A tour of the 23-part, 1,208-question Java Interview Series: equals() and hashCode(), Java 10/11 features, ArrayDeque and ring buffers, Stream Gatherers and lazy evaluation, and production performance tuning, plus an overview of every part.
A library of 12+ Java e-books covering basics, OOP, DSA, problem solving and interview prep.
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100 Java Collections Framework interview questions with detailed answers, code examples and performance tips.
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88 interview questions on every Java release that matters, from modules and records to virtual threads, pattern matching and Java 25.
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Fast-track your Java skills and walk into coding interviews prepared. This all-in-one bundle is for graduates, self-taught programmers and experienced developers: the questions, the books, the practice problems and the notes, in one place.
Follow the 30-day Java interview roadmap: core Java and OOP in week 1, collections and Java 8 in week 2, multithreading in week 3, Spring Boot and mock interviews in week 4, with DSA every day. This bundle has material for every one of those days.
Immutability lets the JVM share String objects safely through the string pool, makes Strings safe to use as HashMap keys (their hash code never changes), and makes them thread-safe without locking. It also protects values such as file paths and connection URLs from being changed after a security check. Need to build a string in a loop? Use StringBuilder.
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With the core-Java questions and the types of interfaces in Java guide, then follow the roadmap.
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