Loose coupling in Microservices - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is loose coupling in system design?

Loose coupling means designing parts of a system so they depend on each other as little as possible. This makes the system easier to change and maintain.

beginner

Why is loose coupling important in microservices?

Loose coupling allows microservices to work independently. This means one service can change or fail without breaking others, improving system reliability and scalability.

intermediate

Name one common way to achieve loose coupling between microservices.

Using asynchronous messaging or event-driven communication helps services interact without waiting for each other, reducing direct dependencies.

intermediate

How does loose coupling affect system scalability?

With loose coupling, services can be scaled independently based on their load, making the system more efficient and cost-effective.

beginner

What is a downside of tight coupling in system design?

Tight coupling makes systems fragile. Changes in one part can cause failures in others, making updates risky and slowing down development.

Which of the following best describes loose coupling?

A Components have minimal dependencies

B Components are tightly integrated

C Components share the same database

D Components depend heavily on each other

Loose coupling means components have minimal dependencies, allowing them to change independently.

What communication style supports loose coupling in microservices?

A Shared memory

B Direct database access

C Synchronous HTTP calls

D Asynchronous messaging

Asynchronous messaging allows services to communicate without waiting, reducing tight dependencies.

Loose coupling helps improve which of the following?

A System fragility

B Tight integration

C Development speed and flexibility

D Single point of failure

Loose coupling improves development speed and flexibility by reducing dependencies.

Which is a sign of tight coupling?

A One service failure crashes the whole system

B Services communicate via events

C Services can be updated independently

D Services have separate databases

If one service failure crashes the whole system, it indicates tight coupling.

What is a benefit of loose coupling in scaling microservices?

A Services cannot be scaled

B Each service scales independently

C All services scale together

D Scaling is not needed

Loose coupling allows each service to scale independently based on its needs.

Explain loose coupling in microservices and why it matters.

Think about how services can work without tightly depending on each other.

Describe methods to achieve loose coupling in a microservices architecture.

Focus on communication styles and data management.