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Interview question tracker

OpenAI SDE 2

The 17 highest-frequency questions from all time. Finish the strongest signals first.

Latest source check: 12 Oct 2026ⓘLatest successful check of the sources used by this company. A check does not necessarily mean the questions changed.

One question at a time.

Top questions 17

Done	Question	LeetCode
Mark Design Memory Allocator completed	Design Memory Allocator	Solve
Mark Design SQL completed	Design SQL	Solve
Mark Encode and Decode Strings completed	Encode and Decode Strings	Solve
Mark Flatten Nested List Iterator completed	Flatten Nested List Iterator	Solve
Mark Rotting Oranges completed	Rotting Oranges	Solve
Mark IP to CIDR completed	IP to CIDR	Solve
Mark Time Based Key-Value Store completed	Time Based Key-Value Store	Solve
Mark Design Excel Sum Formula completed	Design Excel Sum Formula	Solve
Mark Simplify Path completed	Simplify Path	Solve
Mark Asteroid Collision completed	Asteroid Collision	Solve
Mark Design Authentication Manager completed	Design Authentication Manager	Solve
Mark Design Hit Counter completed	Design Hit Counter	Solve
Mark Design Spreadsheet completed	Design Spreadsheet	Solve
Mark Largest Local Values in a Matrix completed	Largest Local Values in a Matrix	Solve
Mark LRU Cache completed	LRU Cache	Solve
Mark Snapshot Array completed	Snapshot Array	Solve
Mark Trapping Rain Water completed	Trapping Rain Water	Solve