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What are virtual threads in Java 21 and how do they differ from traditional threads?
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How does record improve DTO handling in Java?
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Explain the difference between Optional.get(), orElse(), and orElseThrow().
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How does ConcurrentHashMap achieve thread safety internally?
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What are switch expressions and how are they different from switch statements?
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Explain the Fork/Join framework and its advantages.
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How does pattern matching for instanceof simplify Java code?
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How do you implement immutability in Java classes?
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What are the benefits of using streams and functional programming in Java?
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How does Java handle memory management for unreachable objects? https://www.reddit.com/r/ExperiencedDevs/comments/1p30o0i/java_interview_questions/