Microservices Made Simple: Essential Interview Questions for 2025 Quiz

1. Microservices Fundamentals

   What is the main advantage of building an application with microservices instead of a monolithic architecture?

   1. A. Microservices allow each component to scale independently.
   2. B. Microservices require fewer programming languages.
   3. C. Microservices eliminate the need for APIs.
   4. D. Microservices are always faster to develop.
   5. E. Microservices use only one database for all services.

2. Communication Methods

   Which is an example of asynchronous communication between microservices?

   1. A. HTTP REST API call
   2. B. Synchronous function call
   3. C. Messaging through a queue (e.g., RabbitMQ)
   4. D. Direct database query
   5. E. gRPC without streaming

3. API Gateway Role

   What is one of the main roles of an API Gateway in a microservices architecture?

   1. A. Storing all service data centrally
   2. B. Routing client requests to the correct service
   3. C. Replacing authentication for every service
   4. D. Writing automated unit tests
   5. E. Managing developer onboarding

4. Service Discovery

   In microservices, which component helps services find and communicate with each other dynamically?

   1. A. Service mesh
   2. B. Load balancer
   3. C. Service registry
   4. D. Static IP tables
   5. E. Configuration map

5. Microservices Testing

   What is a common challenge when testing microservices compared to monolithic applications?

   1. A. Lack of programming languages
   2. B. Difficulty in isolating dependent services
   3. C. Excessive use of hardcoded values
   4. D. Easy integration with single databases
   5. E. Single-threaded performance issues

6. Fault Tolerance Mechanisms

   Which pattern helps prevent system failure by stopping calls to a malfunctioning microservice?

   1. A. Retry pattern
   2. B. Singleton design
   3. C. Circuit breaker
   4. D. Load shedding
   5. E. Cache invalidation

7. Eventual Consistency

   What does eventual consistency mean in a distributed microservices environment?

   1. A. Data in all services is always synchronized instantly.
   2. B. Data changes may take time to propagate, but will be consistent eventually.
   3. C. Each service uses the same database schema.
   4. D. Services do not need to sync data at all.
   5. E. Only the fastest service's data is valid.

8. Containerization in Microservices

   What is the primary role of Docker in a microservices environment?

   1. A. Orchestrating network traffic
   2. B. Managing business logic
   3. C. Packaging services into containers for consistent deployment
   4. D. Rewriting legacy code automatically
   5. E. Handling database backups

9. Security Practices

   Which method enhances secure communication between microservices?

   1. A. Using HTTP without encryption
   2. B. Applying rate limiting
   3. C. Implementing mutual TLS (mTLS)
   4. D. Logging debug information to console
   5. E. Storing passwords in plain text

10. Service Boundaries

    In Domain-Driven Design, what does a 'bounded context' refer to in microservices?

    1. A. A physical network boundary used for security
    2. B. A clearly defined business domain owned by a specific microservice
    3. C. A type of service deployment tool
    4. D. An API version boundary
    5. E. An undefined area shared by all services