Regal Software Engineer Interview Questions

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

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CodingStart here. 5 questions · ~53 min

Longest Common Prefix in StringsEasy

Practice

Find the longest shared starting substring across an array of strings using prefix shrinking.

ArraysStrings

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Maximum Sum Contiguous SubarrayEasy

Practice

Use Kadane's algorithm to find the contiguous subarray with the largest sum in linear time.

Dynamic ProgrammingArraysGreedy

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Three Sum Unique TripletsHard

Practice

Find all unique zero-sum triplets by sorting the array and applying two pointers in O(n²) time.

deduplicationArraysSorting

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Execution3 questions · ~31 min

Postgres vs DynamoDB ChoiceMedium

Tests data modeling judgment and selecting the right persistence technology for workload needs.

Trade-offspostgresqlData Modeling

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Real-Time Notification SystemHard

Tests real-time event handling, reliability, and scalability under high message volume.

design systemthroughputRisk Assessment

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Behavioral & Leadership11 questions · ~116 min

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More topics3 questions · ~31 min

AI as a Coding Force MultiplierMedium

Tests practical, safe use of AI tools to improve engineering productivity and quality.

technical writingproductivityartificial intelligence

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Personalized LLM Customer ResponsesHard

Tests system design for external AI integration, personalization, and safe, scalable message delivery.

Feature StoreModel ServingRecommendation Systems

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Rate Limiting and BackpressureHard

Tests resilience patterns for overload, throughput control, and safe streaming under concurrency.

Stream Processingmonitoring

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