DSA with Java: 200 Q&A for Product Companies with LogicBrace

200 coding problems for the DSA/coding round at product-based companies (Amazon, Google, Microsoft, Flipkart, and similar), organized by problem-solving pattern rather than random topic order — the same structure used by the best-known paid DSA prep resources.

Twenty chapters take you from Foundational (Big-O analysis, Arrays & Strings, Hashing, Two Pointers) through Core Patterns (Sliding Window, Linked Lists, Stacks & Queues, Binary Search, Recursion & Backtracking, Trees, Heaps) into Advanced territory (Tries, Graph BFS/DFS, Union-Find & Dijkstra, 1D and 2D Dynamic Programming, Greedy Algorithms), finishing with an Expert tier covering Bit Manipulation, a chapter of genuinely hard mixed problems that combine multiple patterns the way real onsite rounds do, and a closing chapter on interview strategy.

Every single problem includes the problem statement, a clear explanation that walks through brute-force vs optimal reasoning before showing the final approach, a complete working Java solution, and a time/space complexity breakdown. Difficulty is tagged Easy/Medium/Hard.

This is a standalone guide with zero overlap with the rest of the catalog — Core Java Interview Q&A covers language and JVM internals, and System Design's LLD chapter covers class-level object-oriented design, neither of which touches algorithmic problem-solving.

Best for Java developers preparing for the coding round at product-based companies, at any experience level.

Not sure yet? Grab the free sample chapter (Dynamic Programming — 1D, 10 full problems) before you buy — https://drive.google.com/file/d/19D7xyd-19_gRrDthjY_sshmcaU3onjdm/view?usp=sharing