This comprehensive guide provides 240 frequently asked Core Java interview questions with clear and concise answers. It covers all the essential Java concepts, including object-oriented programming (OOP), collections framework, generics, exception handling, Java 8–17 features, multithreading, concurrency, JVM internals, memory management, garbage collection, and best coding practices. Each question is designed to test real-world understanding and practical knowledge, making this resource an ideal preparation tool for beginners, experienced developers, and professionals aiming for roles in top product companies, MNCs, and startups. With this collection, you’ll gain the confidence to tackle any Java interview with ease.