Synchronized vs Lock in Java | Multithreading Question Part 1

Published: 11 January 2026
on channel: TechInterviewHelp

In this video, we will compare synchronized and Lock in Java and understand how they are used to achieve thread safety in multithreaded applications.

We’ll cover:
What is synchronized in Java
What is Lock (ReentrantLock)
Key differences between synchronized and Lock
When to use synchronized vs Lock
Real-world examples of thread synchronization
Common Java multithreading interview questions

This video is helpful for:
Java developers
Backend engineers
Interview preparation (Senior / Lead roles)
Anyone learning Java concurrency & multithreading

Topics Covered:
✔ Java Multithreading
✔ Thread Safety
✔ Concurrency Control
✔ synchronized keyword
✔ Lock interface
✔ ReentrantLock
✔ Deadlock & Performance considerations

If you are preparing for Java interviews or want to write efficient multithreaded code, this video will give you clear concepts with practical explanation.

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