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Updated weekly · Last refresh Oct 14

Deloitte Full Stack Engineer Interview Questions

The questions to prepare for a Deloitte Full Stack Engineer interview. Questions from real interview reports rank first. Updated daily.

28questions
~6htotal time
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1
CodingStart here. 6 questions · ~75 min
Custom .NET Core MiddlewareMedium
Practice

Implement middleware behavior that authorizes API requests, propagates correlation IDs, and handles downstream failures.

clean codeapiedge casesDeloitte
Triangle Print ProgramEasy
Practice

Arrange a sequence into rows of increasing length and return the formatted number triangle.

ArraysArray ManipulationAlgorithmsDeloitte
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2
System Design6 questions · ~75 min
Monolith vs MicroserviceHard

Explain monolithic versus microservice architecture and identify where latency occurs during API requests.

latencyapi gatewayarchitecture patternsDeloitte
API-First AdvantageMedium

Explain how API-first design improves consistency, collaboration, reuse, governance, and integration across systems.

backend integrationapi gatewayarchitecture patternsDeloitte
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3
Execution4 questions · ~50 min
Handling Deployment IssuesMedium

Explain how to respond to faulty deployed code and describe the role of CI/CD in preventing recurrence.

automated testingCI/CDdeploymentDeloitte
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4
Technical Fundamentals8 questions · ~100 min
Explain Collections vs Streams in JavaMedium
Recently asked

Compare Java Collection storage and traversal with Stream pipeline processing, including laziness, reuse, memory, and parallel execution.

javaLanguage Featurestechnical fundamentalsDeloitte
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5
More topics4 questions · ~50 min
Fetch Last 5 RecordsEasy
Practice

Return the five most recently inserted records using timestamp ordering with a deterministic ID tie-breaker.

data accuracydatabase queryingdata extractionDeloitte
MVC API on Table DataMedium
Practice

Prepare active page data for an MVC API route, including click totals and pages with no clicks.

null handlingJoinsAggregationsDeloitte
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Hands-on SQL practiceWrite and run real queries in the editor. 1 drill · ~10 min
7th Nearest Palindrome CodingHard
Practice
Recently asked
Practice drill

Return the seventh closest palindrome for each valid input number, using recursive query logic and ordered ranking.

Dynamic ProgrammingCTEscomplex queriesDeloitte
The finish line: interview-readyComplete all 28 questions plus 1 hands-on drill to finish this plan.