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Updated weekly · Last refresh Aug 30

Zoom Communications Software Engineer Interview Questions

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

50questions
~7htotal time
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1
CodingStart here. 22 questions · ~179 min
JavaScript Function ScopeEasy
Recently asked

Tests knowledge of JavaScript scoping rules and their impact on code behavior.

javascriptfunctionsZoom Communications
Java Lambda vs TraditionalMedium
Recently asked

Tests understanding of Java functional features and comparator behavior.

javafunctionsZoom Communications
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2
SQL & Data Manipulation4 questions + 3 drills · ~62 min
SQL Rank vs Row NumberMedium
Recently asked

Tests ability to choose correct window functions and reason about ties and ordering.

queriessqlZoom Communications
Second Highest Without AggregatesHard
Practice
Practice drill

Find the second highest salary in each department without using aggregate functions.

SubqueriesRankingSelf-JoinsCredit GenieDevoteamCisco Restaurant + Bar
SQL Average Selling PriceMedium
Practice
Practice drill

Calculate weighted average selling prices by product using a date-range join, aggregation, and NULL handling.

leetcodesqlCostarCostar Group
SQL Queries for RankingMedium
Practice
Practice drill

Rank active HSBC employees by division and return every employee tied for the highest or second-highest salary.

javasqlHsbc
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3
System Design6 questions · ~49 min
Design and Implement a CacheHard

Tests system design and implementation ability for caching strategies and tradeoffs.

implementationZoom Communications
Improve Zoom Website UXHard

Evaluates product thinking and UX improvement approach for Zoom Communications.

user experiencedesign processZoom Communications
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4
Security & Infrastructure11 questions · ~89 min
TCP/IP and UDP HandshakeMedium

Evaluates networking fundamentals and protocol-level understanding.

NetworkingprotocolsZoom Communications
SIP Session Timer PurposeMedium

Tests understanding of SIP session management and protocol behavior.

session managementZoom Communications
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5
Behavioral & Leadership6 questions · ~49 min
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6
More topics1 question · ~8 min
Customer Request Issue TriageMedium

Tests debugging, triage, and customer-focused problem solving.

Problem SolvingZoom Communications
The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.