Describe Java 8 features
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Describe Java 8 features evaluates algorithm design, data structures, correctness, complexity, edge cases, and implementation details in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
What are the key new features introduced in Java 8? Explain when and how you would use lambda expressions, the Stream API, Optional, default methods on interfaces, and the java.time date/time API, with short examples.
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