Dataford
Top 14
Prep plan
Updated weekly · Last refresh Sep 25

Persistent QA Engineer Interview Questions

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

14questions
~2htotal time
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1
CodingStart here. 3 questions · ~25 min
String or Array Coding SnippetMedium

Evaluates problem-solving skills and ability to implement correct string or array logic.

coding challengestring manipulationArray ManipulationPersistent
OOP Concepts for QAMedium

Evaluates core programming knowledge relevant to writing maintainable QA automation code.

oopPersistent
Java Collections for AutomationMedium

Assesses ability to apply Java data structures in QA automation.

javacollectionsPersistent
2
Behavioral & Leadership8 questions · ~66 min
Reporting and DashboardsMedium

Assesses communication and metrics reporting for stakeholders.

dashboardsreportingPersistent
QA Roles and ResponsibilitiesMedium

Evaluates ownership, scope, and clarity of QA responsibilities.

responsibilitiesPersistent
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3
More topics3 questions · ~25 min
SQL for Database ValidationEasy

Explain how SQL is used to validate database quality through row counts, null checks, duplicates, and aggregate comparisons.

JoinsData WranglingAggregationsPersistent
Jenkins and Maven WorkflowMedium

Evaluates CI/CD understanding for running QA automation reliably.

Persistent
Validation vs VerificationMedium

Assesses understanding of core QA concepts and test intent.

validationPersistent

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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
SQL Query OptimizationMedium
Practice
Recently asked
Practice drill

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

Performance Tuningdatabase optimizationindexesDDroisysCapgeminiNomura
Second-Highest Per CustomerMedium
Practice
Recently asked
Practice drill

Use a window function to find each customer's second-highest transaction amount for a specified month.

Window FunctionsDate FunctionsData ManipulationPersistent
SQL Query: Highest SalaryEasy
Practice
Recently asked
Practice drill

Return the highest non-NULL salary from the employees table using a simple aggregate.

aggregationsqlAggregationsPersistent
The finish line: interview-readyComplete all 14 questions plus 3 hands-on drills to finish this plan.