Q81.

Explain deadlock and how to prevent it.

Q82.

What is thread pool tuning?

Q83.

Explain Java Stream internals.

Q84.

What is Spliterator in Java?

Q85.

Explain weak references and soft references.

Q86.

What is Java agent?

Q87.

Explain JNI (Java Native Interface).

Q88.

What is reactive programming in Java?

Q89.

Explain backpressure in reactive systems.

Q90.

What is Spring dependency injection?