1p3a Experience · Jan 2026

Countdown Latch

Interview Experience

Countdown Latch ## The Challenge You need to build a thread-safe counter. This counter allows several threads to pause and wait until the count drops to zero. You must create a CountdownLatch

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About This Question

This is a candidate experience report from a netflix interview for a swe role reported in 2025.

It covers the following topics: Array, System Design, Distributed Systems, Arrays .