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    • Java Quiz Day 47

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    Question 1

    Which of the following is the primary difference between a lock and a monitor in Java?

    • A

      A lock is used to block threads, while a monitor allows concurrent thread execution

    • B

      A lock requires manual release, while a monitor automatically releases the lock

    • C

      A lock is used for low-level memory management, while a monitor is used for thread management

    • D

      There is no difference; they are interchangeable terms

    Question 2

    Which of the following is true about thread safety in Java?

    • A

      Thread safety ensures that a class or method is accessed by one thread at a time

    • B

      Thread safety is irrelevant in Java

    • C

      Only one thread can run in a program at any time

    • D

      Thread safety is only needed for high-performance applications

    Question 3

    Which method can be used to ensure thread safety in Java?

    • A

      Using the volatile keyword

    • B

      Using synchronized blocks

    • C

      Using locks like ReentrantLock

    • D

      All of the above

    Question 4

    Which of the following describes a monitor in Java?

    • A

      A monitor allows synchronized access to a block of code by multiple threads

    • B

      A monitor is a type of thread pool

    • C

      A monitor ensures that only one thread can access a shared resource at a time

    • D

      A monitor prevents race conditions

    Question 5

    What is the ReentrantLock class used for?

    • A

      To ensure thread safety without using synchronized blocks

    • B

      To allow multiple threads to acquire the lock simultaneously

    • C

      To prevent deadlock situations

    • D

      To execute threads in parallel

    Question 6

    What does ThreadLocal provide in Java?

    • A

      It provides a separate copy of variables for each thread

    • B

      It ensures only one thread accesses a resource at a time

    • C

      It allows threads to share data safely

    • D

      It controls the number of threads running

    Question 7

    Which of the following best describes thread safety?

    • A

      Multiple threads can access the same resource simultaneously without causing errors

    • B

      Only one thread can access the resource at any time

    • C

      Threads are not allowed to access shared resources

    • D

      Threads execute in parallel without synchronization

    Question 8

    Which of the following does NOT guarantee thread safety?

    • A

      Synchronization

    • B

      Using ReentrantLock

    • C

      Using ThreadLocal

    • D

      Using multiple threads in parallel

    Question 9

    What is the benefit of using ReentrantLock over synchronization?

    • A

      ReentrantLock allows for more complex lock management and provides advanced features like try-lock

    • B

      ReentrantLock is faster than synchronized

    • C

      ReentrantLock allows multiple threads to execute concurrently

    • D

      None of the above

    Question 10

    What does thread safety ensure in Java?

    • A

      Only one thread can access a class or method at a time

    • B

      Threads can run independently without interference

    • C

      Threads run simultaneously without synchronization

    • D

      No thread can access a shared resource

    Tags:
    Java

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