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Classdojo Interview Questions

The questions to prepare for Classdojo interviews, across all roles. Questions from real interview reports rank first. Updated weekly.

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1
CodingStart here. 23 questions · ~199 min
Linked List ReversalEasy
Practice

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

RecursionLinked ListsArraysClassdojo
Managing Memory in Mobile AppsMedium

Explain how to prevent leaks, reduce retention, and manage object lifecycles in mobile apps.

Hash TablesStackArraysClassdojo
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2
Execution8 questions · ~69 min
Balance Speed, Quality, and ScopeMedium

Describe how you handled a tough trade-off between shipping fast, maintaining quality, and reducing scope.

Trade-offsRisk AssessmentScope ManagementClassdojo
Choose Monolith or MicroservicesMedium

Evaluate the execution trade-offs between monoliths and microservices and explain how you would choose the right approach.

Trade-offsRisk AssessmentScope ManagementClassdojo
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3
Product Sense3 questions · ~26 min
Approach New Feature DesignMedium

A structured approach for designing a new feature in an existing product, from user need to MVP and success criteria.

Feature PrioritizationUser NeedsUse CasesClassdojo
Prioritize MVP vs Later FeaturesMedium

Decide which features belong in an initial launch versus a later phase.

Feature PrioritizationMVPProduct VisionClassdojo
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4
System Design10 questions · ~87 min
Design a Personalized Product RecommenderHard

Design an end-to-end product recommendation system for a large e-commerce marketplace with strict latency and freshness needs.

Feature StoreFeature DriftModel ServingClassdojo
Design a Cold-Start Feed RankerMedium

Design a personalized feed ranking system that handles new users and new content under tight latency at large scale.

Cold StartFeature StoreRetrievalClassdojo
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5
Behavioral & Leadership6 questions · ~52 min
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