...Beyond Java, it includes databases, computer networks, operating systems, distributed systems, and common algorithmic topics to mirror real interview scopes. The notes emphasize high-value concepts, pitfalls, and frequently asked questions, often pairing concise explanations with diagrams or sample code. Checklists, topic maps, and links help learners plan a study path rather than passively reading. It is widely used by students and working engineers to systematize preparation and build confidence before on-sites or coding screens.