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Updated weekly · Last refresh Sep 26

Zoom Video Communications Backend Engineer Interview Questions

The questions to prepare for a Zoom Video Communications Backend Engineer interview. Questions from real interview reports rank first. Updated daily.

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1
CodingStart here. 7 questions · ~60 min
Build a Spring Boot AppHard

Evaluates your ability to implement a backend feature using Spring Boot under constrained tooling.

application developmentspring bootZoom Video Communications
Java Concurrency and Thread SafetyMedium

Evaluates your approach to concurrency control and correctness in distributed systems.

javathread safetyconcurrencyZoom Video Communications
Java Garbage Collection TuningMedium

Evaluates your knowledge of JVM GC behavior and practical tuning for throughput.

javaperformance optimizationZoom Video Communications
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2
System Design5 questions · ~43 min
Vending Machine LLDMedium

Evaluates your ability to design low-level components and interactions for a backend-style system.

Zoom Video Communications
Global Load Balancing StrategyHard

Assesses your ability to design traffic distribution for low-latency, high-availability video services.

load balancingZoom Video Communications
Fault-Tolerant Service DesignHard

Tests your ability to design resilient backend systems under partial failures.

system designfault toleranceZoom Video Communications
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3
More topics3 questions · ~26 min
Optimizing Backend PerformanceMedium

Assesses your execution skills in diagnosing and improving backend performance.

performance optimizationbottlenecksZoom Video Communications
Role Fit and Team ImpactMedium

Assesses how you connect your background to the Backend Engineer role and Zoom Video Communications team needs.

experiencerelevanceZoom Video Communications
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The finish line: interview-readyComplete all 15 questions to finish this plan.