3 pages from the guide: the cover, the contents (88 questions in 15 sections) and one complete question with its answer, code and interview tips.
"What's new since Java 8?" is now a standard interview question, and senior rounds go deep into virtual threads, records and pattern matching. This guide walks through Java 9 to 27 release by release: what each feature does, why it was added, the traps, and how to migrate a real codebase from 8 to 17, 21 and 25.
88 questions in 15 sections, 75 code examples and 35 diagrams in a 91-page PDF (2026 edition).
100 Java Collections Framework interview questions with detailed answers, code examples and performance tips.
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Start with the version your target company uses and the one before it. Run the code samples on JDK 21 or 25, and prepare a two-minute answer on how you would migrate a service from Java 8 to 21.
Tech TribersStream.toList() and collect(Collectors.toList())?Stream.toList() (Java 16) returns an unmodifiable list and allows null elements. Collectors.toList() makes no guarantees about type or mutability (in practice a mutable ArrayList), and Collectors.toUnmodifiableList() is unmodifiable but rejects nulls.
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It covers this topic in depth. It is one topic from the TechTribers Java Interview Series, which has all 23 parts (1,200+ questions) in one bundle.
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A library of 12+ Java e-books covering basics, OOP, DSA, problem solving and interview prep.
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The all-in-one Java bundle: 3000+ interview questions, 50+ e-books, 500+ coding problems, DSA notes and bonus courses.
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