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Qantas Software Engineer Interview Questions

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

50questions
~8htotal time
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1
CodingStart here. 11 questions · ~101 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

Tests ability to analyze algorithm efficiency and communicate tradeoffs.

MathArraysQantas
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2
Execution8 questions · ~74 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
Maintainable Code PracticesMedium

Tests engineering practices that improve readability, testing, and long-term ownership.

Trade-offsSuccess CriteriaScope ManagementQantas
Improve Application PerformanceMedium

Tests your approach to diagnosing bottlenecks and improving performance under real constraints.

Trade-offsRisk AssessmentScope ManagementQantas
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3
Behavioral & Leadership31 questions · ~286 min
Responding to Critical FeedbackEasy

Tests how you receive criticism, regulate defensiveness, act on feedback, and turn it into measurable improvement.

resiliencefeedbackcoachabilityQantas
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The finish line: interview-readyComplete all 50 questions to finish this plan.