Evolve Duplicate Detection for Sliding Windows and Read-Heavy Queries
Company: Google
Role: Software Engineer
Category: Software Engineering Fundamentals
Difficulty: medium
Interview Round: Technical Screen
Overview: Trace duplicate detection from a basic set through a bounded sliding window to a read-heavy precomputed summary. The solution proves the window invariant and shows how the minimum gap between consecutive equal values enables constant-time threshold queries with linear rebuild time and storage.