Top 25
Prep plan
Updated weekly · Last refresh Aug 30

Product & Design Software Engineer Interview Questions

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

25questions
~4htotal time
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1
CodingStart here. 10 questions · ~102 min
Detect Cycle in Linked ListEasy
Practice

Use Floyd’s two-pointer algorithm to determine whether a singly linked list contains a cycle.

Hash TablesLinked ListsTwo PointersProduct & Design
Reverse String In PlaceEasy
Practice

Reverse a string using a two-pointer approach by converting it to a mutable character list in Python.

CodingStringsProgrammingProduct & Design
Maximum Subarray Using KadaneEasy
Practice

Compute the maximum contiguous subarray sum in O(n) time using Kadane's Algorithm.

Basic AlgorithmsDynamic ProgrammingArraysProduct & Design
Choosing Abstract Classes vs InterfacesMedium

Tests design judgment for extensibility and maintainability in game codebases.

oopProduct & Design
Leaderboard Data Structure and ComplexityMedium

Tests data structure selection and performance analysis for game leaderboards.

time complexityData StructuresHeapProduct & Design
Classes vs Structs in C#Medium

Tests understanding of C# types and their implications for memory and performance.

memory managementoopProduct & Design
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2
Behavioral & Leadership14 questions · ~143 min
Owning a High-Stakes Production BugEasy

Tests ownership in debugging, structured root-cause analysis, and clear communication during a production issue.

CommunicationOwnershipProduct & Design
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3
More topics1 question · ~10 min
Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
The finish line: interview-readyComplete all 25 questions plus 3 hands-on drills to finish this plan.