MediumHigh Frequency25 min

Interview Shortcuts & Tricks

XOR tricks, fast modular arithmetic, bit manipulation shortcuts, and common optimizations.

Time / space complexity quick reference, common interview pitfalls, FAANG coding interview tips, and the 20 most-tested patterns mapped to problems.

Interview Shortcuts & Mental Shortcuts

More in Pattern Recognition Center

Keyword → Pattern Decision Tree

Map problem keywords to the correct algorithm — subarray, K largest, shortest path, count ways and more.

Sliding Window vs Two Pointers vs Prefix Sum

Know exactly when to use each array technique and avoid common confusions.

Sliding Window vs Two Pointers vs Prefix Sum