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Updated weekly · Last refresh Oct 17

Digicert Software Engineer Interview Questions

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

27questions
~4htotal time
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1
System DesignStart here. 3 questions · ~24 min
URL Shortener ConcurrencyHard

Design a concurrent URL shortener that safely deletes expired URLs while handling simultaneous reads and writes.

high-frequency requestsdistributed systemsfailure modesDigicert
Previous Project and Architecture Deep DiveMedium

Evaluates your ability to explain architecture clearly and connect it to real project work.

architectureDigicert
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2
Coding10 questions · ~81 min
JavaScript, React, and PerformanceMedium

Assesses practical front-end engineering skills and performance awareness.

javascriptreactperformanceDigicert
What Is an APIEasy

Assesses your foundational understanding of APIs and how they enable software integration.

apiDigicert
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3
Behavioral & Leadership9 questions · ~73 min
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4
More topics5 questions · ~41 min
Frontend State ManagementHard

Explains how to classify frontend state and choose React state-management tools without creating unnecessary global state.

ToolsWeb Platformui frameworksDigicert
Kubernetes Concepts and DifferencesMedium

Evaluates your Kubernetes fundamentals and ability to compare core scheduling and workload concepts.

kubernetesarchitectureDigicert
SQL Query for Second Highest SalaryMedium

Tests SQL windowing or subquery skills for ranking-based data retrieval.

Dynamic ProgrammingsqlDigicert
Optimizing C++ MicroservicesHard

Tests system design and performance optimization for distributed services in production environments.

performance optimizationsystem architecturemicroservicesDigicert
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Clarify and Solve JS Array TaskMedium
Practice
Practice drill

Translate an underspecified array transformation into a precise PostgreSQL result while preserving element order and handling nulls.

javascriptJoinsData ManipulationSamba TV
SQL and Data StructuresMedium
Practice
Practice drill

Aggregate completed PlayStation Store purchases and return accounts with at least two qualifying purchases.

JoinsCTEsData StructuresPlayStation
SQL Data Structure ReviewHard
Practice
Practice drill

Audit PostgreSQL metadata for missing or invalid keys and tables with inefficient sequential-scan patterns.

database optimizationindexesData StructuresMercury
The finish line: interview-readyComplete all 27 questions plus 3 hands-on drills to finish this plan.