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Blockchain Interview Questions

The questions to prepare for Blockchain interviews, across all roles. Questions from real interview reports rank first. Updated daily.

50questions
~7htotal time
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1
Finance & AccountingStart here. 12 questions · ~97 min
Month-End Close ProcessHard

Explain a controlled month-end close, including reconciliations, accruals, variance analysis, review, and GAAP financial statement completion.

Accounting FundamentalsFinancial Statementsfinancial processesBBlockchain
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2
Execution3 questions · ~24 min
Plan and Execute Team RoadmapMedium

Explain how you build and execute a team roadmap while balancing priorities, scope, and stakeholder expectations.

Success CriteriaRoadmappingScope ManagementBBlockchain
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3
Statistics & Probability4 questions · ~32 min
Probability of HeadsEasy

Calculate the probability of observing at least two heads in three independent fair-coin tosses using the binomial distribution.

Distributionsstatistics fundamentalsprobabilityBBlockchain
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4
System Design3 questions · ~24 min
Design Trading or Messaging System for BlockchainHard

Assesses system design skills for end-to-end financial workflows within Blockchain’s product landscape.

system integrationdesignBBlockchain
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5
Technical Fundamentals11 questions · ~89 min
Cache Line and PerformanceMedium

Tests knowledge of low-level architecture implications on software performance.

performanceBBlockchain
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6
Metrics4 questions · ~32 min
Accuracy in Repetitive TasksMedium

Evaluates focus and quality control for routine tasks in a high-growth crypto company.

Accuracyattention to detailBBlockchain
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7
More topics13 questions · ~105 min
Explain ACID in Transaction SystemsEasy

Explain the four ACID properties and why they matter for reliable transaction processing in SQL systems.

acid propertiestransactionsdata integrityBBlockchain
Pitch a Trade at BlockchainMedium

Evaluates ability to construct a trade idea and articulate rationale and risk management.

Risk AssessmentBBlockchain
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
SQL Data Structure ReviewHard
Practice
Practice drill

Audit PostgreSQL metadata for missing or invalid keys and tables with inefficient sequential-scan patterns.

database optimizationindexesData StructuresMercury
Data Analysis and Revenue LeakageMedium
Practice
Practice drill

Identify booking-level revenue leakages by comparing expected revenue with settled charges.

revenue recognitionfinancial dataData AnalysisRoyal Caribbean Group
SQL, DSA, and Trees/DPMedium
Practice
Practice drill

Summarize interview topics by active question coverage, average time, and readiness status.

JoinsProblem SolvingData StructuresZoom Video Communications
The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.