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Updated weekly · Last refresh Oct 6

GitLab Software Engineer Interview Questions

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

50questions
~7htotal time
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1
CodingStart here. 8 questions · ~64 min
Golang Channels and DeadlocksHard

Evaluates understanding of Go concurrency primitives and deadlock diagnosis.

deadlockconcurrencyGitLab
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2
Security & Infrastructure17 questions · ~137 min
Change DNS on LinuxMedium

Evaluates Linux networking configuration knowledge and troubleshooting approach.

linuxGitLab
Check Disk SpaceEasy

Assesses ability to monitor storage capacity and diagnose disk-related issues.

linuxGitLab
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3
Execution4 questions · ~32 min
Package Software in New Build EnvMedium

Assesses adaptability and build/release process thinking under uncertainty.

GitLab
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4
System Design10 questions · ~80 min
Scalable Object-Oriented ServiceHard

Tests ability to design scalable services with efficient database interactions.

scalabilityGitLab
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5
Pipelines3 questions · ~24 min
Testing in Large Rails AppsMedium

Assesses test strategy, maintainability, and coverage for Rails services.

clean codeTestingGitLab
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6
Behavioral & Leadership5 questions · ~40 min
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7
More topics3 questions · ~24 min
Explain What GitLab IsEasy

Assesses your understanding of GitLab’s product and positioning.

company knowledgeCommunicationGitLab
Zero-Downtime DB MigrationsHard

Evaluates migration strategy to maintain availability during schema changes.

zero downtimeGitLab
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Top Customers by Sales RevenueEasy
Practice
Practice drill

Use GROUP BY and SUM to rank the top 10 customers by total revenue from a single sales table.

RankingGroup ByAggregationsHousecall ProEquifaxXYZ
SQL Retention Query for Premium UsersHard
Practice
Practice drill

Calculate GitLab Premium user week-over-week retention using joins, CTEs, date bucketing, and the LEAD window function.

Window FunctionsDate FunctionsJoinsGitLab
Datacenter Network TroubleshootingHard
Practice
Practice drill

Identify NVIDIA datacenter servers with failed leaf links or denied firewall flows using layered SQL diagnostics.

Lag/LeadNetworkingJoinsNVIDIA
The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.