X (Twitter) DSA Interview Questions

What X (Twitter) asks in the DSA round

X interviews centre on graphs, heaps and streaming-style problems that mirror the timeline, with a design round on fan-out and feed ranking at very high write volume.

Across the 51 questions on this page, the weight sits on these patterns:

• Database — 6 questions
• Dynamic Programming — 6 questions · read the dynamic programming guide
• Design — 5 questions · read the design data structure guide
• Breadth-First Search — 4 questions · read the breadth first search (bfs) guide
• Hash Table — 3 questions
• Simulation — 3 questions
• Two Pointers — 3 questions · read the two pointers guide
• Binary Search — 2 questions · read the modified binary search guide

How to prepare for the X (Twitter) interview

1. 1. Start at the top of the list above. The patterns are ordered by how often X (Twitter) uses them, so the first two or three buy you the most coverage per hour.
2. 2. Solve by pattern, not at random. Doing eight database problems in a row is what makes the ninth recognisable in an interview — jumping between topics does not.
3. 3. Tick problems off as you go so the gaps are visible. The per-pattern counts tell you which X (Twitter) topic you have actually covered.
4. 4. Write the approach before the code. X (Twitter) interviews are judged on the reasoning as much as the working solution.
5. 5. Pair this with the pattern guides when a topic is new, and the system design sheet if the role is senior enough to have that round.
6. 6. If this is a campus or off-campus drive rather than a lateral move, the placement preparation guide covers the stages around the DSA round — aptitude, core subjects and the HR interview — in the order they actually happen.

X (Twitter) interview questions — FAQ

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