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Top 50 design decisions Interview Questions

The most frequently asked design decisions questions across all roles and companies, ranked by real interview frequency. Updated daily.

50questions
~7htotal time
59companies covered
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1
CodingStart here. 3 questions · ~25 min
2
Execution14 questions · ~117 min
Explain Design DecisionHard

Explain the reasoning, trade-offs, stakeholder input, and outcome behind a significant design decision.

design trade-offsdesign processdesign decisionsOptumIIBM iXCChange Frontier
Constraints and InfluenceMedium

Explain how major project constraints shaped your design decisions, priorities, and execution approach.

Trade-offsdesign trade-offsdesign processKikoffSSeismicGoogle
Walk Through Home TaskMedium
Recently asked

Explain your home task decisions, trade-offs, delivery approach, and improvements you would make with additional time.

Trade-offsdesign trade-offsClarityRevolut
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3
Behavioral & Leadership19 questions · ~159 min
Explain Research Design DecisionsMedium
Recently asked

Tests analytical judgment and communication when defending research methods, assumptions, trade-offs, and conclusions to stakeholders.

analytical skillsaudience analysisresearchMetaMeta Logistics
Defending a Key Design DecisionEasy

Tests how you explain past design decisions, balance user needs with stakeholder input, and show measurable impact.

technical experienceself introductiondesign decisionsJJohn Lewis & PartnersPalo Alto Networks
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4
System Design5 questions · ~42 min
Microservices vs MonolithMedium

Tests architectural decision-making for system design.

design decisionsmicroservicesVSolvit
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5
Product Sense4 questions · ~34 min
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6
More topics5 questions · ~42 min
Describe the architecture of a project you are proud ofHard

Explain a project architecture, including its layers, dependency direction, state ownership, testability, and key design trade-offs.

TestabilityLayered Architecturetechnical experienceEEnGen GlobalHHighRes BiosolutionsDDynamic Planner
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