Quick Answer
Deadlock: thread A holds lock X and waits for lock Y. Thread B holds lock Y and waits for lock X. Both wait forever. Prevention: always acquire locks in the same order across all threads. Alternatively: use tryLock() with timeout (ReentrantLock), use lock-free data structures, minimize lock scope, or avoid nested locks entirely. Use thread dumps to diagnose deadlocks in production.
Answer
Deadlock: Threads wait forever for each other's locks. Prevent by avoiding nested locks, ordering locks consistently, or using timeouts.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
