Top 150 Microservices Interview Questions and Answers

Microservices can be deployed using containerization tools like Docker and orchestration tools like Kubernetes.

• Use containerization tools like Docker to package each microservice along with its dependencies into a container image.

• Leverage orchestrati...read more

API Gateway acts as a single entry point for all the microservices in a system.

• API Gateway provides a unified interface for clients to access multiple microservices.

• It handles authentication, rate limiting, and routing of requests to the appropriate ...read more

Yes, parallel execution is possible in microservices.

• Microservices architecture allows for independent deployment and scaling of services.

• Each microservice can be executed in parallel, enabling concurrent processing.

• Parallel execution improves perfor...read more

Spring Cloud is a set of tools and frameworks for building cloud-native applications in Java.

• Spring Cloud provides tools for service discovery, load balancing, configuration management, and more in microservices architecture.

• It includes projects like...read more

Fault tolerance in Microservices can be achieved through redundancy, graceful degradation, and circuit breakers.

• Implementing redundancy by having multiple instances of each microservice running to handle failures.

• Using graceful degradation to ensure ...read more

SOA is a design pattern where components are designed to communicate via services, while microservices is an architectural style where an application is composed of small, independent services.

• SOA focuses on reusability and interoperability of servic...read more

Monolithic applications can be broken down to microservices by identifying cohesive and loosely coupled components and separating them into independent services.

• Identify the business capabilities of the application

• Identify the cohesive and loosely co...read more

Distributed transactions involve multiple systems coordinating to ensure data consistency across different services in a microservices architecture.

• Distributed transactions involve multiple services or databases working together to ensure data consis...read more

SAGA pattern is a design pattern used in microservices architecture to manage distributed transactions.

• SAGA pattern breaks down a long-running transaction into a series of smaller, independent transactions.

• Each step in the SAGA pattern is a separate ...read more

The rules for parcel delivery time estimation should be decoupled from the service for better maintainability and flexibility.

• Decoupling the rules from the service allows for easier maintenance and updates without affecting the service itself.

• Separat...read more

Microservices interact with each other through APIs, messaging, or events.

• Microservices communicate with each other through APIs, which can be synchronous or asynchronous.

• Messaging systems like RabbitMQ or Kafka can be used for communication between ...read more

Implement security in microservices by using authentication, authorization, encryption, and monitoring.

• Use authentication mechanisms like OAuth, JWT, or API keys to verify the identity of clients accessing the microservices.

• Implement authorization co...read more

Zipkin is a distributed tracing system used to monitor microservices communication.

• Add Zipkin dependencies to each microservice

• Configure each microservice to send tracing data to Zipkin server

• Use Zipkin UI to visualize and analyze the tracing data

• Add...read more

Breaking down the monolith into smaller, independent services.

• Identify the bounded contexts and business capabilities of the application.

• Decide on the granularity of the services.

• Design the APIs and communication protocols between the services.

• Implem...read more

Monolithic SOE is a single large application while Microservices architecture breaks down the application into smaller, independent services.

• Monolithic SOE is a single, self-contained application where all components are tightly coupled.

• Microservices...read more

Ensure data consistency in microservices by using distributed transactions, event sourcing, and eventual consistency.

• Use distributed transactions to ensure all changes to multiple databases are either committed or rolled back together.

• Implement event...read more

Yes, microservices can contain transactional data.

• Microservices can handle transactional data by using distributed transactions or event sourcing.

• Each microservice can manage its own database, which can include transactional data.

• Microservices can co...read more

LLD of microservices involves designing the internal structure and interactions of individual microservices within a larger system.

• Define clear boundaries and responsibilities for each microservice

• Use APIs for communication between microservices

• Imple...read more

Nodejs is a popular choice for developing microservices due to its lightweight and scalable nature.

• Nodejs allows for easy creation and deployment of microservices

• It has a vast library of modules and packages that can be used to build microservices

• Nod...read more

Session management in Microservices involves handling user sessions across multiple services.

• Use stateless authentication mechanisms like JWT tokens to manage sessions

• Implement session persistence using databases or caching mechanisms

• Use session toke...read more

Validation of microservices involves ensuring that each microservice functions correctly and integrates seamlessly with other services.

• Validate each microservice individually to ensure it meets its functional requirements

• Test the integration between ...read more

Microservices offer scalability, flexibility, and fault isolation in software development.

• Scalability: Microservices allow for independent scaling of different components, making it easier to handle increased load on specific services.

• Flexibility: Ea...read more

Microservices design pattern is an architectural approach to building software applications as a collection of small, independent services.

• Microservices are independently deployable and scalable

• Each microservice focuses on a specific business capabil...read more

Load balancing and messaging are crucial for scalability and reliability in microservices architecture.

• Load balancing ensures even distribution of traffic among multiple instances of a service.

• Messaging enables asynchronous communication between micr...read more

SOA focuses on large, monolithic services while Microservices are small, independent services.

• SOA is a centralized architecture with shared services, while Microservices are decentralized with each service having its own database.

• SOA is typically imp...read more

Messaging between microservices involves communication through message brokers or direct API calls.

• Microservices communicate through message brokers like RabbitMQ or Kafka.

• Messages are sent in a format like JSON or XML.

• Microservices can also communic...read more

Implement rate limiting, load balancing, and circuit breaking to handle too many requests in micro service architecture.

• Implement rate limiting to control the number of requests a service can handle within a specific time frame.

• Use load balancing to ...read more