eBay DSA Interview Questions

What eBay asks in the DSA round

eBay covers medium DSA on arrays, trees and strings, then core CS fundamentals and a design round on search, listings and payments flows.

Across the 67 questions on this page, the weight sits on these patterns:

• Dynamic Programming — 11 questions · read the dynamic programming guide
• Breadth-First Search — 7 questions · read the breadth first search (bfs) guide
• Two Pointers — 6 questions · read the two pointers guide
• Divide and Conquer — 4 questions
• Greedy — 4 questions · read the greedy guide
• Sliding Window — 4 questions · read the sliding window guide
• Binary Search — 3 questions · read the modified binary search guide
• Depth-First Search — 3 questions · read the depth first search (dfs) guide

How to prepare for the eBay interview

1. 1. Start at the top of the list above. The patterns are ordered by how often eBay 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 dynamic programming 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 eBay topic you have actually covered.
4. 4. Write the approach before the code. eBay 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.

eBay interview questions — FAQ

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