Microservice Interview Questions

QUE : What is idempotency in microservices?

Performing the same operation multiple times
produces the same final result as performing it once.

Idempotency is fundamentally about: Making retries safe.

QUE : Why Idempotency Is Important in Microservices

In distributed systems:

• requests fail
• networks timeout
• messages duplicate
• consumers retry
• brokers redeliver events

Retries are normal behavior.

Without idempotency:

• duplicate orders
• duplicate payments
• inconsistent data
• inventory corruption

HTTP defines some methods as idempotent.

MethodIdempotent?

GET:Yes

PUT : Yes

DELETE :Yes

POST : Usually No

QUE : How do you deploy microservices using Docker?

Deploying microservices with Docker involves containerizing each individual service and then managing their interaction using an orchestration tool. For development and small-scale deployments, Docker Compose is the standard, while Kubernetes or Docker Swarm are used for large-scale production environments.