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Prep plan
Updated weekly · Last refresh Oct 17

Google QA Engineer Interview Questions

The questions to prepare for a Google QA Engineer interview. Questions from real interview reports rank first. Updated daily.

50questions
~13htotal time
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1
CodingStart here. 20 questions · ~301 min
Longest Prefix-Suffix RelationMedium
Practice

Use KMP-style prefix matching to find the required prefix of A that appears at the end of B.

CodingArray ManipulationAlgorithmsGoogle
Match Objects Across ArraysMedium
Practice

Aggregate duplicate character values, multiply matching totals across two arrays, and return the combined running total.

aggregationArraysedge casesGoogle
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2
Execution20 questions · ~301 min
Test Strategy for Messenger AppMedium

Create a launch test strategy for messenger notifications and demonstrate a unit test for save_file().

automated testingalertingcross-functional executionGoogle
Testable Google Maps ProjectHard

Create a practical roadmap for making an untested Google Maps project testable without disrupting delivery.

automated testingcode maintainabilityautomation strategyGoogle
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3
Behavioral & Leadership6 questions · ~90 min
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4
More topics4 questions · ~60 min
Cross-Platform Test FrameworkHard

Design a framework that lets teams author integration and regression tests once across five application platforms.

mobile architecturedistributed systemsarchitecture patternsGoogle
User Count at a TimestampHard
Practice

Count distinct users active in Google services at each requested timestamp, including timestamps with no active users.

Joinsdata validationAggregationsGoogle
Test Fixture ExperienceHard
Recently asked

Design a reusable, isolated test fixture with clear boundaries, configurable defaults, dependency injection, and reliable cleanup.

Testabilitydesign patternsdesignGoogle
Restaurant Waiting List TestsHard

Design a restaurant waiting list and define comprehensive tests for its core behavior and edge cases.

booking logicdesignfailure modesGoogle
Hands-on SQL practiceWrite and run real queries in the editor. 2 drills · ~20 min
The finish line: interview-readyComplete all 50 questions plus 2 hands-on drills to finish this plan.