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100 RESTful Web Services Interview Questions and Answers

Web & Backend · 100 questions, each with a full written answer — free, no sign-up.

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Basic 20Intermediate 20Advanced 20Expert 20Guru 20

Basic

  1. What is a RESTful web service?
  2. What are the benefits of using RESTful web services over SOAP web services?
  3. What are the HTTP methods commonly used in RESTful web services?
  4. What is the difference between PUT and POST methods?
  5. How do you handle errors in RESTful web services?
  6. What is the role of HTTP status codes in RESTful web services?
  7. What is the difference between @PathParam and @QueryParam annotations in JAX-RS?
  8. What is a resource in RESTful web services?
  9. What is the difference between a URI and a URL in RESTful web services?
  10. What is HATEOAS and how does it relate to RESTful web services?
  11. How do you implement versioning in RESTful web services?
  12. What is the difference between synchronous and asynchronous communication in RESTful web services?
  13. What is JSON and how is it used in RESTful web services?
  14. What is XML and how is it used in RESTful web services?
  15. What is the difference between a client and a server in RESTful web services?
  16. How do you handle security in RESTful web services?
  17. What is CORS and how does it relate to RESTful web services?
  18. What is caching and how is it used in RESTful web services?
  19. What is the difference between stateful and stateless communication in RESTful web services?
  20. What is a microservice and how does it relate to RESTful web services?

Intermediate

  1. What are the key principles of RESTful web services?
  2. What is the difference between a URI and a URL in RESTful web services?
  3. How do you handle transactions in RESTful web services?
  4. What is the role of filters and interceptors in RESTful web services?
  5. What is the difference between JAXB and Jackson in RESTful web services?
  6. How do you handle file uploads in RESTful web services?
  7. What is the difference between SOAP and RESTful web services in terms of performance?
  8. What is the difference between synchronous and asynchronous communication in RESTful web services?
  9. What are the best practices for designing RESTful web services?
  10. What is the role of HTTP headers in RESTful web services?
  11. What is the difference between JSON and XML in RESTful web services?
  12. How do you handle authentication and authorization in RESTful web services?
  13. What is the difference between JAX-RS and Spring MVC in RESTful web services?
  14. What is the difference between a singleton and a prototype scope in Spring?
  15. How do you handle pagination in RESTful web services?
  16. What is the difference between a GET request and a POST request in RESTful web services?
  17. What is the role of dependency injection in RESTful web services?
  18. What is the difference between a monolithic architecture and a microservices architecture?
  19. What is the role of API gateways in microservices architecture?
  20. What is the difference between a stateless and stateful microservice?

Advanced

  1. What is the difference between a RESTful web service and a RESTful API?
  2. What is Hystrix and how is it used in microservices architecture?
  3. How do you handle data consistency across multiple microservices?
  4. What is circuit breaking and how is it used in microservices architecture?
  5. What is the difference between a synchronous and an asynchronous API in RESTful web services?
  6. What is the role of Swagger in RESTful web services?
  7. What is the role of Eureka in microservices architecture?
  8. What is the difference between a container and a virtual machine in microservices architecture?
  9. How do you handle distributed transactions in microservices architecture?
  10. What is the role of load balancing in microservices architecture?
  11. What is the difference between REST and SOAP in terms of security?
  12. What is the difference between a stateless and a stateful session in web applications?
  13. What is the role of OAuth2 in RESTful web services?
  14. What is the role of the Service Registry in microservices architecture?
  15. What is the difference between a horizontal and a vertical scaling in microservices architecture?
  16. What is the role of Docker in microservices architecture?
  17. What is the difference between a synchronous and an asynchronous messaging system in microservices architecture?
  18. What is the role of the Config Server in microservices architecture?
  19. What is the difference between a distributed monolith and a true microservices architecture?
  20. How do you handle testing in microservices architecture?

Expert

  1. What is the role of Kafka in microservices architecture?
  2. What is the difference between a message queue and a message broker in microservices architecture?
  3. How do you handle long-running transactions in microservices architecture?
  4. What is the role of Zookeeper in microservices architecture?
  5. What is the difference between a container orchestration tool and a configuration management tool?
  6. What is the role of Kubernetes in microservices architecture?
  7. How do you handle service discovery in microservices architecture?
  8. What is the difference between a stateful and a stateless microservice in terms of data storage?
  9. How do you handle data partitioning in microservices architecture?
  10. What is the difference between a service mesh and an API gateway in microservices architecture?
  11. What is the role of Istio in microservices architecture?
  12. How do you handle database migrations in microservices architecture?
  13. What is the role of the Sidecar pattern in microservices architecture?
  14. What is the difference between an API-first and a code-first approach in designing RESTful web services?
  15. What is the role of resilience testing in microservices architecture?
  16. What is the difference between a CQRS architecture and an event sourcing architecture in microservices?
  17. What is the role of NATS in microservices architecture?
  18. How do you handle versioning in a microservices architecture?
  19. What is the difference between a reverse proxy and a load balancer in microservices architecture?
  20. What is the role of Grafana in monitoring microservices architecture?

Guru

  1. What is the role of domain-driven design in microservices architecture?
  2. How do you handle failure in microservices architecture?
  3. What is the role of observability in microservices architecture?
  4. What is the difference between a microkernel architecture and a microservices architecture?
  5. How do you handle service mesh upgrades in microservices architecture?
  6. What is the difference between a stateless and a stateful API in microservices architecture?
  7. What is the role of GraphQL in microservices architecture?
  8. What is the role of a distributed tracing system in microservices architecture?
  9. What is the difference between a reactive and a non-reactive microservices architecture?
  10. How do you handle schema evolution in microservices architecture?
  11. What is the role of a canary release in microservices architecture?
  12. What is the difference between a blue-green deployment and a rolling deployment in microservices architecture?
  13. What is the role of a chaos engineering tool in microservices architecture?
  14. What is the difference between a gateway and a router in microservices architecture?
  15. What is the role of a container registry in microservices architecture?
  16. What is the difference between an edge computing architecture and a cloud-native architecture?
  17. What is the role of serverless computing in microservices architecture?
  18. How do you handle data consistency in a distributed system?
  19. What is the role of a distributed file system in microservices architecture?
  20. What is the role of machine learning in microservices architecture?
📕 Buy this interview preparation book: 100 RESTful Web Services questions & answers — PDF + EPUB for $5
Reading is step one. Saying it out loud is the interview. Our AI interviewer calls your phone and runs a realistic RESTful Web Services interview — then scores it.
📞 Practice RESTful Web Services — free 15 min
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