Microservices Interview: Essential Questions and Answers

In this course, you'll learn everything you need to know to confidently tackle any microservices-related questions that come your way in your next interview. With 250+ questions and advanced explanations, we'll cover key concepts, principles, and design patterns, as well as common pitfalls and best practices of microservices architectures.

Over the years, software development moved away from traditional monolithic architectures, because of the complexities with tightly coupled, interconnected code. As a result, microservices are adopted many projects in many enterprise companies with using cloud-native approaches that enable distributed computing through multiple smaller services. And Microservices Architecture knowledge is key crucial skill that companies are demanding critically.

With this course, you'll test and learn about Microservices Interview Questions (250+) with topics listed below:

• Microservices Decomposition

• Microservices Communications (Sync / Async Message-Based Communication, API Gateways)

• Microservices Data Management (Databases / Query / Commands / Distributed Transactions)

• Microservices Distributed Transactions

• Microservices Deployments with Containers and Orchestrators

• Microservices Resilience

Patterns & Best Practices that we will cover during the course :

• API Gateway Pattern, Gateway Routing Pattern, Gateway Aggregation Pattern, Gateway Offloading Pattern, Backends for Frontends Pattern-BFF, Service Aggregator Pattern, Service Registry/Discovery Pattern

• Single-receiver Message-based Communication (one-to-one model), Multiple-receiver Message-based Communication (one-to-many model-topic), Fan-Out Publish/Subscribe Messaging Pattern, Topic-Queue Chaining & Load Balancing Pattern

• The Shared Database Anti-pattern, Relational and NoSQL Databases, CAP Theorem–Consistency, Availability, Partition Tolerance, Data Partitioning: Horizontal, Vertical and Functional Data Partitioning, Database Sharding Pattern

• Materialized View Pattern, CQRS Design Pattern, Event Sourcing Pattern, Eventual Consistency Principle

• Sidecar pattern, Service Mesh, Infrastructure as code (IaC), CI/CD pipelines

• Retry pattern, Circuit Breaker Pattern, Bulkhead Pattern, Fallback Pattern, Strangler Fig Pattern

And you'll learn how to discuss these topics in the context of real-world scenarios. We'll cover common interview questions.

Sample Questions :

• What does "design for failure" mean in a Microservices Architecture ?

• If you design e-commerce application with microservices, Which services could be exist in your architecture ?

• What are some patterns and best practices that are commonly used with asynchronous communication in microservices ?

• What are some advantages of using HTTP and WebSocket for push and real-time communication in microservices ?

• What are some advantages of using the publish/subscribe model and AMQP protocols for event-driven communication in microservices ?

• How does using GraphQL in a microservices architecture compare to using traditional RESTful APIs ?

• Which of the following use case best fit for gRPC usage in e-commerce microservices ?

• What are the use cases of WebSocket API Usage in real-world scenarios ?

• Which of the following is NOT typically a responsibility of an API Gateway ?

• How does the API Gateway apply rate limiting in an microservices-based application ?

• How Service Registry and Service Discovery is used together in microservices ?

• If you design e-commerce microservice application, how you apply Publish/Subscribe Messaging Pattern ?

• If you decide e-commerce databases, What is the data storage technology used by the inventory microservice that processes high-velocity streams of unstructured data ?

• Why is the Shared Database principle considered an anti-pattern for microservices ?

• Which type of database is best suited for a microservice that handles orders and transactions in an e-commerce system ?

• How can the CAP theorem be applied in the design and implementation of microservices ?

• How is database sharding pattern used to improve the performance and scalability of databases in microservices ?

• When should the materialized view pattern be used in microservices ?

• How can read and write databases be kept in sync in a CQRS architecture ?

• Which of the following can be real-world use cases of microservices that use CQRS and Event Sourcing ?

• How does distributed caching improve the performance of a system that uses microservices ?

• What is the main disadvantage of cache miss in a distributed caching system for microservices ?

• What is the advantage of using the saga pattern for implementing distributed transactions in microservices architecture ?

• Which is the example of a real-world scenario where the saga pattern could be used in a microservices architecture?

• In a choreography-based saga, who is responsible for coordinating the updates to the databases ?

• What is the key responsibility of the central orchestrator service in an orchestration-based saga implementation ?

• How can CDC and the transactional outbox pattern be used together in a microservice architecture ?

• What is the role of service meshes in the communication and coordination of microservices ?

• Why use Helm charts in Kubernetes for microservices deployments ?

• When is the sidecar pattern typically used in microservices deployments ?

• How can Infrastructure as code (IaC) be used with Kubernetes for microservices deployments ?

• What is the built-in mechanism in Kubernetes for microservices health monitoring ?

• When using the retry pattern, what is typically done after a temporary failure occurs ?

• What is the Circuit Breaker Pattern ?

• Which of the following is a microservices resilience pattern that helps prevent cascading failures ?

• What are some advantages of using the Strangler Fig Pattern for migrating a monolithic application to microservices ?

• What is the main advantage of using contract testing in a microservices architecture ?

How to maximize benefit of this practical test ?

To maximize benefit of this course, After taking this practical test, you should read all answers of every questions even you replied correctly. Because every question has extensive detailed explanations that you can learn all aspects of that topics.

By the end of this course, you'll have a deep understanding of microservices and the ability to articulate their benefits, drawbacks. Also you'll learn insider tips and tricks to help you ace your next microservices interview.  Plus, you'll gain the confidence and skills to hack your next software architecture interview and take your career to the next level.

By practicing with this test, You will learn how to demonstrate your knowledge and expertise in microservices with real-world experience and projects, and create strategy for how to effectively communicate and collaborate with the interviewers.

Enroll now and start learning today!