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Félix Software Engineer Interview Questions

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

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1
CodingStart here. 24 questions · ~224 min
Reverse a Linked ListEasy
Practice

Reverse a singly linked list in place using pointer manipulation.

RecursionLinked ListsFélix
Longest Subarray Sum Equals KMedium
Practice

Find the longest contiguous subarray whose sum equals K using prefix sums and a hash map.

ArraysFélix
Analyze Time and Space ComplexityEasy

Explain how to derive time and space complexity for a coding solution and justify the final Big O bounds.

Hash TablesArraysSortingFélix
Hash Table vs Binary Search TreeEasy

Compare hash tables and binary search trees by structure, operation costs, ordering, and when each is the better choice.

Hash TablesbstData StructuresFélix
Optimizing Existing Algorithms for PerformanceMedium

Explain how to optimize a slow algorithm by analyzing complexity, bottlenecks, and better data structures or techniques.

Hash TablesArraysGreedyFélix
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2
Behavioral & Leadership24 questions · ~224 min
Explaining Complex Code to TeammatesEasy

Tests technical communication on a team: explaining code clearly, adapting to the audience, and improving collaboration outcomes.

CommunicationtechnicalteamworkFélix
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3
More topics2 questions · ~19 min
System Design for High-Frequency SearchHard

Tests system design skills for low-latency, high-throughput search with scalability and reliability.

scalabilityData StructuressearchFélix
Tell Me About Your BackgroundEasy

Tests your relevant experience and how you position yourself for the Data Analyst role.

Risk AssessmentScope ManagementFélix

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