Java Core Mastery Part 4: Advanced Topics & Interview Mastery 🎯

This guide offers comprehensive preparation for senior Java developers aiming to excel in technical interviews. It covers Java 8+ features like Streams and Optionals, which minimize verbose code and null pointer exceptions, respectively. The guide emphasizes functional programming, generics, and essential design patterns, enabling the creation of robust and type-safe code. It also includes modern Java features and a compilation of interview questions. Real-world examples showcase Stream API applications, such as e-commerce order processing, and illustrate the benefits of using Optionals. The document also explores other elements of Java, including file I/O, JDBC, and system design basics, along with helpful career tips. The primary goal is to provide a complete understanding of core Java concepts to pass interviews. The guide also presents a cheat sheet for the Stream API.