Data Structures & Algorithms Interview Questions
Master DSA interview questions: sliding window, dynamic programming, Blind 75, tree traversals, and core coding patterns asked at top tech companies.
Data structures and algorithms form the backbone of technical interviews at companies like Google, Meta, Amazon, and Microsoft. Interviewers use DSA questions to assess problem-solving skills, code clarity, and your ability to optimize time and space complexity. A strong grasp of common patterns—such as sliding window, two pointers, and dynamic programming—helps you recognize problem types quickly and deliver structured solutions under pressure.
This hub covers the most frequently asked DSA topics: sliding window for subarray and substring problems, dynamic programming for optimal substructure, the famous Blind 75 LeetCode problems, and tree traversals (inorder, preorder, BFS, DFS). Each topic includes curated interview questions with clear explanations and code examples in C# and Python. Use these guides to build a solid foundation and practice before your next coding round.
Trending Sub-topics
- Sliding Window— Sliding window pattern interview questions and solutions for arrays and strings.
- Dynamic Programming— Dynamic programming interview questions — memoization, tabulation, and optimal substructure.
- Blind 75— Blind 75 LeetCode problems — the most asked interview questions at FAANG companies.
- Tree Traversals— Tree traversal interview questions — inorder, preorder, postorder, BFS, DFS patterns.
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