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Zoom Video Communications Data Engineer Interview Questions

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

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1
PipelinesStart here. 4 questions · ~39 min
Handle Late Data in StreamingHard

Design a streaming pipeline that can absorb late-arriving events while keeping aggregates correct and downstream tables stable.

Stream ProcessingIdempotencyData ModelingZoom Video Communications
Design High-Throughput Event PipelineHard

Design a real-time event pipeline that can handle millions of events per second with sub-second latency.

data pipelineevent processinglatencyZoom Video Communications
Zero-Downtime Lakehouse MigrationHard

Tests migration strategy for data platforms, cutover planning, and reliability during transitions.

migrationCloudData ModelingZoom Video Communications
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2
SQL & Data Manipulation5 questions + 3 drills · ~79 min
Relational Schema for BillingHard

Tests database design, normalization, and integrity constraints for transactional billing data.

transactionsdata integrityData ModelingZoom Video Communications
Window Functions for Concurrent SessionsHard

Tests advanced SQL skills for session concurrency detection from raw telemetry logs.

Window FunctionsSelf-JoinssqlZoom Video Communications
Optimize Multi-Join Aggregate QueryHard

Tests query optimization skills across joins, aggregates, and performance troubleshooting.

Performance TuningJoinsAggregationsZoom Video Communications
Contact Center Agent Performance MetricsHard
Practice
Practice drill

Compute daily agent call KPIs and SLA using joins, aggregations, and window ranking in a contact center model.

ETLAggregationsData ModelingADP
Weekly Service KPI by TeamMedium
Practice
Practice drill

Analyze weekly service delivery performance by team using joins, a CTE, date aggregation, and KPI calculations.

KPIJoinssqlDeloitteReputation
Advanced SQL With PartitionsHard
Practice
Practice drill

Use CTEs, aggregations, and window functions to compare gender pay and find each department's second-highest salary.

Window FunctionsJoinssqlMeesho
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3
Behavioral & Leadership8 questions · ~78 min
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4
More topics2 questions · ~20 min
O(1) Insert Delete Random SetEasy
Practice

Implement a set-like structure using an array and hash map to support insert, delete, and random access in average O(1) time.

Hash TablesArraysData StructuresZoom Video Communications
Longest Subarray With Target SumMedium
Practice

Use prefix sums and a hash table to find the longest continuous subarray with a given sum in O(n) time.

Hash TablesArraysSearchingZoom Video Communications

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