Top 50
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Updated weekly · Last refresh Oct 17

Illumina Software Engineer Interview Questions

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

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1
CodingStart here. 13 questions · ~137 min
Coding: Values of AlphabetEasy
Practice
Recently asked

Find the maximum sum of k values in an array using sorting or a size-k min-heap.

Data StructuresAlgorithmsIllumina
Live Coding: Reverse and Reverse ComplementMedium
Practice
Recently asked

Reverse a DNA sequence and replace each nucleotide with its complement using slicing and character translation.

coding challengestring manipulationArray ManipulationIllumina
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2
Execution12 questions · ~126 min
Choose Monolith or MicroservicesMedium
Recently asked

Evaluate the execution trade-offs between monoliths and microservices and explain how you would choose the right approach.

Trade-offsRisk AssessmentScope ManagementIllumina
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3
Technical Fundamentals9 questions · ~95 min
Explain the NGS ProcessMedium
Recently asked

Evaluates depth of understanding of NGS workflows and related hardware concepts.

Communicationtechnical knowledgeIllumina
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4
System Design6 questions · ~63 min
Solve a Visually Different ProblemMedium
Recently asked

Tests structured problem solving and ability to adapt to a visually different product context.

product designProblem SolvingIllumina
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5
Security & Infrastructure4 questions · ~42 min
Cross-Site Scripting MitigationMedium
Recently asked

Assesses your web security knowledge and ability to mitigate XSS risks.

xssSecurityIllumina
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6
Behavioral & Leadership3 questions · ~32 min
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7
More topics3 questions · ~32 min
Handling Missing Data in PipelinesMedium
Recently asked

Approach for handling missing data in an ML data pipeline, including validation, imputation, and safe downstream consumption.

InfrastructureETLBatch ProcessingIllumina
Analyze Two Sets of DataMedium
Recently asked

Assesses data analysis approach and ability to compare datasets effectively.

Data AnalysiscomparisonIllumina
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.