Microservices Microservices 2

Question 1

What is the primary purpose of an API gateway in a microservices architecture?

Accepted Answer

A single entry point that routes, aggregates, and secures requests to backend services

Answer

A database shared by all services

Answer

A tool for writing service code

Answer

A replacement for the operating system kernel

Question 2

Which pattern helps prevent cascading failures when a downstream service is unresponsive?

Accepted Answer

Circuit breaker

Answer

Singleton

Answer

Active record

Answer

Bulk insert

Question 3

In the database-per-service pattern, each microservice should:

Accepted Answer

Own its private data store and not share it directly with other services

Answer

Use one global shared schema for all services

Answer

Avoid databases entirely

Answer

Write only to a single central table

Question 4

What does service discovery solve in a dynamic microservices environment?

Accepted Answer

Locating network addresses of service instances that change frequently

Answer

Compiling source code faster

Answer

Encrypting disk volumes

Answer

Designing the UI layout

Question 5

Which communication style is asynchronous and decouples sender from receiver?

Accepted Answer

Message/event-based messaging via a broker

Answer

Synchronous blocking HTTP calls

Answer

Direct in-process function calls

Answer

Shared global variables

Question 6

What is a key benefit of independent deployability in microservices?

Accepted Answer

Teams can release a single service without redeploying the whole system

Answer

All services must always deploy together

Answer

Deployments become impossible

Answer

Code can never change

Question 7

Why is centralized logging important in microservices?

Accepted Answer

Requests span many services, so aggregated logs are needed to trace behavior

Answer

Logs are useless in distributed systems

Answer

It reduces the number of services

Answer

It replaces the need for testing