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面试准备

Java Multithreading 面试题与答案

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问题 6. What is deadlock in multithreading?

Deadlock is a situation where two or more threads are blocked forever, waiting for each other to release the locks.

Example:

Thread 1 locks resource A and waits for resource B. Thread 2 locks resource B and waits for resource A.

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问题 7. Explain the concept of thread safety.

Thread safety is a property that ensures that a block of code or a class can be safely executed by multiple threads concurrently without causing data corruption.

Example:

Using synchronized methods or blocks to control access to shared resources.

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问题 8. What is the purpose of the yield() method?

The yield() method is used to make the currently executing thread voluntarily pause, allowing other threads to execute.

Example:

Thread.yield();

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问题 9. What is the Thread Pool in Java?

A Thread Pool is a group of pre-initialized, reusable threads that are available to perform a set of tasks.

Example:

ExecutorService executor = Executors.newFixedThreadPool(5);

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问题 10. Explain the concept of the wait-notify mechanism.

The wait-notify mechanism is used for inter-thread communication, where one thread can signal the other that a certain condition has been met.

Example:

Using wait(), notify(), and notifyAll() methods in synchronized blocks.

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