Microservices - Level II

Practice 45 Microservices - Level II interview questions with detailed answers. Part of the Microservices track on Java Interview Hub.

• What is the disadvantage of microservices? What are the ways to address it?
• How would you call another service in the microservice architecture?
• Explain a few microservices design patterns that you are aware of.
• What is a circuit breaker, and why is it implemented in a microservice architecture?
• You're converting a monolithic application into microservices using Spring Boot. Describe the steps involved and the challenges you might face.
• How does Spring Cloud enhance microservices development in Spring Boot?
• You are tasked with creating a microservices architecture that requires service-to-service communication. How would Spring Cloud assist in this setup?
• How do you address the issue of data consistency across microservices?
• Let's say you are working on a microservices application and you have to use either database per service or shared database so which do you prefer and why?
• How do you implement tracing in a microservices architecture?
• How can you track the flow of requests across multiple microservices?
• What are the components of a typical Spring Cloud architecture for microservices?
• Describe the integration process of a messaging service like Kafka with a Spring Boot application.
• How do different services communicate with each other in a microservice architecture?
• What are the trade-offs of using synchronous vs. asynchronous communication between services?
• How is communication secured in communication between microservices?
• What challenges have you faced when developing or managing microservices, and how did you address them?
• What are the key benefits of microservices architecture over monolithic architecture?
• Scenario: You are designing a microservices architecture and need to ensure that service failures do not affect the entire system. What strategies would you implement?
• What is the difference between Docker and Kubernetes?
• If you were tasked with deploying a microservices application, how would you decide whether to use Docker, Kubernetes, or both in your architecture?
• How would you handle distributed transactions in a microservices architecture? Explain the concept of the Saga pattern.
• In a microservices architecture, if a step in your Saga fails, how would you ensure data consistency across all services involved? Can you provide a specific example of a compensation action?
• Describe how you dockerized a Spring Boot application. What were the steps, challenges, and benefits of moving to a containerized environment?
• What do you understand by the term "service-oriented architecture"?
• What are some challenges you have faced while working with microservices?
• What security practices do you consider when developing microservices?
• Are you familiar with any tools for monitoring the health and performance of microservices?
• How would you handle the scenario where Kafka messages need to be consumed by multiple different services, each requiring different handling logic?
• You need to integrate Kafka to handle real-time notifications in a social media application built with Spring Boot. How would you set up and configure this integration?
• Name two service discovery which you have implemented in your spring boot microservice application? Is there any configuration needs to be added to your application or in K8s cluster related to this?
• Name Load balancer which you are using in your application and what all steps need to follow while configuring it with Kubernetes or any of the cloud?
• How will scale your single microservice or multiple microservices? Is application.yaml or application.properties enough or you have to tell anything to your cloud environment?
• What is service mash?
• What are the ways of communication between microservices?
• What will you use for Application Resilience?
• You have a microservice architecture with multiple services (e.g., User Service, Order Service, Payment Service). How would you handle communication between these services, and what patterns (e.g., synchronous vs. asynchronous) would you use?
• In a microservice architecture, how would you ensure data consistency when multiple services need to update shared data? Discuss strategies like distributed transactions or eventual consistency.
• Explain the role of an API Gateway in a microservices architecture. What functionalities would you implement in the API Gateway to improve security and performance?
• How would you implement service discovery in a microservices environment? Discuss the differences between client-side and server-side discovery approaches.
• Describe a scenario where a microservice might fail. How would you implement the Circuit Breaker pattern to handle failures and maintain system resilience?
• What monitoring and logging strategies would you employ in a microservices architecture? How would you centralize logs and metrics for better observability?
• You notice that one of your microservices is experiencing high load. How would you approach scaling this service, and what factors would you consider in your decision?
• What deployment strategies (e.g., blue-green deployment, canary releases) would you use for microservices, and how would you mitigate risks during deployment?
• Discuss the security challenges in a microservices architecture. What strategies would you implement to secure service-to-service communication?