Top 25 Microservices Interview Questions and Answers in 2025

Here’s a comprehensive list of the Top 25 Microservices Interview Questions and Answers for 2025. These cover foundational concepts, architecture, communication, deployment, scalability, and security — all tailored to current best practices and industry trends.

1. What are microservices?

Answer:
Microservices is an architectural style where a large application is broken into smaller, loosely coupled services that can be developed, deployed, and scaled independently.

2. What are the key characteristics of microservices?

Answer:

• Decentralized data management
• Independently deployable services
• Domain-driven design
• Lightweight communication (e.g., REST, gRPC)
• Fault isolation
• Continuous delivery-friendly

3. How do microservices differ from monolithic architecture?

Answer:

• Monolith: Single codebase, tightly coupled components, difficult to scale.
• Microservices: Multiple services, loosely coupled…