Dataford
Top 6
Prep plan
Updated weekly · Last refresh Sep 22

Castlight QA Engineer Interview Questions

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

6questions
~1htotal time
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1
CodingStart here. 1 question · ~8 min
Reversing a StringEasy

Evaluates your basic coding ability and approach to implementing a simple string algorithm.

string manipulationCastlight
2
SQL & Data Manipulation1 question + 3 drills · ~38 min
SQL, UI, and CI/CD CoverageMedium

Tests your ability to validate data correctness, UI behavior, and release quality in CI/CD pipelines.

CI/CDsqlCastlight
Extract Domain From EmailsEasy
Practice
Practice drill

Extract normalized domain names from valid raw email addresses while excluding null and malformed values.

data cleaningnull handlingData WranglingRover
Automated Test Strategy for Web AppsHard
Practice
Practice drill

Analyze recent CI test results with CTEs and window functions to identify repeatedly failing automated tests.

automated testingdata accuracyCI/CDIntuit
SQL Query OptimizationMedium
Practice
Practice drill

Optimize a slow PostgreSQL query that aggregates completed transactions while preserving customers with no matching activity.

Performance Tuningdatabase optimizationindexesDDroisysCapgeminiNomura

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3
Execution2 questions · ~17 min
QA Execution ApproachMedium

Assesses your QA execution process and how you ensure quality through planning, testing, and verification.

domain knowledgeCastlight
CI/CD Testing PracticesMedium

Assesses your understanding of CI/CD and how you integrate testing into automated delivery.

CI/CDDevOpsCastlight
4
Behavioral & Leadership2 questions · ~17 min
Scenario-Based QA LeadershipMedium

Evaluates judgment and leadership in ambiguous QA situations.

Castlight
UI Testing and CollaborationMedium

Evaluates your UI QA troubleshooting skills and cross-functional collaboration.

Castlight
The finish line: interview-readyComplete all 6 questions plus 3 hands-on drills to finish this plan.