Concepts of Locks and Deadlocks

Instructions

1. Your final score will reflect your grasp of the concepts—approach each question with precision.
2. Thoroughly review each solution before proceeding to ensure full understanding.
3. Final results will be available after submission to provide insights into areas for further improvement.
4. Maintain academic integrity—plagiarism undermines learning and professional growth.
5. Once submitted, responses are final, so ensure you’re confident in your answers.
6. These challenges are designed to test practical knowledge; apply your skills as you would in real-world scenarios.

All Problems

Question

Action

1. What does the term "starvation" refer to in multithreading?

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2. Which of the following is an example of a technique used to prevent deadlock in Java?

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3. Which method in the ReentrantLock class prevents deadlock by making the lock attempt limited by time?

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4. What is the lockInterruptibly() method in ReentrantLock used for?

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5. Which of the following deadlock detection tools is built into the Java runtime environment?

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6. In the case of nested locks, which of the following statements is true?

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7. What is a common strategy for resolving deadlocks once they have been detected?

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8. Which of the following is the most effective way to detect a deadlock in a multi-threaded application?

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9. Which of the following is the most appropriate solution when multiple threads need access to multiple resources without causing a deadlock?

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10. Which of the following tools can help in debugging deadlock situations in Java?

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1. What does the term "starvation" refer to in multithreading?

A situation where one thread holds a lock indefinitely

A situation where a thread is denied access to resources indefinitely

A situation where a thread cannot start due to excessive waiting

A situation where threads consume more resources than needed

2. Which of the following is an example of a technique used to prevent deadlock in Java?

Using a Lock object with a timeout

Using multiple threads for the same resource

Acquiring resources in a non-sequential order

Using Thread.sleep() for waiting

3. Which method in the ReentrantLock class prevents deadlock by making the lock attempt limited by time?

lockInterruptibly()

tryLock()

lock()

islocked()

4. What is the lockInterruptibly() method in ReentrantLock used for?

It allows a thread to wait indefinitely for a lock.

It allows a thread to interrupt another thread waiting for a lock.

It allows a thread to acquire the lock, interrupting the waiting period.

It allows a thread to acquire a lock while avoiding deadlocks.

5. Which of the following deadlock detection tools is built into the Java runtime environment?

Java Flight Recorder

Thread dump analysis

JConsole

All of the above

6. In the case of nested locks, which of the following statements is true?

A thread can acquire the same lock multiple times without causing a deadlock.

A thread can acquire the same lock only once.

A thread will never be able to acquire a lock it holds.

A deadlock always occurs if a thread tries to acquire a nested lock.

7. What is a common strategy for resolving deadlocks once they have been detected?

T erminating one or more threads involved in the deadlock

Releasing all resources held by threads

Restarting the JVM

Ignoring the deadlock and continuing execution

8. Which of the following is the most effective way to detect a deadlock in a multi-threaded application?

By analyzing thread dump logs

By printing the stack trace of all threads

By using a debugger

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9. Which of the following is the most appropriate solution when multiple threads need access to multiple resources without causing a deadlock?

Acquiring all resources simultaneously

Acquiring resources in the same order for all threads

Using Thread.interrupt() on threads

Using a single lock for all resources

10. Which of the following tools can help in debugging deadlock situations in Java?

Thread.dumpStack()

Java VisualVM

JConsole

All of the Above