Java

Covers Java 25 LTS. Latest release: Java 27 (Sept 2026).

1. 1JVM memory and garbage collection0 of 8 answers · pass with 70% over your last 8
2. 2Concurrency in depth (memory model, locks, CompletableFuture)
3. 3Performance tuning and profiling
4. 4Class loading and reflection
5. 5Virtual threads and structured concurrency
6. 6Design patterns and API design
7. 7Pitfalls in distributed and microservice Java
8. 8Security and serialization

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