Java SSE Ultimate Learning Guide
A complete interview-prep lab: 138 DSA problems with an in-browser code runner, 35 LLD designs, HLD, and Java backend deep-dives.
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Everything needed to prepare for a Java Software/Senior Software Engineer interview, in one interactive guide:
Part 0 — Foundations: a conceptual Q&A bank, a DP mental model, a DSA pattern map, load balancer/proxy/API gateway concepts, a database scaling cheatsheet, deployment strategy, and API/JWT/idempotency fundamentals.
138 DSA problems, each with a runnable code lab (edit and run against real test cases directly in the browser), a step-by-step walkthrough, and multiple test cases per problem — arrays, strings, trees, graphs, dynamic programming, and more.
35 Low-Level Design (LLD) problems — object-oriented system designs like a car rental system, worked through in depth.
High-Level Design (HLD) expansion and backend high-yield topics, including HashMap internals in modern Java.
This is a genuinely large body of work — a real interview-prep course, not a teaser.