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Updated weekly · Last refresh Oct 17

Qantas Software Engineer Interview Questions

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

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1
CodingStart here. 11 questions · ~105 min
Two Sum with TargetEasy
Practice

Use a hash map to find two array elements that sum to a target in O(n) time.

Hash TablesArraysStringsQantas
Longest Unique Substring in EnoMedium
Practice

Use a sliding window and hash map to find the longest substring without repeated characters in a string.

Hash TablesStringsTwo PointersQantas
Linked List ReversalEasy
Practice

Reverse a singly linked list in-place using iterative pointer manipulation.

RecursionLinked ListsArraysQantas
Explain Time ComplexityEasy
Practice

Implement a linear array-sum solution and explain why its time complexity is O(n).

CodingMathArraysQantas
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2
Execution8 questions · ~76 min
Handling a Critical Production BugEasy

Describe how you handled discovery, escalation, triage, and containment of a critical bug under release pressure.

Trade-offsSuccess CriteriaRisk AssessmentQantas
Quick Fix vs Long-Term SolutionMedium

Tests your judgment in balancing speed, risk, and sustainable engineering outcomes.

Trade-offsRisk AssessmentScope ManagementQantas
Design a Simple REST APIMedium

Tests your API design skills and your ability to map domain needs to REST endpoints.

Trade-offsRoadmappingScope ManagementQantas
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3
Behavioral & Leadership31 questions · ~295 min
Raising Team Code QualityEasy

Tests how an engineering manager improves code quality and maintainability through ownership, communication, and team standards.

CommunicationLeadershipOwnershipQantas
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