Graph Algorithms You Must Know for FAANG Interviews

Mon, 06 Jul 2026 09:00:00 +0500

Graphs are the topic that most reliably separates prepared candidates from unprepared ones. Arrays and hash maps you can wing on general programming instinct; graph problems punish improvisation. And they’re everywhere in FAANG loops (course schedules, word ladders, islands, network delays, account merging) because real systems at these companies are graphs: social networks, service dependencies, road maps, build systems.

The good news: interview graph questions draw from a small, learnable core. Two traversals, three shortest-path algorithms, and about five recurring patterns cover the vast majority of what you’ll face. This page is the map of that territory: what to learn, in what order, with Python code for the essentials and links to the full day-by-day lessons in the 60-day curriculum.

Bfs on Algorithms in 60 Days

Graph Algorithms You Must Know for FAANG Interviews