Single responsibility per service in Microservices - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does 'Single responsibility per service' mean in microservices?

It means each microservice should focus on doing one specific job or task well, like a specialist in a team, rather than trying to do many things at once.

beginner

Why is having a single responsibility per service beneficial?

It makes services easier to understand, develop, test, and maintain. It also helps teams work independently and scale parts of the system separately.

intermediate

How does single responsibility per service improve system scalability?

Since each service handles one task, you can scale only the services that need more resources without affecting others, saving cost and improving performance.

intermediate

What is a common mistake when designing microservices related to responsibility?

Trying to put too many unrelated functions into one service, which makes it complex, hard to maintain, and less flexible.

beginner

Give a real-life example of single responsibility per service.

Imagine a food delivery app: one service handles user accounts, another handles orders, and another handles payments. Each service does one job well.

What is the main idea behind single responsibility per service?

A Each service should do one specific task.

B Each service should handle all tasks for a user.

C Services should share responsibilities equally.

D Services should be as large as possible.

Single responsibility means focusing each service on one task to keep it simple and manageable.

Which is a benefit of single responsibility per service?

A Harder to test services.

B Easier to scale individual services.

C More complex service dependencies.

D Slower development cycles.

Focusing services on one task allows scaling only the needed parts, improving efficiency.

What problem arises if a service has multiple responsibilities?

A It becomes less flexible and harder to update.

B It improves team independence.

C It reduces the number of services needed.

D It becomes easier to maintain.

Multiple responsibilities make a service complex and harder to change without affecting other parts.

In a microservices system, what should a payment service handle?

A User login and authentication.

B Sending marketing emails.

C Order tracking and delivery.

D Processing payments and transactions.

The payment service should focus only on payment-related tasks.

How does single responsibility per service affect team work?

A Teams share responsibility for all services equally.

B Teams must always coordinate on all services.

C Teams can work independently on different services.

D Teams cannot own a service fully.

Clear service boundaries let teams develop and deploy independently.

Explain the concept of single responsibility per service and why it matters in microservices.

Think about how dividing work into small focused parts helps a team.

Describe a simple example of a microservices system designed with single responsibility per service.

Use a real-life app like food delivery or online shopping.