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Prep plan
Updated weekly · Last refresh Aug 30

Eightfold Software Engineer Interview Questions

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

37questions
~5htotal time
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1
CodingStart here. 13 questions · ~108 min
Runtime Complexity Before CodingMedium

Tests ability to reason about time complexity and choose appropriate algorithms.

AlgorithmsEightfold
Depth-First Search ImplementationMedium

Tests implementing graph/tree traversal correctly on non-trivial structures.

dfsData StructuresAlgorithmsEightfold
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2
Execution3 questions · ~25 min
Database Architecture Trade-offsHard

Tests database design judgment for scalability, consistency, and operational complexity.

Trade-offsscalabilitydatabase architectureEightfold
Distributed High AvailabilityHard

Tests designing resilient distributed systems with reliability and performance trade-offs.

performancedistributed systemshigh availabilityEightfold
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3
System Design4 questions · ~33 min
Real-Time Metrics System DesignHard

Tests system design for streaming telemetry, latency, and scalability.

system architectureEightfold
Design MessengerHard

Assesses your end-to-end system design skills including core components and trade-offs.

designEightfold
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4
Behavioral & Leadership15 questions · ~124 min
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5
More topics2 questions · ~17 min
Ranking-Based Document MergingMedium

Assesses your approach to merging data with ranking logic and correctness considerations.

RankingEightfold
JSON Query OptimizationMedium

Tests ability to design and optimize data access patterns for JSON document storage.

optimizationEightfold
Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Sum From 1 to 1,000,000Easy
Practice
Practice drill

Calculate the sum of integers from 1 to 1,000,000 using PostgreSQL aggregation and filtering.

AlgorithmsVirtu Financial
SQL Average Selling PriceMedium
Practice
Practice drill

Calculate weighted average selling prices by product using a date-range join, aggregation, and NULL handling.

leetcodesqlCostarCostar Group
Rank Top Service CategoriesEasy
Practice
Practice drill

Use RANK() and grouped revenue to find ServiceTitan's top three service categories in each region.

RankingperformancesqlServiceTitan
The finish line: interview-readyComplete all 37 questions plus 3 hands-on drills to finish this plan.