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Updated weekly · Last refresh Sep 25

Prolific Software Engineer Interview Questions

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

32questions
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1
ExecutionStart here. 6 questions · ~48 min
Debugging With Limited ObservabilityMedium

Tests incident debugging approach under constrained observability.

observabilityDebuggingProlific
Troubleshooting Production PerformanceMedium

Assesses production troubleshooting and performance analysis skills.

performance optimizationTroubleshootingproductionProlific
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2
System Design7 questions · ~56 min
Evolving NoSQL Data ModelsMedium

Evaluates data modeling decisions for change-tolerant NoSQL systems.

nosqlData ModelingProlific
Real-Time Notification System DesignHard

Evaluates event-driven system design for real-time user-facing updates.

real-time updatesnotification systemProlific
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3
Behavioral & Leadership15 questions · ~121 min
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4
More topics4 questions · ~32 min
Optimizing Slow PostgreSQL Production QueriesHard

Explain how to diagnose slow PostgreSQL queries in production and choose effective indexing strategies.

Performance Tuningindexesquery optimizationProlific
Algorithm With Complexity ExplanationMedium

Tests ability to implement algorithms and reason about complexity.

space complexitytime complexityProlific
Race Conditions in Python ConcurrencyHard

Assesses concurrency debugging and mitigation strategies.

pythonconcurrencyProlific
SQL vs NoSQL for Go-to-Market DataEasy

Explain how SQL and NoSQL differ in schema, consistency, scaling, and Demandbase-style analytics use cases.

JoinsData WranglingProlific

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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
SQL to Find Operational InefficiencyMedium
Practice
Practice drill

Identify Revolut merchants with high payment failure rates and report related support-resolution metrics.

Joinsbusiness problemsqlRevolut
Data Modeling in Oracle or SnowflakeMedium
Practice
Practice drill

Demonstrate data modeling and PostgreSQL performance practices by summarizing posted account activity for active accounts.

database optimizationperformance optimizationdatabase designJPMorganChase
Analytics Data Model DesignHard
Practice
Practice drill

Demonstrate an analytics model by summarizing product usage from fact and dimension tables with joins and aggregation.

fact tablesData Wranglingdatabase designAutodesk
The finish line: interview-readyComplete all 32 questions plus 3 hands-on drills to finish this plan.