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ETS Software Engineer Interview Questions

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

35questions
~5htotal time
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1
CodingStart here. 11 questions · ~90 min
Optimizing a Slow ApplicationMedium

Tests performance troubleshooting, measurement, and targeted optimization strategies.

Hash TablesArraysSortingETS
Linked Lists vs ArraysEasy

Compare arrays and linked lists by memory layout, access cost, and update performance, and explain when each is the better choice.

Linked ListsArraysSearchingETS
Queue Using Linked ListsMedium

Tests data structure implementation skills and ability to reason about time and space complexity.

QueueLinked ListsETS
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2
Execution5 questions · ~41 min
Handling Performance IssuesHard

Tests structured performance investigation, mitigation, and validation of improvements in production.

Trade-offsSuccess CriteriaRisk AssessmentETS
Ensuring Code QualityEasy

Tests engineering practices for maintainability, correctness, and reliability through testing and reviews.

Success CriteriaRisk AssessmentQualityETS
Resolving User-Reported BugsMedium

Tests bug triage, reproduction, root-cause analysis, and verification before release.

Success CriteriaRisk AssessmentQualityETS
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3
Behavioral & Leadership17 questions · ~139 min
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4
More topics2 questions · ~16 min
Designing User AuthenticationHard

Tests secure authentication design, threat awareness, and practical implementation choices for user access.

InfrastructureToolsQualityETS
Multithreading ConceptsMedium

Tests understanding of concurrency, performance implications, and correctness concerns in software systems.

InfrastructureToolsETS

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