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Updated weekly · Last refresh Aug 30

Mastercard QA Engineer Interview Questions

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

25questions
~4htotal time
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1
CodingStart here. 5 questions · ~44 min
Reverse Sentence With Word OrderEasy
Practice

Reverse word order in an An applied AI annotation sentence while trimming and collapsing whitespace.

string manipulationAlgorithmsMastercard
Extract Unique Domain NamesMedium

Assesses your parsing skills and ability to handle text extraction edge cases.

Data ManipulationMastercard
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2
Execution12 questions · ~105 min
Automated Test Framework DesignMedium

Tests your approach to building maintainable automated testing across UI and API layers.

seleniumautomation frameworktesting toolsMastercard
API Testing and Endpoint ValidationMedium

Assesses your ability to design effective API tests and validate backend behavior.

postmanapi testingMastercard
UI Automation Synchronization StrategyMedium

Evaluates how you make UI automation reliable in the face of dynamic web behavior.

dynamic elementsMastercard
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3
SQL & Data Manipulation3 questions + 3 drills · ~56 min
SQL Joins and Analytics Pipeline ValidationMedium

Evaluates your ability to validate analytics correctness using advanced SQL.

Joinssql queriesdata validationMastercard
Data Consistency Across Mirrored DatabasesMedium

Evaluates your approach to verifying correctness during database migration and replication.

data accuracydata consistencyMastercard
SQL Query for Transaction RecordsMedium

Tests your SQL ability to filter and aggregate data at scale for validation.

sql queryMastercard
Merchant Volume TrendsMedium
Practice
Practice drill

Use a CTE and window functions to calculate daily, cumulative, and three-day moving transaction volumes by Mastercard MCC.

Window FunctionssqlRunning TotalsMastercard
Duplicate Transactions QueryMedium
Practice
Practice drill

Identify near-duplicate Mastercard authorizations with a self-join and rank matching transactions within two minutes.

Self-JoinssqlMastercard
SQL Joins and Window FunctionsMedium
Practice
Practice drill

Join recruiting tables, average interview scores, and rank each Steven Douglas Associates candidate's applications with ROW_NUMBER().

Window FunctionsJoinssql querySteven Douglas Associates
4
Behavioral & Leadership5 questions · ~44 min
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The finish line: interview-readyComplete all 25 questions plus 3 hands-on drills to finish this plan.