BloombergCoding·60 minMembers
Active Users Sliding Window
Members only
Implement a request-log aggregator that supports adding `(timestamp, userId)` events and returning the number of distinct users active in the last five minutes. The main trap is duplicate users inside...
SWE
streaming
sliding-window
hashmap
queue
tree
medium
Frequency
Single report
Last asked
2026-05-03
Stage
phone-screen
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