Top 49
Prep plan
Updated weekly · Last refresh Aug 30

Brain Software Engineer Interview Questions

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

49questions
~7htotal time
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1
CodingStart here. 23 questions · ~211 min
Linked List ReversalEasy
Practice

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

RecursionLinked ListsArraysBrain
Two Sum with TargetEasy
Practice

Use a hash map to find two array elements that sum to a target in O(n) time.

Hash TablesArraysStringsBrain
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2
System Design7 questions · ~64 min
Building Robotic FiltersHard

Assesses signal-processing and robotics filtering design and validation approach.

Brain
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3
Behavioral & Leadership13 questions · ~119 min
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4
More topics6 questions · ~55 min
Optimizing a Slow QueryHard

Tests query tuning skills, indexing strategy, and diagnosing performance bottlenecks.

SubqueriesJoinsAggregationsBrain
Real-Time Data Processing SystemHard

Tests your ability to design low-latency pipelines and ingestion-to-consumption architecture.

InfrastructureStream ProcessingOrchestrationBrain
Debugging a Production IssueMedium

Tests your incident triage process, hypothesis-driven debugging, and communication during outages.

Rollback PlanTrade-offsRisk AssessmentBrain
Closed-Loop Feedback and ActuatorsMedium

Evaluates control-system understanding and actuator selection knowledge.

Brain
High Availability and Fault ToleranceHard

Tests your ability to design for resilience, recovery, and continuous operation.

Trade-offsSuccess CriteriaRisk AssessmentBrain
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
The finish line: interview-readyComplete all 49 questions plus 3 hands-on drills to finish this plan.