Docker General informations

Question 1

What is Docker?

Answer 1

Docker is an open-source platform that automates the deployment, scaling, and management of applications using containerization.

Question 2

True or False: Docker containers share the host OS kernel.

Answer 2

True

Question 3

What is the primary benefit of using Docker?

Answer 3

The primary benefit of using Docker is the ability to package applications and their dependencies into containers, ensuring consistent environments across development, testing, and production.

Question 4

Fill in the blank: Docker uses ______ to manage containers.

Answer 4

images

Question 5

What command is used to create a new Docker container?

Answer 5

docker run

Question 6

What is the difference between a container and a virtual machine?

Answer 6

Containers share the host OS and are lightweight, while virtual machines include a full OS and are more resource-intensive.

Question 7

True or False: Docker can run on any operating system.

Answer 7

False

Question 8

What is a Dockerfile?

Answer 8

A Dockerfile is a script containing a series of instructions on how to build a Docker image.

Question 9

Which command lists all running Docker containers?

Answer 9

docker ps

Question 10

What is the purpose of Docker Compose?

Answer 10

Docker Compose is used to define and run multi-container Docker applications.

Question 11

Fill in the blank: Docker containers are ______ than virtual machines.

Answer 11

more efficient

Question 12

What is the default storage driver used by Docker?

Answer 12

overlay2

Question 13

True or False: Docker can be used for both development and production environments.

Answer 13

True

Question 14

What is the command to stop a running Docker container?

Answer 14

docker stop

Question 15

What file format is used to define a Docker image?

Answer 15

tar

Question 16

What is a Docker registry?

Answer 16

A Docker registry is a repository for storing and distributing Docker images.

Question 17

Which command is used to pull an image from Docker Hub?

Answer 17

docker pull

Question 18

Fill in the blank: In Docker, ______ is the process of creating an image from a container.

Answer 18

committing

Question 19

What is the main advantage of containerization over traditional virtualization?

Answer 19

Containerization allows for faster start-up times and less overhead compared to traditional virtualization.

Question 20

True or False: Docker is designed to run applications in isolation from one another.

Answer 20

True

Question 21

What command is used to remove a Docker container?

Answer 21

docker rm

Question 22

What are the two main components of Docker architecture?

Answer 22

Docker Engine and Docker Hub

Question 23

Fill in the blank: Docker containers are ______ than virtual machines.

Answer 23

lighter

Question 24

What command is used to build a Docker image from a Dockerfile?

Answer 24

docker build

Question 25

True or False: Docker can only be used with Linux operating systems.

Answer 25

False

Question 26

What is the purpose of the Docker CLI?

Answer 26

The Docker CLI (Command Line Interface) is used to interact with the Docker daemon and manage containers and images.

Question 27

What does 'orchestration' refer to in the context of Docker?

Answer 27

Orchestration refers to the automated management of containerized applications, including deployment, scaling, and networking.