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Module 14: Concurrency and Multithreading

Lesson focus

Synchronization Mechanisms

Use synchronized blocks, ReentrantLock, and volatile fields correctly.

synchronized enforces mutual exclusion and provides happens-before ordering.

ReentrantLock offers timed locks, fairness, and manual control; always release in finally blocks.

volatile ensures visibility but not atomicity—use Atomic classes for compound actions.

Lesson quiz

What does volatile guarantee?

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