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Pick interview patterns like sliding window, graphs, trees, and DP, then practice timed prompts by difficulty.
Visual practice for graph traversal, sorting, complexity understanding, and interview prep.
Choose an interview pattern, spin a targeted question, and solve under a timed session.
Selected Prompt
Longest Substring Without Repeat
Focus: Track character index and move left bound
Expected complexity: O(n)
Practice Timer
15:00
Solved in current session: 0
Available prompts in this filter: 1
Grinding random problems is inefficient. The Problem Pattern Picker categorizes questions by algorithmic pattern — sliding window, two pointers, BFS/DFS, dynamic programming, backtracking — so you build systematic muscle memory instead of memorizing solutions.
Track which patterns you have covered with Interview Prep Tracker.
Recurring algorithmic strategies — sliding window, two pointers, BFS/DFS, dynamic programming, greedy, divide and conquer — that apply across many different problems.
Instead of memorising individual solutions, you learn transferable techniques. Recognising a 'sliding window' pattern lets you solve dozens of substring/subarray problems.
Most interview problems map to 12–15 core patterns. Mastering these covers 80%+ of questions at top tech companies.
Check out our technical guides to learn more about how browser-side processing works.
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