5 DSA Patterns Every Beginner Should Master First
Skip the overwhelm. These five recurring patterns — two pointers, sliding window, BFS/DFS, dynamic programming, and binary search — show up in most interview questions. Here's how to start.
7/21/20261 min read
Most beginners try to grind hundreds of random problems before they've noticed the patterns underneath them. Two pointers handles sorted-array and string problems in linear time. Sliding window turns nested loops into a single pass for subarray and substring questions. BFS/DFS covers graph and tree traversal, including most "shortest path" and "connected components" questions. Dynamic programming is really just recursion with memory — once you can spot overlapping subproblems, it stops feeling like magic. Binary search isn't just for sorted arrays; it also works on answer spaces. Learn these five deeply, solve five to ten problems per pattern, and you'll recognize most interview questions as variations you've already seen. This is exactly how we structure the first month of our DSA + AI Placement Prep track — pattern first, volume second.
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