Dataford
Top 21
Prep plan
Updated weekly · Last refresh Aug 30

Gen Digital Backend Engineer Interview Questions

The questions to prepare for a Gen Digital Backend Engineer interview. Questions from real interview reports rank first. Updated weekly.

21questions
~3htotal time
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1
ExecutionStart here. 3 questions · ~24 min
Applying SOLID in PracticeMedium

Evaluates whether you can translate SOLID into concrete backend design decisions.

software designsolid principlesGen Digital
Debugging Production Leaks and BottlenecksHard

Evaluates your troubleshooting workflow for reliability and performance issues in production.

memory leakDebuggingGen Digital
Refactoring Legacy Code SafelyMedium

Tests your risk management and engineering discipline when changing critical backend systems.

refactoringGen Digital
2
Coding4 questions · ~32 min
Maintainability as Complexity GrowsMedium

Tests long-term engineering practices like refactoring, modularity, and code quality controls.

best practicescode maintainabilityGen Digital
Unit Testing Complex Backend LogicMedium

Evaluates your testing approach for correctness, edge cases, and maintainable test suites.

Gen Digital
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3
System Design3 questions · ~24 min
Redesign for 10x TrafficHard

Assesses your system design skills for scaling backend services under significant load growth.

Gen Digital
Design Pattern Trade-offsMedium

Evaluates your judgment in balancing flexibility, complexity, and maintainability in service design.

Trade-offssystem architecturedesign patternsGen Digital
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4
Behavioral & Leadership10 questions · ~81 min
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5
More topics1 question · ~8 min
Database Trade-Offs for ScaleMedium

Tests your understanding of database architecture choices under load.

Trade-offsdatabase architectureGen Digital
Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Second Highest Salary at NovaTechEasy
Practice
Practice drill

Find the second highest distinct employee salary from a single table, returning NULL if it does not exist.

SubqueriesRankingAggregationsBest BuyAmtex SystemsC3 AI
Second Highest Trader SalaryEasy
Practice
Practice drill

Find the second highest distinct salary from a single table using basic PostgreSQL ordering and limiting.

SubqueriesRankingSortingeClinicalWorksInformaticaSpectraforce Technologies
Second Highest Without AggregatesHard
Practice
Practice drill

Find the second highest salary in each department without using aggregate functions.

SubqueriesRankingSelf-JoinsCredit GenieDevoteamCisco Restaurant + Bar
The finish line: interview-readyComplete all 21 questions plus 3 hands-on drills to finish this plan.