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Updated weekly · Last refresh Oct 6

Coalition Greenwich Full Stack Engineer Interview Questions

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

21questions
~3htotal time
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1
Technical FundamentalsStart here. 16 questions · ~128 min
Angular Interceptors ConceptMedium

Evaluates understanding of Angular interceptors and their purposes.

httpCoalition Greenwich
Spring Boot Request LifecycleMedium

Tests understanding of Spring Boot request flow and component roles.

architecturespring bootCoalition Greenwich
Testing Interfaces with JUnitMedium

Assesses unit testing techniques for interfaces and abstractions.

TestingCoalition Greenwich
Observables and Subscriptions in Reactive ProgrammingMedium

Evaluates grasp of reactive paradigms and stream handling.

Coalition Greenwich
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2
System Design4 questions · ~32 min
Microservices Communication PatternsMedium

Assesses understanding of microservices communication options and patterns.

CommunicationarchitecturemicroservicesCoalition Greenwich
Scaling: Horizontal vs VerticalMedium

Evaluates reasoning about scaling architectures and cost/performance implications.

Trade-offsscalingarchitectureCoalition Greenwich
API Security with JWTMedium

Tests practical knowledge of token-based authentication and security considerations.

authenticationjwtapi securityCoalition Greenwich
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3
More topics1 question · ~8 min
Normalization vs Denormalization TradeoffsMedium

Explain normalization, why it improves data integrity, and when denormalization is a practical performance tradeoff.

schema designperformanceData ModelingCoalition Greenwich

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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Second Highest Without AggregatesHard
Practice
Practice drill

Find the second highest salary in each department without using aggregate functions.

SubqueriesRankingSelf-JoinsCredit GenieDevoteamCisco Restaurant + Bar
SQL for Top CustomersEasy
Practice
Practice drill

Use a CTE, join, date filter, and aggregation to find the top 10 Coalition Greenwich customers by Q1 revenue.

sql queryCoalition Greenwich
Optimize SQL QueriesMedium
Practice
Practice drill

Optimize a PostgreSQL aggregation query by filtering early, reducing rows before joins, and returning qualifying active customers.

database optimizationperformanceindexesSofteamSSoftware Medical InformaticsGlassdoor
The finish line: interview-readyComplete all 21 questions plus 3 hands-on drills to finish this plan.