3 pages from the guide: the cover, the contents (100 questions in 14 sections) and one complete question with its answer, code and interview tips.
Most Java interviews include a coding round, and the same problems come back again and again. This guide solves the 100 that are asked most, in two rounds: the classic number, string and array programs first, then the harder two-pointer, sliding-window, heap, tree, graph, dynamic-programming and backtracking problems. Every solution states its time and space complexity and the edge cases an interviewer will probe.
100 questions in 14 sections, 100 code examples and 31 diagrams in a 93-page PDF (2026 edition).
Concise handwritten DSA notes with flowcharts and diagrams, built for product-company interview prep and quick revision.
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Read the problem, close the guide and solve it yourself first, then compare with the solution and its complexity. Do Round 1 in the first week and Round 2 in the second, and redo every problem you missed two days later.
Combine a HashMap<key, node> for O(1) lookup with a doubly-linked list ordered by recency. get moves the node to the front; put inserts at the front and evicts the node before the tail sentinel when over capacity.
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It covers this topic in depth. It is one topic from the TechTribers Java Interview Series, which has all 23 parts (1,200+ questions) in one bundle.
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150+ frequently asked microservices interview questions with explanations, hands-on examples and mock interviews.
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