Topics (71)

Data Structures and Algorithms form the foundation of every coding interview at top tech companies. Whether you're preparing for interviews at Google, Amazon, Microsoft, or any startup, mastering these DSA topics is essential for success.

Essential DSA Topics to Master

• Arrays & Strings: The most common topic in coding interviews - two pointers, sliding window, prefix sums
• Trees & Graphs: BFS, DFS, binary search trees, shortest path algorithms
• Dynamic Programming: Memoization, tabulation, common DP patterns like knapsack and LCS
• Sorting & Searching: Binary search variations, merge sort, quick sort, and custom comparators
• Stack & Queue: Monotonic stacks, priority queues, BFS with queues
• Hash Tables: Frequency counting, two sum patterns, and collision handling

How to Use FleetCode Topics

Select any topic above to see all related coding problems organized by difficulty level. Start with Easy problems to build your foundation, then progress to Medium and Hard challenges. Each topic includes problems frequently asked in real interviews at top companies.