Have you ever generated thread dumps or analyzed Thread Dumps?

Java Interview Questions and Answers (part 4)

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21. Have you ever generated thread dumps or analyzed Thread Dumps?

Answering this questions will show your in depth knowledge of Threads. Every experienced must know how to generate Thread Dumps

VisualVM is most popular way to generate Thread Dump and is most widely used by developers. It’s important to understand usage of VisualVM for in depth knowledge of VisualVM. I’ll recommend every developer must understand this topic to become master in multi threading.
It helps us in analyzing threads performance, thread states, CPU consumed by threads, garbage collection and much more. For detailed information see Generating and analyzing Thread Dumps using VisualVM - step by step detail to setup VisualVM with screenshots

jstack is very easy way to generate Thread dump and is widely used by developers. I’ll recommend every developer must understand this topic to become master in multi threading. For creating Thread dumps we need not to download any jar or any extra software. For detailed information see Generating and analyzing Thread Dumps using JSATCK - step by step detail to setup JSTACK with screenshots.

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Other Interview Questions

• What is Thread in java?
• Why destroy() methods is deprecated?
• Can we acquire lock on class? What are ways in which you can acquire lock on class?
• How you can handle uncaught runtime exception generated in run method?
• Does thread leaves object lock when wait() method is called?
• How thread can enter waiting, sleeping and blocked state and how can they go to runnable state ?
• What is significance of using Volatile keyword?
• Can you find whether thread holds lock on object or not?
• What is addShutdownHook method in java?
• Why suspend() and resume() methods are deprecated?
• More...