eBay·Software Engineer

eBay Software Engineer interview experience

Medium

Neutral

Candidate report, summarized by Dataford

My eBay technical interview leaned heavily into language internals and systems concepts across Java and C++.

I was asked about how HashMap works under the hood, including how collisions are handled and how thread safety differs between HashMap and ConcurrentHashMap. We covered volatile, and distinctions between final, finally, and finalize.

The discussion expanded into concurrency topics like the ABA problem related to AtomicInteger, plus caching behavior with write-back vs write-through. I also got asked networking questions comparing TCP and UDP, including how TCP detects packet loss. Then I switched into C++ fundamentals, where I was asked about string assignment and how to detect memory

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