Dataford
Top 25
Prep plan
Updated weekly · Last refresh Aug 30

Duolingo QA Engineer Interview Questions

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

25questions
~3htotal time
Track your progressSign up free to work through all 25 questions and resume where you left off.
Start practicing free →
1
ExecutionStart here. 12 questions · ~96 min
Decide What to AutomateEasy

Explain how you decide which tests to automate versus keep manual, balancing risk, cost, and long-term maintenance.

Trade-offsRisk AssessmentScope ManagementDuolingo
Testing Daily Streak Reset IssueHard

Tests your ability to design effective tests despite missing server-side error signals.

root causeDebuggingDuolingo
Testing Offline Mode in MobileMedium

Tests your ability to design tests for offline behavior, state transitions, and recovery.

mobile testingtest strategyDuolingo
Investigating Streak Reset Without ErrorsHard

Tests your debugging and investigation process across client behavior, data flows, and observability.

root causeDebuggingDuolingo
Streak Freeze Test DesignMedium

Tests your ability to translate product requirements into effective, scenario-based test cases.

edge casesDuolingo
More Execution questions with a free account
2
Behavioral & Leadership11 questions · ~88 min
When a Developer Disputes a BugMedium

Tests conflict resolution and influence in bug triage when a QA engineer must defend a defect with evidence and preserve collaboration.

Conflict Resolutionbug triageOwnershipDuolingo
More Behavioral & Leadership questions with a free account
3
More topics2 questions · ~16 min
JSON Parsing and Validation ScriptMedium

Tests your practical coding ability to validate API contracts and detect schema issues.

json parsingfunctionsvalidationDuolingo
Page Object Model for MobileMedium

Tests your ability to structure maintainable automation code using proven design patterns.

design patternsoopFrameworksDuolingo

Sign up to see every question

Create a free account to unlock this list and practice real interview questions.

Get my prep plan
The finish line: interview-readyComplete all 25 questions to finish this plan.