CKA Container Fundamentals

Question 1

What is the primary benefit of containerization over virtual machines?

Accepted Answer

Containers share the host OS kernel and are lighter weight

Answer

Containers share the host operating system kernel, making them more lightweight, faster to start, and more efficient with resources compared to VMs that require a full OS.

Question 2

What is Docker Hub?

Accepted Answer

A cloud-based registry for storing and sharing container images

Answer

Docker Hub is the default public registry for Docker images, where developers can store, share, and discover container images.

Question 3

What is a container image?

Accepted Answer

A read-only template containing the application and its dependencies

Answer

A container image is a lightweight, read-only template that includes everything needed to run an application: code, runtime, libraries, and settings.

Question 4

What is the purpose of a Dockerfile?

Accepted Answer

To define instructions for building a container image

Answer

A Dockerfile contains sequential instructions that define how to build a container image, including base image, dependencies, files to copy, and commands to run.

Question 5

What command starts a container from an image?

Accepted Answer

docker run

Answer

The 'docker run' command creates and starts a new container from a specified image, optionally with configuration flags for ports, volumes, and environment variables.

(CKA) Certified Kubernetes Associate Practice Test

(CKA) Certified Kubernetes Associate Practice Test

CKA Container Fundamentals