded Java programs?

  1. A. A situation where threads synchronize perfectly
  2. B. A situation where threads never finish executing
  3. C. A situation where multiple threads access shared data simultaneously, leading to unpredictable results
  4. D. A situation where threads throw exceptions
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How can you achieve synchronization between threads in Java?

  1. A. By using the interrupt() method
  2. B. By using the wait() and notify() methods
  3. C. By using multiple catch blocks
  4. D. By using the synchronized keyword or synchronized blocks
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What is the result of calling the run() method directly instead of start() in Java threads?

  1. A. The run() method is executed in the current thread, not as a separate thread
  2. B. It starts a new thread and executes the run() method
  3. C. It stops the thread immediately
  4. D. It suspends the thread
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In Java, can a thread be restarted after it has completed execution?

  1. A. Yes, a thread can be restarted multiple times
  2. B. Only if the thread is marked as "final"
  3. C. Only if the thread is marked as "static"
  4. D. No, a thread cannot be restarted once it has completed
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What is the purpose of the start() method in Java threads?

  1. A. It resumes the execution of a thread
  2. B. It suspends the execution of a thread
  3. C. It starts the execution of a new thread
  4. D. It stops the execution of a thread
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How can you create a new thread in Java by implementing the Runnable interface?

  1. A. Create an object of the Thread class
  2. B. Create a class that implements the Runnable interface and override the run() method
  3. C. Use the start() method of the main thread
  4. D. None of These
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