Microservices Architecture Principles Quiz

1. What is Microservices Architecture?

• Microservices architecture is a software architectural style where an application is divided into small, loosely coupled services that can be developed, deployed, and maintained independently.
• Microservices architecture relies on synchronous communication between all services for performance.
• Microservices architecture uses a centralized database to manage all application data.
• Microservices architecture combines various functions into a single monolithic application for efficiency.

2. What are the key components of Microservices Architecture?

• Static Files, Load Balancer, and CPU Cores
• Containers, API Gateway, and Service Registry
• User Interface, Database Management, and Coding Standards
• Mainframe, Legacy Systems, and Desktop Applications

3. What is the purpose of the Service Registry in Microservices?

• The Service Registry stores user data.
• The Service Registry keeps track of services.
• The Service Registry handles security protocols.
• The Service Registry manages transactions.

4. What is Event-Driven Architecture in Microservices?

• Event-Driven Architecture eliminates the need for APIs in microservices architecture.
• Event-Driven Architecture requires all services to communicate synchronously for efficiency.
• Event-Driven Architecture centralizes all service interactions through a single queue.
• Event-Driven Architecture involves services emitting events when they perform actions.

5. Why is each microservice given its own database in Microservices Architecture?

• To reduce the need for network calls.
• To centralize all data in one place.
• To simplify the overall database structure.
• To ensure loose coupling and better performance.

6. What is the Bulkhead Pattern in Microservices?

• The Bulkhead Pattern automatically scales all services together.
• The Bulkhead Pattern allows unlimited database connections for a service.
• The Bulkhead Pattern isolates application elements into pools to prevent cascading failures.
• The Bulkhead Pattern combines microservices into a single large service.

7. What is the Backends for Frontends (BFF) Pattern in Microservices?

• The BFF Pattern eliminates the need for APIs entirely.
• The BFF Pattern requires clients to access only one service.
• The BFF Pattern creates separate backend services for different clients.
• The BFF Pattern merges all backend services into one.

8. What is Continuous Integration (CI) in Microservices?

• Continuous Integration involves manual testing after deployment.
• Continuous Integration automates building and testing microservices for code changes.
• Continuous Integration means deploying microservices without testing them.
• Continuous Integration requires all microservices to be built into one monolith.

9. What is Eureka concerning Microservices?

• Eureka is a service discovery server for microservices.
• Eureka is a programming language used in microservices.
• Eureka is a database management tool for microservices.
• Eureka is a testing framework for microservices.

10. What are the popular companies implementing Microservices Architecture?

• Facebook
• Amazon
• Microsoft
• Adobe

11. What is the purpose of API Aggregation in Microservices?

• API aggregation is used for data storage management.
• API aggregation focuses on user interface design.
• API aggregation automates the deployment process.
• API aggregation enables effective service communication.

12. What is the Consumer-Driven Contracts Pattern in Microservices?

• The Consumer-Driven Contracts Pattern enforces a single contract for all service interactions.
• The Consumer-Driven Contracts Pattern standardizes communication protocols for all services.
• The Consumer-Driven Contracts Pattern requires producers to dictate terms for consumers directly.
• The Consumer-Driven Contracts Pattern involves consumers specifying their expectations from producers, allowing for more robust and coordinated changes between services.

13. What is the Smart Endpoints, Dumb Pipes Pattern in Microservices?

• It promotes placing all database logic inside the communication layers.
• This pattern advocates for smart endpoints with business logic and dumb pipes for simple message routing.
• It suggests allocating heavy processing on pipes while keeping endpoints lightweight.
• This pattern requires complex middleware for managing service communication.

14. What is the Circuit Breaker Pattern in Microservices?

• The Circuit Breaker Pattern improves service response times by caching results.
• The Circuit Breaker Pattern prevents cascading failures by stopping requests to a failing service.
• The Circuit Breaker Pattern ensures data consistency across all services.
• The Circuit Breaker Pattern merges services to optimize resource use.

15. What is the Database per Service Pattern in Microservices?

• Each service relies on a centralized database for access.
• Microservices store data in an external file system together.
• Each microservice has its own database for isolation.
• Microservices share a single database for efficiency.

16. What is the Single Service per Host Pattern in Microservices?

• Multiple services share the same database.
• A single service handles all requests on one host.
• Services are combined into one single application.
• Each microservice is deployed on a separate host.

17. What is the Multiple Services per Host Pattern in Microservices?

• This pattern requires each microservice to have its own dedicated host to ensure full isolation.
• This pattern involves deploying multiple microservices on the same host, which can improve resource utilization but requires careful management to prevent cascading failures.
• This pattern involves deploying only one microservice on multiple hosts for better load balancing.
• This pattern allows allowing redundant services to share hosts to enhance availability.

18. What is the API Gateway Pattern in Microservices?

• The API Gateway Pattern restricts client access to services by requiring unique connection strings for each request.
• The API Gateway Pattern routes traffic between microservices without any entry point, ensuring high availability.
• The API Gateway Pattern implements load balancing for microservices with multiple database connections.
• The API Gateway Pattern defines how clients access services in a microservices architecture, providing a single entry point for all requests and handling tasks like authentication and routing.

19. What is the Client-side Discovery Pattern in Microservices?

• The Client-side Discovery Pattern uses only a centralized service registry for requests.
• The Client-side Discovery Pattern involves clients discovering service instances directly.
• The Client-side Discovery Pattern allows services to query databases directly for information.
• The Client-side Discovery Pattern requires each service to be hard-coded in clients.

20. What is the Server-side Discovery Pattern in Microservices?

• The Server-side Discovery Pattern necessitates direct client-to-client communication.
• The Server-side Discovery Pattern emphasizes storing data in a central database.
• The Server-side Discovery Pattern requires clients to fetch service configurations.
• The Server-side Discovery Pattern involves services registering with a central registry.

21. What is the concept of Coupling in Microservices?

• Coupling defines how many services can run on a single server.
• Coupling refers to the speed of communication between microservices.
• Coupling is the extent of interdependence between software modules in microservices.
• Coupling specifies the maximum size of each microservice`s database.

22. What are the design principles of Microservices Architecture?

• Centralized services, rigid integration, fixed resource allocation, single point of control, manual monitoring, failure dependency, static load distribution, exclusion of DevOps, non-versioned updates, and unavailability.
• Monolithic architecture, simplistic services, restricted adaptability, constrained expansion, inconsistent review, dependency failures, random load adjustments, minimal DevOps involvement, versioning neglect, and unstable access.
• Complex interdependencies, API fragmentation, inflexible architecture, limited scalability, sporadic monitoring, cascading failures, delayed load balancing, isolated DevOps, frequent version conflicts, and downtime.
• Independent and autonomous services, API aggregation, flexibility, scalability, constant monitoring, failure isolation, real-time load balancing, inclusion of DevOps, versioning, and availability.

23. What is the purpose of Independent and Autonomous Services in Microservices?

• Each microservice should operate independently with its own resources, including separate databases and business logic, to ensure scalability and maintainability.
• Microservices should only interact through a centralized service to facilitate communication and control.
• The purpose is to enforce strict interdependencies between services for better workflow management.
• All microservices must share a common database to improve data consistency and performance.

24. What is the purpose of Flexibility in Microservices?

• Flexibility restricts changes to one microservice.
• Flexibility ensures all services use the same database.
• Flexibility allows microservices to adapt to changing requirements.
• Flexibility requires services to be tightly integrated.

25. What is the purpose of Scalability in Microservices?

• Scalability ensures that the system can handle increased load efficiently.
• Scalability allows all services to share a single database.
• Scalability ensures that all microservices must be deployed together.
• Scalability prevents any changes to microservices without downtime.

26. What is the purpose of Constant Monitoring in Microservices?

• Constant monitoring automatically scales services up or down.
• Constant monitoring encrypts communication between services.
• Constant monitoring helps identify issues early and ensures quick resolution.
• Constant monitoring prevents data loss in the application.

27. What is the purpose of Failure Isolation in Microservices?

• Failure isolation improves code readability and maintainability.
• Failure isolation guarantees 100% uptime and eliminates all errors.
• Failure isolation enhances system performance by maximizing resources.
• Failure isolation prevents cascading failures by isolating application components.

28. What is the purpose of Real-time Load Balancing in Microservices?

• Real-time load balancing encrypts data during transmission.
• Real-time load balancing merges all services into one platform.
• Real-time load balancing distributes incoming traffic across multiple service instances.
• Real-time load balancing stores user data for later retrieval.

29. What is the purpose of Inclusion of DevOps in Microservices?

• Inclusion of DevOps slows down development processes.
• Inclusion of DevOps improves efficiency and reliability.
• Inclusion of DevOps eliminates the need for testing.
• Inclusion of DevOps increases manual work in deployment.

30. What is the purpose of Versioning in Microservices?

• Versioning reduces the number of microservices in the architecture.
• Versioning helps create single large applications for easier maintenance.
• Versioning eliminates the need for communication between services.
• Versioning helps manage different versions of microservices, ensuring stability.