Microservices Fundamentals u0026 Interview Insights Quiz

Test your knowledge of microservices concepts, architecture, scalability, and best practices commonly discussed in interviews.

1. Definition of Microservices

   Which statement best describes microservices architecture?

   1. A technique for compressing software images.
   2. A single application built as a group of small, independent services.
   3. A user interface design pattern for mobile apps.
   4. A type of server hardware used in cloud computing.
   5. A database optimization strategy for faster queries.

2. Decentralized Data

   In a microservices architecture, how is data typically managed?

   1. Each service manages its own database.
   2. Data is always stored on client devices.
   3. Data is stored as spreadsheets in the cloud.
   4. All services share one large global database.
   5. Only the main API service accesses the database.

3. Independent Deployment

   What does it mean when microservices are 'independently deployable'?

   1. The entire application must be redeployed for any change.
   2. Services can only be deployed together as a bundle.
   3. Deployments are managed by client-side code.
   4. Individual deployments require manual code merges each time.
   5. Each service can be updated without redeploying the whole system.

4. Communication Protocols

   Which protocol is commonly used for communication between microservices?

   1. SMTP
   2. REST
   3. FTP
   4. PPTP
   5. IMAP

5. Monolithic vs Microservices

   How does a monolithic architecture differ from microservices?

   1. It eliminates the need for deployment.
   2. It always uses multiple databases.
   3. It never scales horizontally.
   4. It requires REST for communication.
   5. It uses a single codebase for all components.

6. Fault Isolation

   Why is fault isolation a key benefit of microservices?

   1. Services can never fail in this architecture.
   2. Faults automatically fix themselves.
   3. All errors crash the entire application.
   4. Services must share the same error logs.
   5. A failure in one service does not impact other services.

7. Scalability

   How do microservices enable better scalability compared to monolithic systems?

   1. Scaling is done only at the database level.
   2. Individual services can be scaled based on their own workloads.
   3. Services cannot be scaled separately.
   4. All services must scale in equal proportions.
   5. Scalability is managed only by hardware upgrades.

8. Domain-Driven Design

   What role does Domain-Driven Design (DDD) play in microservices?

   1. It controls database indexing strategies.
   2. It manages thread pools for concurrency.
   3. It helps define clear service boundaries based on business domains.
   4. It is responsible for service logging.
   5. It is used only for designing user interfaces.

9. Continuous Delivery

   Which statement best describes the relationship between microservices and continuous delivery?

   1. Microservices are well suited for continuous delivery because services can be updated independently.
   2. Updates to one service require downtime for all others.
   3. Continuous delivery is not possible with microservices.
   4. Only monolithic architectures allow frequent releases.
   5. Every microservice must be delivered manually.

10. Lightweight Communication

    Why is lightweight communication preferred in microservices?

    1. It eliminates the need for API documentation.
    2. It requires heavier frameworks for data transfer.
    3. It reduces network overhead between services.
    4. It slows down service integration.
    5. It only supports synchronous calls.

11. Service Discovery

    What is the main purpose of service discovery in microservices?

    1. It helps services dynamically locate each other on the network.
    2. It logs all error messages for debugging.
    3. It compresses API responses for faster delivery.
    4. It secures data stored in microservices.
    5. It manages user authentication.

12. API Gateway

    Why is an API gateway commonly used in microservices architectures?

    1. It stores all application data centrally.
    2. It performs code compilation for all services.
    3. It deploys client applications automatically.
    4. It is only used for database migrations.
    5. It routes client requests to the appropriate service.

13. Loose Coupling

    What does 'loose coupling' mean in the context of microservices?

    1. All service updates require a complete system restart.
    2. No service utilizes external communication.
    3. Services interact with minimal dependencies on each other.
    4. All services share common internal variables.
    5. Services are bundled in one code repository.

14. Security in Microservices

    Which approach is commonly used to secure communication between microservices?

    1. Allowing open access to all services.
    2. Sharing passwords over unencrypted channels.
    3. Using tokens for authentication and encryption.
    4. Storing credentials in public configuration files.
    5. Managing security only at the user interface level.

15. Microservices Example

    If an online shop application is built using microservices, which is a valid example of a single service?

    1. The entire checkout, payment, and shipping system together.
    2. An email inbox for the admin only.
    3. The full website frontend.
    4. An independent inventory management module.
    5. A detailed report about all user orders.