Explain hexagonal architecture in Java and when extra ports and adapters add more complexity than value.
Zomato · 3-4-years · 0 answers
Year not specified · Java, Software Engineering, System Design
System Design interview questions
Explore system design interview questions shared by candidates. Read available community answers and practise for your next interview.
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Questions
Design an append-only audit trail for sensitive changes in a Java product application.
Swiggy · 3-4-years · 0 answers
Year not specified · Java, Authentication & Security, System Design
Explain SQL transaction isolation and choose an approach for inventory reservation under concurrency.
Flipkart · 3-4-years · 0 answers
Year not specified · Java, SQL, System Design
Design a multi-tenant Java application that prevents cross-customer data access.
PhonePe · 3-4-years · 0 answers
Year not specified · Java, Authentication & Security, System Design
Design a Redis caching strategy for a Spring Boot product service, including invalidation and stampede control.
Freshworks · 3-4-years · 0 answers
Year not specified · Java, Redis, System Design
Design a React and Spring Boot checkout flow that safely handles duplicate payment requests.
Zoho · 3-4-years · 0 answers
Year not specified · Java, React, System Design
How would you design a Spring Boot API for a high-traffic product catalog while keeping latency predictable?
Zoho · 3-4-years · 0 answers
Year not specified · Java, Spring Boot, System Design
Explain clean architecture in .NET and identify signs that the abstraction layers have become unnecessary ceremony.
Zomato · 3-4-years · 1 answers
Year not specified · .NET, Software Engineering, System Design
Design an audit trail for sensitive changes that is useful to support teams and resistant to tampering.
Swiggy · 3-4-years · 1 answers
Year not specified · .NET, Authentication & Security, System Design
Explain SQL transaction isolation levels and choose one for an inventory reservation workflow.
Flipkart · 3-4-years · 1 answers
Year not specified · .NET, SQL, System Design
Design a multi-tenant .NET application that prevents one customer from reading another customer’s data.
PhonePe · 3-4-years · 1 answers
Year not specified · .NET, Authentication & Security, System Design
How would you split a modular .NET monolith into microservices without creating a distributed monolith?
Razorpay · 3-4-years · 1 answers
Year not specified · .NET, Microservices, System Design
Design a caching strategy using Redis for a .NET product API, including invalidation and cache-stampede protection.
Freshworks · 3-4-years · 1 answers
Year not specified · .NET, Redis, System Design
Design a React and ASP.NET Core checkout flow that remains safe when a customer submits the same payment twice.
Zoho · 3-4-years · 0 answers
Year not specified · .NET, React, System Design
How would you design an ASP.NET Core API for a high-traffic product catalog while keeping response times predictable?
Zoho · 3-4-years · 0 answers
Year not specified · .NET, ASP.NET Core, System Design
Microservice Patterns – CQRS, Saga, and BFF
EPAM · not-specified · 0 answers
Year not specified · System Design
Distributed System / Kubernetes Cluster Management: You mentioned the travel platform is a distributed system — can you walk me through what that looks like? Do you manage the nodes yourself?
Dodge Construction Network · not-specified · 0 answers
Asked in 2026 · System Design, DevOps
Concurrency Handling — Race Condition Scenario: Can you give me a specific scenario where you handled concurrency — what was the race condition or resource contention you were protecting against?
Dodge Construction Network · not-specified · 0 answers
Asked in 2026 · System Design
CQRS vs a Well-Organized Traditional API: How is CQRS different from a traditional API that's just better organized, with separate read/write logic within a conventional architecture? ↳ Follow-up pressing on whether CQRS provides something a well-structured layered API couldn't achieve on its own.
Dodge Construction Network · not-specified · 0 answers
Asked in 2026 · System Design
Trade-off of Using CQRS: Can you think of a trade-off of using CQRS versus not using it?
Dodge Construction Network · not-specified · 0 answers
Asked in 2026 · System Design