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Updated weekly · Last refresh Oct 17

Digicert Data Engineer Interview Questions

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

15questions
~2htotal time
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1
CodingStart here. 10 questions · ~80 min
SQL and Python Data EngineeringMedium

Assesses your ability to implement data engineering solutions using SQL and Python.

data engineeringsqlpythonDigicert
Fault-Tolerant Data Pipeline DesignHard

Tests your ability to architect reliable, scalable pipelines with resilience and operational readiness.

data pipelinescalabilityfault toleranceDigicert
CDC for NoSQL DataMedium

Tests your ability to design reliable change ingestion for NoSQL sources with ordering and replay concerns.

nosqldata handlingDigicert
Control Compute CostsHard

Tests your ability to optimize performance and cost tradeoffs in production data workloads.

performanceresource managementDigicert
CI/CD for Data EngineeringMedium

Tests your ability to productionize data engineering changes with testing, automation, and safe deployments.

CI/CDAutomationDigicert
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2
Behavioral & Leadership3 questions · ~24 min
Root Cause Analysis for Pipeline FailuresMedium

Tests your troubleshooting process, ownership, and ability to prevent recurrence.

data pipelineroot cause analysisProblem SolvingDigicert
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3
More topics2 questions · ~16 min
Optimizing SQL Query PerformanceMedium

Tests your SQL tuning skills, including execution plans, indexing, and query rewrites.

performancequery optimizationsqlDigicert
Spark and PySpark at ScaleMedium

Tests your hands-on experience with distributed processing and performance considerations.

pysparksparkDigicert

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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Optimize Slow Query or PipelineMedium
Practice
Practice drill

Optimize a PostgreSQL aggregation pipeline by filtering early, reducing join volume, and returning the highest-value active accounts.

data pipelinedatabase optimizationJoinsApple
Optimizing Poorly Performing SQLHard
Practice
Practice drill

Optimize a PostgreSQL reporting query by reducing scanned rows, preserving unmatched records, and selecting the latest related review efficiently.

database optimizationlarge datasetsperformancePPriority Technology Holdings, LLCZillowOne
Optimize SQL QueriesMedium
Practice
Practice drill

Optimize a PostgreSQL aggregation query by filtering early, reducing rows before joins, and returning qualifying active customers.

database optimizationperformanceindexesSofteamSSoftware Medical InformaticsGlassdoor
The finish line: interview-readyComplete all 15 questions plus 3 hands-on drills to finish this plan.