Design a rolling hit counter API

Quick Overview

This question evaluates proficiency with data structures for time-window aggregation and understanding of time/space trade-offs when counting events within a rolling interval.

Design a rolling hit counter API

Company: Google

Role: Software Engineer

Category: Coding & Algorithms

Difficulty: medium

Interview Round: Technical Screen

Quick Answer: This question evaluates proficiency with data structures for time-window aggregation and understanding of time/space trade-offs when counting events within a rolling interval.

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Jan 6, 2026, 12:00 AM
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