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Anthropic runs an unusually small, transparent technical question bank — the recruiter typically names which prompt family you'll see days before the round, so candidates can target preparation precisely instead of guessing. Bars are calibrated for problem-solving velocity and follow-up depth rather than novelty; offers are decided by hiring committee + reference check, and the culture round on AI-safety alignment is the single most common rejection point even for candidates who clear every technical stage.

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Coding·55 min
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Coding Q1 — Concurrent Web Crawler

Implement a same-domain web crawler given a pre-supplied `htmlParser.getUrls(url)` helper. Starts as a single-threaded BFS; the bulk of the round is the follow-up to parallelize it (threads, processes, or async) and reason about scaling across machines.

SWE
MLE
Infra Eng
concurrency
threading
async
bfs
+2
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practice in the online judge
65 total
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