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Prep plan

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GitLab Software Engineer Interview Questions

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

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Scalable Object-Oriented ServiceHard

Tests ability to design scalable services with efficient database interactions.

scalability

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Diagnose PostgreSQL Bottlenecks

Medium

Evaluates debugging approach for PostgreSQL performance and connection pool issues.

postgresqlquery optimization

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Actionable MR Code ReviewMedium

Evaluates code review quality, clarity, and ability to spot maintainability issues.

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Fix HTML/JS for Accessibility

Medium

Tests prioritization and ability to refactor UI code for accessibility and performance.

accessibilityjavascript

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Testing in Large Rails Apps

Medium

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

clean codeTesting

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Modularize Vue HTML and SCSS

Medium

Evaluates ability to refactor UI into maintainable Vue components.

refactoring

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Zero-Downtime DB Migrations

Hard

Evaluates migration strategy to maintain availability during schema changes.

zero downtime

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Refactor SQL Causing 500s

Hard

Tests ability to optimize SQL and reduce production errors during peak load.

Performance Tuningquery optimizationsql

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