KCNA Cloud Native Patterns 4

Question 1

What is the Ambassador pattern in cloud native architectures?

Accepted Answer

A sidecar that proxies network traffic on behalf of the main container

Answer

The Ambassador pattern uses a sidecar proxy to handle outbound network concerns like retries, TLS, and service discovery on behalf of the main container.

Question 2

Which pattern involves running a container that completes setup tasks before the main application container starts?

Accepted Answer

Init Container

Answer

Init Containers run to completion before the main containers start, making them ideal for setup tasks like schema migrations or config fetching.

Question 3

In a service mesh, what component typically handles communication between services at the data plane level?

Accepted Answer

Sidecar proxy (e.g., Envoy)

Answer

Service meshes use sidecar proxies like Envoy injected alongside each service to intercept and manage all inter-service communication.

Question 4

What is eventual consistency in the context of distributed cloud native systems?

Accepted Answer

Data will become consistent across nodes given enough time without new updates

Answer

Eventual consistency guarantees that, if no new updates occur, all replicas will converge to the same value over time.

Question 5

Which cloud native pattern helps external clients communicate with services that use incompatible internal protocols?

Accepted Answer

Adapter

Answer

The Adapter pattern wraps a service to translate its interface so external clients can communicate with it using a compatible protocol.

(KCNA) Kubernetes and Cloud Native Associate Practice Test

(KCNA) Kubernetes and Cloud Native Associate Practice Test

KCNA Cloud Native Patterns 4