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Updated weekly · Last refresh Oct 17

Compass Software Engineer Interview Questions

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

50questions
~8htotal time
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1
CodingStart here. 15 questions · ~146 min
Course Schedule Interval MinimizationHard
Practice

Use topological sorting to compute the minimum number of rounds needed to finish all courses with prerequisites.

coding challengebfsAlgorithmsCompass
Basic Calculator VariationsHard
Practice

Parse and evaluate arithmetic expressions with parentheses, operator precedence, and optional variable substitution.

coding challengeBasic AlgorithmsDynamic ProgrammingCompass
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2
System Design15 questions · ~146 min
Transaction System Like AmazonHard

Design a transaction system for Amazon-style shopping with low latency, correctness, and fraud-aware decisioning.

ML RankinglatencyFeature StoreCompass
Task Allocation With ConcurrencyHard

Design a task allocation system that assigns work safely under concurrent requests and prevents double assignment.

Feature Storedistributed systemsfailure modesCompass
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3
Security & Infrastructure13 questions · ~126 min
URI vs Query ParametersMedium

Assesses URL structure knowledge and API request parameter handling.

Compass
REST Status CodesMedium

Evaluates HTTP status code knowledge and error interpretation.

restCompass
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4
Behavioral & Leadership4 questions · ~39 min
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5
More topics3 questions · ~29 min
AI Round on Forms MatchingMedium

Assesses ability to reason about AI/ML-style matching problems and practical implementation thinking.

AICompass
Create Color-Coded Table From ObjectsMedium

Evaluates your ability to translate data models into a correct, presentation-ready tabular structure.

data visualizationCompass
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Handling Missing DataEasy
Practice
Practice drill

Replace missing sales fields with defined defaults and return a consistently ordered dataset.

missing valuesdata cleaningnull handlingUniversity of MinnesotaThe Home DepotNationwide
Top Customers by Sales RevenueEasy
Practice
Practice drill

Use GROUP BY and SUM to rank the top 10 customers by total revenue from a single sales table.

RankingGroup ByAggregationsHousecall ProEquifaxXYZ
Optimizing a Slow QueryMedium
Practice
Practice drill

Rewrite a slow PostgreSQL reporting query to reduce scanned rows, avoid join multiplication, and return accurate monthly site metrics.

Subqueriesdatabase optimizationJoinsContinental FinanceCapgeminiDISH
The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.