Docker

Question 1

A container is a runtime instance of an i_._.

Answer 1

A container is a runtime instance of an image

Question 2

A c________ is a runtime instance of an image

Answer 2

A container is a runtime instance of an image

Question 3

C________s package software into standardized units

Answer 3

Containers package software into standardized units

Question 4

H________s are software that manages physical resources on a server

Answer 4

Hypervisors are software that manages physical resources on a server

Question 5

The major benefit of containers is that you can ship and run applications everywhere because containers b________ everything that the application needs to run.

Answer 5

The major benefit of containers is that you can ship and run applications everywhere because containers bundle everything that the application needs to run.

Question 6

The docker d_____ is a process running in the background that is responsible for managing containers, images, networks, and volumes.

Answer 6

The docker daemon is a process running in the background that is responsible for managing containers, images, networks, and volumes.

Question 7

The docker clients (docker desktop or docker CLI) communicate with the docker d_____ to perform actions on or with containers.

Answer 7

The docker clients (docker desktop or docker CLI) communicate with the docker daemon to perform actions on or with containers.

Question 8

Docker images can be stored in r________s in the cloud via DockerHub

Answer 8

Docker images can be stored in registries in the cloud via DockerHub

Question 9

When a container is launched, it gets one final layer called the w________ layer that is used for local storage

Answer 9

When a container is launched, it gets one final layer called the writable layer that is used for local storage

Question 10

When two containers are launched from the same image, this w________ layer is what distinguishes them from one another.

Answer 10

When two containers are launched from the same image, this writable layer is what distinguishes them from one another.

Question 11

The writable layer is not p________ and is lost between starts and stops.

Answer 11

The writable layer is not persistent and is lost between starts and stops.

Question 12

docker images are r____-only and i________able

Answer 12

docker images are -> read-only and immutable <-

Question 13

Docker supports a temporary filesystem called t____s, which is stored in memory (RAM)

Answer 13

Docker supports a temporary filesystem called tmpfs which is stored in memory (RAM)

Question 14

B____ m____ maps a host folder to a container folder, allowing the container to access files on the host.

Answer 14

Bind mount maps a host folder to a container folder, allowing the container to access files on the host.

Question 15

V_____s are persistent storage that are managed by docker but utilize the host machine. They allow you to create persistence storage that exists outside of the lifecycle of an individual container.

Answer 15

Volumes are persistent storage that are managed by docker but utilize the host machine. They allow you to create persistence storage that exists outside of the lifecycle of an individual container.

Question 16

Containers on the same b____ network can communicate with one another but can’t be reached from outside the docker host without port publishing.

Answer 16

Containers on the same bridge network can communicate with one another but can’t be reached from outside the docker host without port publishing.

Question 17

P____ p____ing maps a host port to a container port on the bridge network. This allows requests made to the host port to access the container port and the running process within it.

Answer 17

Port publishing maps a host port to a container port on the bridge network. This allows requests made to the host port to access the container port and the running process within it.

Question 18

by utilizing a b_____ network, multiple containers can share the same port number. However, to make them accessible from outside the internal network, the port must be mapped to unique and unused ports on the host machine.

Answer 18

by utilizing a bridge network, multiple containers can share the same port number. However, to make them accessible from outside the internal network, the port must be mapped to unique and unused ports on the host machine.