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eBay Coding Interview Questions

25 eBay coding interview problems with full optimal solutions — 8 easy, 12 medium, 5 hard. Every problem ships with multiple approaches (brute-force first, then the optimal), complexity tables for each, company-specific tips on what an eBay interviewer values, and a FAQ section.

Showing 2 problems of 25

  • #1easyvery frequently asked

    1. Two Sum

    eBay phone screens frequently open with Two Sum as a warm-up to test hash-map fluency. In an e-commerce context, think of it as finding two item prices in a cart that sum to a target gift-card value — a dead-simple scenario that reveals whether you default to O(n²) brute force or reach for a hash map immediately.

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  • #217easysometimes asked

    217. Contains Duplicate

    eBay uses duplicate detection extensively — deduplicating search results, preventing double-listings, and fraud detection all rely on fast membership checks. Contains Duplicate is the simplest form of this pattern and tests whether you instinctively reach for a Set over a nested loop when you need O(n) duplicate detection.

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eBay Coding Interview Questions — Full Solutions — InterviewChamp.AI