Companies / Microsoft

Microsoft practice pack

Product company. Engineering-led testing: code, design, and quality for scale.

These are our own practice questions for the kind of QA/SDET role this company hires for. They are not the company's real interview questions. Confirm the current process on the company's official careers page.

Skills this role is usually tested on

  • Coding
  • Test design
  • API and service testing
  • Debugging
  • Collaboration

Business areas used for scenarios

  • cloud
  • productivity software
  • developer tools
  • gaming

6 questions

Answer out loud first, then open the guide. Most people read the guide too early.

  1. 1

    How would you test a text editor's find and replace feature?

    mediumTest design

    A strong answer covers

    Case, whole word, regex, multiline, special characters, very large files, undo, selection scope, performance, accessibility and keyboard use.

  2. 2

    Implement an LRU cache and describe how you would test it.

    mediumCoding

    A strong answer covers

    Hash map plus doubly linked list for O(1). Tests: capacity one, eviction order, update refreshes recency, get on missing, concurrency if shared.

  3. 3

    A service passes in staging and fails in production under load. Where do you look?

    hardDebugging

    A strong answer covers

    Config and data differences, resource limits, timeouts and retries, connection pools, race conditions, and telemetry. Reproduce with a load test that matches production shape.

  4. 4

    How do you design tests for an API versioning change?

    mediumAPI testing

    A strong answer covers

    Compatibility tests for old clients, contract tests, deprecation behaviour, default version handling, and a rollout plan with usage telemetry.

  5. 5

    What would you check to say a new screen is accessible?

    mediumAccessibility

    A strong answer covers

    Keyboard only, focus order, labels and roles, contrast, screen reader flow, zoom and reflow, error messages, and an automated scan plus manual checks.

  6. 6

    How do you work with a developer who treats tests as your job only?

    easyCollaboration

    A strong answer covers

    Share the cost of defects, pair on a failing area, agree who writes unit and integration tests, and show data on where escapes came from.

Now say it to an interviewer

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