Top 28
Prep plan
Updated weekly · Last refresh Oct 17

Cognitiv Software Engineer Interview Questions

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

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1
CodingStart here. 4 questions · ~37 min
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 PointersCognitiv
Linked List ReversalEasy
Practice

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

RecursionLinked ListsArraysCognitiv
Matrix Traversal CodingMedium

Tests your approach to implementing and reasoning about algorithms for matrix traversal.

AlgorithmsCognitiv
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2
Execution7 questions · ~65 min
Design a Scalable New ServiceMedium

Plan the launch of a new service by defining scope, sequencing trade-offs, and de-risking scale before build starts.

Trade-offsRoadmappingRisk AssessmentCognitiv
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 ManagementCognitiv
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3
Behavioral & Leadership14 questions · ~129 min
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4
More topics3 questions · ~28 min
Design a Personalized Recommendation RankerHard

Design a personalized recommendation system that turns user preferences into ranked suggestions with retrieval, ranking, and feedback loops.

RetrievalTwo-Tower ModelsRecommendation SystemsCognitiv
Big Data Performance OptimizationHard

Tests performance tuning and architecture choices for big data workloads at Cognitiv.

InfrastructureBatch ProcessingQualityCognitiv
Design a Real-Time ML Feature StoreHard

Design a shared feature store for training and low-latency inference across many ML systems with strict freshness and consistency needs.

Feature StoreFeature DriftModel ServingCognitiv
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