Implement Producer-Consumer problem (using BlockingQueue or wait/notify).

Implement a thread-safe Singleton (lazy initialization + double-checked locking).

How does ThreadLocal work? When would you use it?

Difference between sleep(), yield(), and wait().

Explain the difference between ReentrantLock and synchronized.

Implement a Rate Limiter in Java.

Write a program to print numbers in sequence using 3 threads (1,2,3…)

Question

Implement Producer-Consumer problem (using BlockingQueue or wait/notify).

Implement a thread-safe Singleton (lazy initialization + double-checked locking).

How does ThreadLocal work? When would you use it?

Difference between sleep(), yield(), and wait().

Explain the difference between ReentrantLock and synchronized.

Implement a Rate Limiter in Java.

Write a program to print numbers in sequence using 3 threads (1,2,3…)

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