Cognitiv Software Engineer Interview Questions

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

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CodingStart here. 5 questions · ~46 min

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

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 Pointers

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Execution8 questions · ~73 min

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

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 Management

Cognitiv

Performance Optimization for ScaleMedium

Tests performance engineering skills for large-scale systems and tradeoffs at Cognitiv.

Trade-offsRoadmappingRisk Assessment

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System Design3 questions · ~27 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 Systems

Cognitiv

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 Serving

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Behavioral & Leadership15 questions · ~137 min

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