Microservices Containerization and Orchestration 2

Question 1

In Kubernetes, which object ensures a specified number of identical Pod replicas are always running?

Accepted Answer

ReplicaSet

Answer

ConfigMap

Answer

Ingress

Answer

Namespace

Question 2

What is the smallest deployable unit in Kubernetes?

Accepted Answer

Pod

Answer

Container

Answer

Node

Answer

Service

Question 3

Which Docker instruction sets the default command executed when a container starts?

Accepted Answer

CMD

Answer

RUN

Answer

COPY

Answer

FROM

Question 4

What does a Kubernetes Service of type ClusterIP provide?

Accepted Answer

An internal-only stable IP for Pods

Answer

A public load balancer IP

Answer

A node-level port on every host

Answer

External DNS registration

Question 5

Which command builds a Docker image from a Dockerfile in the current directory?

Accepted Answer

docker build .

Answer

docker run .

Answer

docker pull .

Answer

docker exec .

Question 6

In Kubernetes, what is the purpose of a liveness probe?

Accepted Answer

To restart a container that has become unhealthy

Answer

To check if a container should receive traffic

Answer

To scale Pods based on CPU

Answer

To mount persistent storage

Question 7

Which component is the entry point for all Kubernetes API requests?

Accepted Answer

kube-apiserver

Answer

kubelet

Answer

kube-proxy

Answer

etcd