> > Docker MCQs > Basic Docker MCQs

Basic Docker MCQ

1. Choose the correct statement for Docker Compose.

Allows orchestration of Docker containers natively

Docker Compose will act as Docker server to run Docker Containers

Docker Compose is used to generate new LXC container's by creating a new file system and mounting a read/write layer

Docker Compose lets us build, download, start and stop images or containers

Answer

Correct Answer: Allows orchestration of Docker containers natively

Note: This Question is unanswered, help us to find answer for this one

2. Swarm currently supports following values?

spread

random

strategy

binpack

Answer

Correct Answer: spread
random

Note: This question has more than 1 correct answers

Note: This Question is unanswered, help us to find answer for this one

3.
How wll manager nodes handle cluster management tasks? (choose all that apply)

maintaining cluster state

serving swarm mode HTTP API endpoints

scheduling services

None of the above

Answer

Correct Answer: maintaining cluster state
serving swarm mode HTTP API endpoints
scheduling services

Note: This question has more than 1 correct answers

Note: This Question is unanswered, help us to find answer for this one

4.
A fast way to remove a dangling image is to use the following command:

$ docker rmi -f $(docker images -q +a -f dangling=1)

$ docker rmi -f $(docker images -q -a -f dangling=true)

$ docker rmr -f $(docker images -q -a -r dangling=true)

$ docker rmd -f $(docker images -q -a -d dangling=true)

Answer

Correct Answer: $ docker rmi -f $(docker images -q -a -f dangling=true)

Note: This Question is unanswered, help us to find answer for this one

5.
Swarm supports the following backend discovery services?

Consul

Hosted

etcd

Zookeeper

All of the above

Answer

Correct Answer: All of the above

Note: This Question is unanswered, help us to find answer for this one

6.
Which statement is True of Docker swarm?

A clustering tool for docker

Tool for automatic deployment of docker containers

Both 1 and 2

None of the above

Answer

Correct Answer: A clustering tool for docker

Note: This Question is unanswered, help us to find answer for this one

7.
Which statement is correct about Service discovery?

The swarm manager lets you control the delay between service deployment to different sets of nodes

Swarm manager nodes assign each service in the swarm a unique DNS name and load balances running containers

The swarm manager node constantly monitors the cluster state and reconciles any differences between the actual state your expressed desired state

Swarm manager automatically adapts by adding or removing tasks to maintain the desired state

Answer

Correct Answer: Swarm manager nodes assign each service in the swarm a unique DNS name and load balances running containers

Note: This Question is unanswered, help us to find answer for this one

8.
How can you configure the LDAP integration?

Go to the Repositories web UI, navigate to the Settings page, and click the Auth tab

Go to the Users web UI, navigate to the UCP page, and click the Auth tab

Go to the use setting web UI, navigate to the admin page, and click the Auth tab

Go to the UCP web UI, navigate to the Settings page, and click the Auth tab

Answer

Correct Answer: Go to the UCP web UI, navigate to the Settings page, and click the Auth tab

Note: This Question is unanswered, help us to find answer for this one

9.
Choose the correct statement to describe the contents directory found under the filesystem location shown below. /var/lib/docker

A collection of Docker image files.

A collection of sub images that make the image layers

A collection of json files with metatdata for the images

A collection of two files consisting of metadata in json, number of layers, and a subdirectory with the root filesystem for the image.

Answer

Correct Answer: A collection of two files consisting of metadata in json, number of layers, and a subdirectory with the root filesystem for the image.

Note: This Question is unanswered, help us to find answer for this one

10.
Choose the correct statement to describe the Docker Hub in the Docker Workflow.

Docker Hub is a Container Management System

Docker Hub is the store for your Docker images

Docker Hub provides both public and private storage for images, where images can be searched for and can be downloaded

Docker Hub is the store for your Dockerfiles

Answer

Correct Answer: Docker Hub provides both public and private storage for images, where images can be searched for and can be downloaded

Note: This Question is unanswered, help us to find answer for this one

11.
The Docker zfs storage driver makes extensive use of the following ZFS datasets:

snapshots

clones

filesystems

None of the above

Answer

Correct Answer: snapshots
clones
filesystems

Note: This question has more than 1 correct answers

Note: This Question is unanswered, help us to find answer for this one

12.
Choose the correct statement for Automated Builds in the Docker Workflow.

Docker Hub supports GitHub and BitBucket for Automated Build via a Web commit hook.

You must Specify where the Dockerfile is located in your GitHub or BitBucket repository

You must Specify where the Branch in your GitHub or BitBucket repository is

You must assign an optional Docker tag to the Build

Answer

Correct Answer: Docker Hub supports GitHub and BitBucket for Automated Build via a Web commit hook.

Note: This Question is unanswered, help us to find answer for this one

13.
Choose the correct statement to describe the Docker File entry below. FROM ubuntu

Pulls the Ubuntu container from Docker Hub

Builds the Ubuntu image for the container

Includes the Ubuntu image as the base layer for the Docker File build.

Creates ubuntu as a sub-directory that holds the rootfs for the container image

Answer

Correct Answer: Includes the Ubuntu image as the base layer for the Docker File build.

Note: This Question is unanswered, help us to find answer for this one

14.
Choose the correct statement to describe Docker.

Docker is a Container Management System.

Docker makes Linux Containers easier to use

Docker containers run processes with guarantees of isolation.

Docker virtualization can fully replace Hypervisor's

Answer

Correct Answer: Docker containers run processes with guarantees of isolation.

Note: This Question is unanswered, help us to find answer for this one

15.
For the following 'docker-compose.yml' fragment scala: build: ./scala expose: - 40000-50000 ports: - 9000:9000 - 4040:4040 links: - mongo volumes: - ../../:/root/cardio - ~/.ivy2:/root/.ivy2 - ~/.sbt:/root/.sbt stdin_open: true Choose the correct statement to describe the 'expose' command as used in the code.

The 'expose' command associates a specified port for the running process inside the container

The 'expose' instruction indicates the ports on which a container will listen for connections

Port mapping is necessary for accessing a container from the host to a (linked) container

Updates the PORT environment variable.

Answer

Correct Answer: The 'expose' instruction indicates the ports on which a container will listen for connections

Note: This Question is unanswered, help us to find answer for this one

16.
How can you create a hashtable with the settings for your container?

$webContainer = @[Name="web"; Image="anweiss/docker-platynem"; Port="80"]

$webContainer = @{Name="web"; Image="anweiss/docker-platynem"; Port="80"}

$webContainer = @{Name="web"; Image="anweiss/docker-platynem"; Port="80:80"}

$webContainer = {Name="web"; Image="anweiss/docker-platynem"; Port="80"}

Answer

Correct Answer: $webContainer = @{Name="web"; Image="anweiss/docker-platynem"; Port="80:80"}

Note: This Question is unanswered, help us to find answer for this one

17.
Choose the correct statement to describe the ENTRYPOINT argument In Dockerfiles.

The ENTRYPOINT argument can be used for executing a specific command.

The ENTRYPOINT specifies a command that will always be executed when the container starts.

The CMD arguments will not be passed to the ENTRYPOINT.

The ENTRYPOINT is the top level directory for you application.

Answer

Correct Answer: The ENTRYPOINT specifies a command that will always be executed when the container starts.

Note: This Question is unanswered, help us to find answer for this one

18.
You can use the Docker repository and its __ to create a Docker image, run a Docker container, and develop code in the container?

Dockerfile

DockerProfile

DockerUser

DockerAdmin

Answer

Correct Answer: Dockerfile

Note: This Question is unanswered, help us to find answer for this one

19.
Choose the correct statement for Webhooks in the Docker Workflow.

Webhooks are configured on a per-repository basis to allow automated builds of your Docker image

Clones the image for the container.

Pulls the container from Docker Hub.

Clones a JSON file which holds a mapping of image names and tags form an external repository

Answer

Correct Answer: Webhooks are configured on a per-repository basis to allow automated builds of your Docker image

Note: This Question is unanswered, help us to find answer for this one

20.
Choose the correct statement to describe the CMD command for Dockerfiles.

The CMD command can be used for executing a specific command when docker container runs.

The CMD command can be used for executing a specific command during an image build.

CMD arguments will be added before ENTRYPOINT parameters.

CMD specifies an immutable command that will always be executed when the container starts.

Answer

Correct Answer: The CMD command can be used for executing a specific command when docker container runs.

Note: This Question is unanswered, help us to find answer for this one

21.
Which command is True for applications to run in containers?

docker run {OPTIONS} IMAGE {COMMAND} {ARG}

docker run [OPTIONS] IMAGE [COMMAND] [ARG…]

docker run {OPTIONS} IMAGE {COMMAND} [ARG…]

docker run [OPTIONS] IMAGE [COMMAND] {ARG…}

Answer

Correct Answer: docker run [OPTIONS] IMAGE [COMMAND] [ARG…]

Note: This Question is unanswered, help us to find answer for this one

22.
Choose the correct statement to describe Docker container namespaces.

Docker container namespaces isolate the container from the rest of the system, and it can only see its own processes.

To give a container a docker namespace you have to run an ssh daemon in each container.

A Docker container namespaces is used when you want to allow multiple users to ssh onto a single container, but you'd like some isolation between these users.

Docker container namespaces control resource consumption.

Answer

Correct Answer: To give a container a docker namespace you have to run an ssh daemon in each container.

Note: This Question is unanswered, help us to find answer for this one

23.
What are the node filters?

containerslots

constraint

port

health

Answer

Correct Answer: containerslots
constraint
port
health

Note: This question has more than 1 correct answers

Note: This Question is unanswered, help us to find answer for this one

24.
Which of the following are true? Check all that apply.

Docker container is the runtime instance of docker image.

Docker Image has two states.

A Docker image is a read-only template.

Each container is an isolated and secure application platform.

Answer

Correct Answer: Docker container is the runtime instance of docker image.
A Docker image is a read-only template.
Each container is an isolated and secure application platform.

Note: This question has more than 1 correct answers

Note: This Question is unanswered, help us to find answer for this one

25.
The is an alpha-numeric string, dots, hyphens, and underscores making up which of the following? Check all that apply.

a default tag (node constraints)

A globbing pattern, for example, abc*

a custom metadata label (nodes or containers)

A regular expression in the form of /regexp/. See re2 syntax for the supported regex syntax

Answer

Correct Answer: A globbing pattern, for example, abc*
A regular expression in the form of /regexp/. See re2 syntax for the supported regex syntax

Note: This question has more than 1 correct answers

Note: This Question is unanswered, help us to find answer for this one

26.
___ is a portable, lightweight runtime and packaging tool.

Docker Engine

Docker Hub

Docker Support

Docker Swarm API

Answer

Correct Answer: Docker Engine

Note: This Question is unanswered, help us to find answer for this one

27.
An external CA is a trusted 3rd party company that provides a means of _____ , and otherwise managing certificates?

creating, deleting, revoking

making, issuing, revoking

creating, issuing, invoking

creating, issuing, revoking

Answer

Correct Answer: creating, issuing, revoking

Note: This Question is unanswered, help us to find answer for this one

28.
Which statement best describes the difference between the COPY and ADD commands in a Dockerfile.

COPY is used to copy a file from a container to the host Add is used to copy a file from a host to the container

COPY only supports the basic copying of local files into the container, while ADD has some features (like local-only tar extraction and remote URL support)

A COPY can move image assets to the container level while ADD is used to copy a file from a host to the container

COPY supports copying of local files into the container while ADD is used to tag multiple versions o an image with a new GUIDs in a repository

Answer

Correct Answer: COPY only supports the basic copying of local files into the container, while ADD has some features (like local-only tar extraction and remote URL support)

Note: This Question is unanswered, help us to find answer for this one

29.
Choose the most correct statement to describe Docker 'cgroups'.

Docker 'cgroups' provide processes with their own view of the system

Docker 'cgroups' allow you to manage the resources of a group of namespaces

Docker 'cgroups' control resource usage

Docker 'cgroups' wrap a resource in an abstraction that makes it appear to the processes that they have their own isolated instance of the esource

Answer

Correct Answer: Docker 'cgroups' control resource usage

Note: This Question is unanswered, help us to find answer for this one

30.
The dockerd options that support the overlay network are?

--cluster-store-opt

--cluster-store

--cluster-advertise

None of the above

Answer

Correct Answer: --cluster-store-opt
--cluster-store
--cluster-advertise

Note: This question has more than 1 correct answers

Note: This Question is unanswered, help us to find answer for this one

31.
How can you run services in the background with docker compose?

docker-compose up -d

docker-compose start -d

docker-compose up --background

docker-compose start --background

Answer

Correct Answer: docker-compose up -d

Note: This Question is unanswered, help us to find answer for this one

32.
The legacy link provided following major functionalities to the default bridge network?

name resolution

name alias for the linked container using --link=CONTAINER-NAME:ALIAS

secured container connectivity (in isolation via --icc=false)

environment variable injection

All of the above

Answer

Correct Answer: All of the above

Note: This Question is unanswered, help us to find answer for this one

33.
Garbage collection can be run using the following command?

bin/registry garbage-collect -dry-run /path/to/config.yml

bin/registry garbage-collect [--dry-run] /path/to/config.yml

bin/registry garbage-collect [dry-run] /path/to/config.yml

bin/registry garbage collect [dry-run] /path/to/config.yml

Answer

Correct Answer: bin/registry garbage-collect [--dry-run] /path/to/config.yml

Note: This Question is unanswered, help us to find answer for this one

34.
The cluster management and orchestration features embedded in the Docker Engine are built using?

DockerEngine

SwarmKit

DockerKit

None of the above

Answer

Correct Answer: SwarmKit

Note: This Question is unanswered, help us to find answer for this one

35.
Which command is used to list services in a swarm?

service ls

swarm ls

swarm service ls

Both A and C

Answer

Correct Answer: service ls

Note: This Question is unanswered, help us to find answer for this one

36.
At a high-level, which of the following steps will you use to integrate UCP with DRT?

Configure the Docker Engine running on each UCP node to trust DTR

Configure UCP to know about DTR

Configure DTR to trust UCP

Configure the Docker Engine API running on single UCP node

Answer

Correct Answer: Configure the Docker Engine running on each UCP node to trust DTR
Configure UCP to know about DTR
Configure DTR to trust UCP

Note: This question has more than 1 correct answers

Note: This Question is unanswered, help us to find answer for this one

37.
Using the following command to create a new swarm?

docker swarm init advertise-addr <MANAGER-IP>

docker swarm init --advertise-addr MANAGER-IP

docker swarm init --advertise-addr <MANAGER-IP>

docker swarm init advertise-addr MANAGER-IP

Answer

Correct Answer: docker swarm init --advertise-addr <MANAGER-IP>

Note: This Question is unanswered, help us to find answer for this one

38.
___ is a cloud service for sharing applications and automating workflows.

Docker Machine

Docker Hub

Docker Engine

None of the above

Answer

Correct Answer: Docker Hub

Note: This Question is unanswered, help us to find answer for this one

39.
Which of the following statement True of Docker Machine?

a tool for provisioning and managing your Dockerized hosts

a client-server application made up of docker daemon, api interfaces for interacting with daemon and a CLI client that talks to the daemon

A clustering tool for docker

A tool for automatic deployment of docker containers

Answer

Correct Answer: a tool for provisioning and managing your Dockerized hosts

Note: This Question is unanswered, help us to find answer for this one

40.
What does the docker swarm command “swarm join” do?

Join two swarms

Join a swarm as a manager node or worker node

Join a node to another node to create a new swarm

None

Answer

Correct Answer: Join a swarm as a manager node or worker node

Note: This Question is unanswered, help us to find answer for this one

41.
Which of the following is True? In Docker, when a container is exited

The state of the filesystem and the processes are not preserved

The state of the filesystem is not stored but the state of the processes are stored

The state of the filesystem is stored but the processes are not

The state of the filesystem and the processes are preserved

Answer

Correct Answer: The state of the filesystem is stored but the processes are not

Note: This Question is unanswered, help us to find answer for this one

42.
Swarm agents are responsible for hosting containers. They are regular docker daemons and you can communicate with them using the ___?

Docker Support

Docker Swarm API

Docker remote API

None of the above

Answer

Correct Answer: None of the above

Note: This Question is unanswered, help us to find answer for this one

43.
For the 'docker-compose.yml' fragment below

scala:

build: ./scala

expose:

    - 40000-50000

ports:

    - 9000:9000

    - 4040:4040

links:

    - mongo

volumes:

    - ../../:/root/cardio

    - ~/.ivy2:/root/.ivy2

    - ~/.sbt:/root/.sbt

stdin_open: true

mongo:

image: mongo

volumes_from:

    - data

ports:

    - "27017:27017"

Choose the most correct statement to describe the 'links' block

Allows the container to be linked with ALL instances of the mongo service , but each with different alias

Allows the container to be linked with ALL instances of the mongo service

You need to explicitly declare this to link with the mongo service when running in the same host

This is required so you do not need to stop, remove, and run the container when running in a different host to generate the link

Answer

Correct Answer: Allows the container to be linked with ALL instances of the mongo service , but each with different alias

Note: This Question is unanswered, help us to find answer for this one

44.
Docker containers can be

run, started, stopped, and deleted

started, stopped, moved, and deleted

started, stopped, and deleted

run, started, stopped, moved, and deleted

Answer

Correct Answer: run, started, stopped, moved, and deleted

Note: This Question is unanswered, help us to find answer for this one

45.
Choose the best description of the difference between a Docker container and a Linux process.

A container is basically a process, there is no practical diference

The diference between a container over a process is some extra kernel resources to manage namespaces, file systems and control groups

process supervision is only provided in a Docker container

A container only uses Linux processes for initialization, for everything else it uses threads

Answer

Correct Answer: The diference between a container over a process is some extra kernel resources to manage namespaces, file systems and control groups

Note: This Question is unanswered, help us to find answer for this one

46.
Multiple containers share the same kernel, but each container can be constrained to only use a defined amount of resources such as _____ , memory and I/O?

Network

CPU

Server

None of the above

Answer

Correct Answer: CPU

Note: This Question is unanswered, help us to find answer for this one

47.
The default Engine and Swarm ports for TLS are?

Swarm manager: 3376/tcp

Authentication using TLS

Engine daemon: 2376/tcp

Network access control

Answer

Correct Answer: Swarm manager: 3376/tcp
Engine daemon: 2376/tcp

Note: This question has more than 1 correct answers

Note: This Question is unanswered, help us to find answer for this one

48.
Can data volume containers be used/mounted in containers residing on other hosts within a docker swarm?

Docker, by itself, does not provide any facility for either migrating data or sharing data between hosts in a cluster

Yes Docker provides for migrating data or sharing data between hosts in a cluster with links and the new networking functionality

Docker provides for migrating data via volumes in a Docker swarm

This is possible when you use a cluster file-system

Answer

Correct Answer: Docker, by itself, does not provide any facility for either migrating data or sharing data between hosts in a cluster

Note: This Question is unanswered, help us to find answer for this one

49.
Which statement correctly describes a ‘docker.sock’.

By default, a unix domain socket (or IPC socket) is created at /lib/var/docker.sock

The docker command line tool contacts the docker daemon process via a UNIX domain socket socket at /var/run/docker.sock

docker.sock runs on 32-bit linux kernels only

DOCKER_SOCK is the environment variable that must be set.

Answer

Correct Answer: The docker command line tool contacts the docker daemon process via a UNIX domain socket socket at /var/run/docker.sock

Note: This Question is unanswered, help us to find answer for this one

50.
Choose the correct statement for Docker Swarm

Docker Swarm provides a common interface onto the many orchestration and scheduling frameworks.

Generic provisioning solution for Docker deployment.

A new LXC container environment.

Docker Swarm will act as Docker server to run Docker Containers.

Answer

Correct Answer: Docker Swarm provides a common interface onto the many orchestration and scheduling frameworks.

Note: This Question is unanswered, help us to find answer for this one

51.
Docker is an open platform for developers and __ to build, ship, and run distributed application?

sysadmins

admin

sysadmin

All of the above

Answer

Correct Answer: sysadmins

Note: This Question is unanswered, help us to find answer for this one

52.
In docker, a union file system is the union of ?

All read-write layers

Read-write layer and all read-only layers

All read-only layers

Answer

Correct Answer: Read-write layer and all read-only layers

Note: This Question is unanswered, help us to find answer for this one

53.
Docker diff command has 3 events listed in it. They are

N-New; U-Update; R-Remove;

A-Add; D-Delete; C-Change;

U-Update; D-Delete; C-Create;

None

Answer

Correct Answer: A-Add; D-Delete; C-Change;

Note: This Question is unanswered, help us to find answer for this one

54.
The Docker client and daemon can communicate via?

Sockets

RESTful API

Both1 and 2

None

Answer

Correct Answer: Both1 and 2

Note: This Question is unanswered, help us to find answer for this one

55.
What are the two major Docker components?

Container and image

Docker and docker-hub

Container and docker-hub

Docker and Container

Answer

Correct Answer: Docker and docker-hub

Note: This Question is unanswered, help us to find answer for this one

56.
How will a server running multiple Docker containers handle the TCP limitation?

The total cap of TCP connections will be capped by the Docker host

The Docker host will use 'netfilter' in the Linux kernel to register callback functions with the network stack.

The Docker host will use 'netlink' in the Linux kernel to register callback functions with the network stack

By providing a full-duplex communication link.

Answer

Correct Answer: The total cap of TCP connections will be capped by the Docker host

Note: This Question is unanswered, help us to find answer for this one

57.
When using 'systemd' your docker containers start but get shut down instantly. Choose the best explanation for why this may be happening.

You are not using 'systemctl' to start the container

You have not specified a Type in your systemd unit file

'systemd' is trying to start up groups of processes calling a service without correct permissions

The DefaultDependencies= is set to true but service units can not find needed dependencies

Answer

Correct Answer: You have not specified a Type in your systemd unit file

Note: This Question is unanswered, help us to find answer for this one

58.
Which statement best describes how Docker's Containers are different to Virtual Machines?

A Virtual Machine gives you the ability to snapshot the OS into a shared image. With a Docker Container runs in a shared OS.

A Virtual Machine can be cloned , Docker containers can not be cloned.

A Docker containers runs in the same kernel as it's host. A Virtual Machine gets it's own kernel.

Docker containers can be more portable than a Virtual Machine.

Answer

Correct Answer: A Docker containers runs in the same kernel as it's host. A Virtual Machine gets it's own kernel.

Note: This Question is unanswered, help us to find answer for this one

59.
Which of the following is true?

Processes running within a container can see, and but not affect, processes running in another container, or in the host system.

Processes running within a container cannot see, and even less affect, processes running in another container, or in the host system.

Processes running within a container can see, and even affect, processes running in another container, or in the host system.

Processes running within a container cannot see, and but affect, processes running in another container, or in the host system

Answer

Correct Answer: Processes running within a container cannot see, and even less affect, processes running in another container, or in the host system.

Note: This Question is unanswered, help us to find answer for this one

60.
Docker can be integrated into various infrastructure tools, including?

Amazon Web Services

Google Cloud Platform

IBM Bluemix

Microsoft Azure

Apache Flash Builder

Answer

Correct Answer: Amazon Web Services
Google Cloud Platform
IBM Bluemix
Microsoft Azure

Note: This question has more than 1 correct answers

Note: This Question is unanswered, help us to find answer for this one

61.
Custom, cross-host container networks are?

Inbound 7946/tcp

Inbound 7946/udp

Inbound

489/udp

Answer

Correct Answer: Inbound 7946/tcp
Inbound 7946/udp
Inbound

Note: This question has more than 1 correct answers

Note: This Question is unanswered, help us to find answer for this one

62.
The container configuration filters are?

affinity

dependency

port

infinite

Answer

Correct Answer: affinity
dependency
port

Note: This question has more than 1 correct answers

Note: This Question is unanswered, help us to find answer for this one

63.
The “exec” command in docker is used to

Export a container’s filesystem

Run a command in a running container

Execute a stopped container

None

Answer

Correct Answer: Run a command in a running container

Note: This Question is unanswered, help us to find answer for this one

64.
Docker Universal Control Plane (UCP) is the enterprise-grade cluster management solution from?

Images

Docker

Swarm

LDAP

Answer

Correct Answer: Docker

Note: This Question is unanswered, help us to find answer for this one

65.
Containers on the network ___ DNS mappings for the service via gossip so any container on the network can access the service via its service name?

transfer

configure

setup

Answer

Correct Answer: share

Note: This Question is unanswered, help us to find answer for this one

66.
Which statement best describes Docker as a technology innovation.

Docker allows containers to be easier and safer to deploy and use.

Docker is driving standardization for containers.

Docker allows developers to pack, ship, and run any application to a lightweight, portable, self sufficient consistent production environment.

Docker containers that don't need an operating system kernel of their own, allow applications to run on a server.

Answer

Correct Answer: Docker allows developers to pack, ship, and run any application to a lightweight, portable, self sufficient consistent production environment.

Note: This Question is unanswered, help us to find answer for this one

67.
Docker is

a software containerization platform

an automatic deployment tool

a continuous integration platform

All of the above

Answer

Correct Answer: a software containerization platform

Note: This Question is unanswered, help us to find answer for this one

68.
Scheduling strategies are how Swarm decides which nodes on a cluster to start containers on. Swarm supports the following strategies?

binpack

random

spread

None of the above

Answer

Correct Answer: binpack
random
spread

Note: This question has more than 1 correct answers

Note: This Question is unanswered, help us to find answer for this one

69.
For the following 'docker-compose.yml' fragement scala: build: ./scala expose: - 40000-50000 ports: - 9000:9000 - 4040:4040 links: - mongo volumes: - ../../:/root/cardio - ~/.ivy2:/root/.ivy2 - ~/.sbt:/root/.sbt stdin_open: true Choose the most correct statement to describe the ' volumes' command as it appears in the code.

The ' volumes' command is used here to enable access from your container to a directory on the host machine.

The ' volumes' command is only useful for images that are going to be built FROM a given image

The ' volumes' command is used here to isolate the directories as they are explicitly named

The ' volumes' command is used here to link with other imported docker-compose.yml files

Answer

Correct Answer: The ' volumes' command is used here to enable access from your container to a directory on the host machine.

Note: This Question is unanswered, help us to find answer for this one

70.
Which command is used to show all running containers?

docker ps

docker list

docker list --all

docker ps --all

Answer

Correct Answer: docker ps

Note: This Question is unanswered, help us to find answer for this one

71.
The docker compose sub-command “up” is used to?

A)Start containers

B)Create containers

C)Both A and B

D)Delete containers

Answer

Correct Answer: C)Both A and B

Note: This Question is unanswered, help us to find answer for this one

72.
Can an individual Docker container, for example a web server, that exposes (listens on) a port be started using systemd's socket activation feature?

It is not possible using default docker implementation

It is possible using a third party tool

It is possible using default docker implementation and a correct systemd unit file

It is possible using default docker implementation and a correct systemd socket descriptor

Answer

Correct Answer: It is not possible using default docker implementation

Note: This Question is unanswered, help us to find answer for this one

73.
How do links and scaling work together in docker compose?

When scaling a container from a compose application you need to use the new multi-host networking functionality to connect containers across different physical or virtual hosts

When scaling a container from a compose application you need to use 'links' to connect containers across different physical or virtual hosts

You can only scale an unlinked container

Using 'links' ensures connections will be created to the newly scaled instances

Answer

Correct Answer: When scaling a container from a compose application you need to use the new multi-host networking functionality to connect containers across different physical or virtual hosts

Note: This Question is unanswered, help us to find answer for this one

74.
What does the docker management command dockerd do?

Launch the Docker daemon

Stop the docker daemon

Show the Docker version information

Display system-wide information

Answer

Correct Answer: Launch the Docker daemon

Note: This Question is unanswered, help us to find answer for this one

75.
What format of compose files are supported by docker?

YAML

JSON

Both YAML and JSON

None

Answer

Correct Answer: Both YAML and JSON

Note: This Question is unanswered, help us to find answer for this one

76.
What is the command used to convert a container into an image?

docker diff

docker run

docker commit

docker push

Answer

Correct Answer: docker commit

Note: This Question is unanswered, help us to find answer for this one

77.
Which statement best describes the possible security implications of public docker images

If you accidentally publish a credential(s), Delete the public image and update the credentials on whatever system(s) it has compromised

Data in a Docker volume is preserved as part of the docker commit operation so dont store credentials in volumes such as external api access keys

If a Docker image is deleted from the Docker Index then any sensitive data exposed will be safe

If a Docker image is deleted from the Docker Hub then any sensitive data exposed will be safe

Answer

Correct Answer: If you accidentally publish a credential(s), Delete the public image and update the credentials on whatever system(s) it has compromised

Note: This Question is unanswered, help us to find answer for this one

78.
Which of the following is NOT a valid docker command for images?

build

commit

rmi

pause

Answer

Correct Answer: pause

Note: This Question is unanswered, help us to find answer for this one

79.
Which of the following is NOT true?

Compose is a tool for defining and running multi-container Docker applications.

Services that make up your app is defined in docker-compose.yml file

JSON format can be used for dockerfiles.

Docker ps is used to list all running containers

Answer

Correct Answer: JSON format can be used for dockerfiles.

Note: This Question is unanswered, help us to find answer for this one

80.
The command to list all currently available images is?

docker list

docker images

docker ps

None

Answer

Correct Answer: docker images

Note: This Question is unanswered, help us to find answer for this one

81.
Signed manifests include an image manifest and a list of signatures generated by libtrust. A signature consists of the following fields?

signature

header

protected

None of the above

Answer

Correct Answer: signature
header
protected

Note: This question has more than 1 correct answers

Note: This Question is unanswered, help us to find answer for this one

82.
Choose the correct statement to describe the Docker repository

You can tag an image, and store multiple versions of that image with different GUIDs in a single named repository

A repository is a collection of containers tracked by GUIDs.

A repositoriy must e tied to a username.

A repository namespace has a specific schema so that the search index can determine the container id and location

Answer

Correct Answer: You can tag an image, and store multiple versions of that image with different GUIDs in a single named repository

Note: This Question is unanswered, help us to find answer for this one

83.
Which statement correctly describes a docker image.

A docker image is a self contained runtime environment

A docker image allows you to write the applications resources to the file-system in layers.

An image is a read only layer used to build a container. They do not change

A docker image is just an operating system

Answer

Correct Answer: An image is a read only layer used to build a container. They do not change

Note: This Question is unanswered, help us to find answer for this one

84.
Choose the correct statement

The command 'docker images' creates images

The command 'docker load' loads a container

The command 'docker save' saves a container

The command 'docker rmi' removes an image

Answer

Correct Answer: The command 'docker rmi' removes an image

Note: This Question is unanswered, help us to find answer for this one

85.
The “rmi” command in docker is used to?

Save docker images to a tar archive

Remove one or more docker images

More image in remote to a different location

None

Answer

Correct Answer: Remove one or more docker images

Note: This Question is unanswered, help us to find answer for this one

Docker MCQs | Topic-wise

MCQ on Basic Docker

General Docker MCQs

Docker Subjects

More Resources

Docker MCQ

Docker Skill Assessment

Docker PDF

Related MCQs

DOS MCQs

Dropbox MCQs

Drupal MCQs

Ebay Development MCQs

Eclipse MCQs

Basic Docker MCQ

1. Choose the correct statement for Docker Compose.

2. Swarm currently supports following values?

3. How wll manager nodes handle cluster management tasks? (choose all that apply)

4. A fast way to remove a dangling image is to use the following command:

5. Swarm supports the following backend discovery services?

6. Which statement is True of Docker swarm?

7. Which statement is correct about Service discovery?

8. How can you configure the LDAP integration?

9. Choose the correct statement to describe the contents directory found under the filesystem location shown below. /var/lib/docker

10. Choose the correct statement to describe the Docker Hub in the Docker Workflow.

11. The Docker zfs storage driver makes extensive use of the following ZFS datasets:

12. Choose the correct statement for Automated Builds in the Docker Workflow.

13. Choose the correct statement to describe the Docker File entry below. FROM ubuntu

14. Choose the correct statement to describe Docker.

16. How can you create a hashtable with the settings for your container?

17. Choose the correct statement to describe the ENTRYPOINT argument In Dockerfiles.

18. You can use the Docker repository and its __ to create a Docker image, run a Docker container, and develop code in the container?

19. Choose the correct statement for Webhooks in the Docker Workflow.

20. Choose the correct statement to describe the CMD command for Dockerfiles.

21. Which command is True for applications to run in containers?

22. Choose the correct statement to describe Docker container namespaces.

23. What are the node filters?

24. Which of the following are true? Check all that apply.

25. The is an alpha-numeric string, dots, hyphens, and underscores making up which of the following? Check all that apply.

26. ___ is a portable, lightweight runtime and packaging tool.

27. An external CA is a trusted 3rd party company that provides a means of _____ , and otherwise managing certificates?

28. Which statement best describes the difference between the COPY and ADD commands in a Dockerfile.

29. Choose the most correct statement to describe Docker 'cgroups'.

30. The dockerd options that support the overlay network are?

31. How can you run services in the background with docker compose?

32. The legacy link provided following major functionalities to the default bridge network?

33. Garbage collection can be run using the following command?

34. The cluster management and orchestration features embedded in the Docker Engine are built using?

35. Which command is used to list services in a swarm?

36. At a high-level, which of the following steps will you use to integrate UCP with DRT?

37. Using the following command to create a new swarm?

38. ___ is a cloud service for sharing applications and automating workflows.

39. Which of the following statement True of Docker Machine?

40. What does the docker swarm command “swarm join” do?

41. Which of the following is True? In Docker, when a container is exited

42. Swarm agents are responsible for hosting containers. They are regular docker daemons and you can communicate with them using the ___?

44. Docker containers can be

45. Choose the best description of the difference between a Docker container and a Linux process.

46. Multiple containers share the same kernel, but each container can be constrained to only use a defined amount of resources such as _____ , memory and I/O?

47. The default Engine and Swarm ports for TLS are?

48. Can data volume containers be used/mounted in containers residing on other hosts within a docker swarm?

49. Which statement correctly describes a ‘docker.sock’.

50. Choose the correct statement for Docker Swarm

51. Docker is an open platform for developers and __ to build, ship, and run distributed application?

52. In docker, a union file system is the union of ?

53. Docker diff command has 3 events listed in it. They are

54. The Docker client and daemon can communicate via?

55. What are the two major Docker components?

56. How will a server running multiple Docker containers handle the TCP limitation?

57. When using 'systemd' your docker containers start but get shut down instantly. Choose the best explanation for why this may be happening.

58. Which statement best describes how Docker's Containers are different to Virtual Machines?

59. Which of the following is true?

60. Docker can be integrated into various infrastructure tools, including?

61. Custom, cross-host container networks are?

62. The container configuration filters are?

63. The “exec” command in docker is used to

64. Docker Universal Control Plane (UCP) is the enterprise-grade cluster management solution from?

65. Containers on the network ___ DNS mappings for the service via gossip so any container on the network can access the service via its service name?

66. Which statement best describes Docker as a technology innovation.

67. Docker is

68. Scheduling strategies are how Swarm decides which nodes on a cluster to start containers on. Swarm supports the following strategies?

70. Which command is used to show all running containers?

71. The docker compose sub-command “up” is used to?

72. Can an individual Docker container, for example a web server, that exposes (listens on) a port be started using systemd's socket activation feature?

73. How do links and scaling work together in docker compose?

74. What does the docker management command dockerd do?

75. What format of compose files are supported by docker?

76. What is the command used to convert a container into an image?

77. Which statement best describes the possible security implications of public docker images

78. Which of the following is NOT a valid docker command for images?

79. Which of the following is NOT true?

80. The command to list all currently available images is?

81. Signed manifests include an image manifest and a list of signatures generated by libtrust. A signature consists of the following fields?

82. Choose the correct statement to describe the Docker repository

3.
How wll manager nodes handle cluster management tasks? (choose all that apply)

4.
A fast way to remove a dangling image is to use the following command:

5.
Swarm supports the following backend discovery services?

6.
Which statement is True of Docker swarm?

7.
Which statement is correct about Service discovery?

8.
How can you configure the LDAP integration?

9.
Choose the correct statement to describe the contents directory found under the filesystem location shown below. /var/lib/docker

10.
Choose the correct statement to describe the Docker Hub in the Docker Workflow.

11.
The Docker zfs storage driver makes extensive use of the following ZFS datasets:

12.
Choose the correct statement for Automated Builds in the Docker Workflow.

13.
Choose the correct statement to describe the Docker File entry below. FROM ubuntu

14.
Choose the correct statement to describe Docker.

16.
How can you create a hashtable with the settings for your container?

17.
Choose the correct statement to describe the ENTRYPOINT argument In Dockerfiles.

18.
You can use the Docker repository and its __ to create a Docker image, run a Docker container, and develop code in the container?

19.
Choose the correct statement for Webhooks in the Docker Workflow.

20.
Choose the correct statement to describe the CMD command for Dockerfiles.

21.
Which command is True for applications to run in containers?

22.
Choose the correct statement to describe Docker container namespaces.

23.
What are the node filters?

24.
Which of the following are true? Check all that apply.

25.
The is an alpha-numeric string, dots, hyphens, and underscores making up which of the following? Check all that apply.

26.
___ is a portable, lightweight runtime and packaging tool.

27.
An external CA is a trusted 3rd party company that provides a means of _____ , and otherwise managing certificates?

28.
Which statement best describes the difference between the COPY and ADD commands in a Dockerfile.

29.
Choose the most correct statement to describe Docker 'cgroups'.

30.
The dockerd options that support the overlay network are?

31.
How can you run services in the background with docker compose?

32.
The legacy link provided following major functionalities to the default bridge network?

33.
Garbage collection can be run using the following command?

34.
The cluster management and orchestration features embedded in the Docker Engine are built using?

35.
Which command is used to list services in a swarm?

36.
At a high-level, which of the following steps will you use to integrate UCP with DRT?

37.
Using the following command to create a new swarm?

38.
___ is a cloud service for sharing applications and automating workflows.

39.
Which of the following statement True of Docker Machine?

40.
What does the docker swarm command “swarm join” do?

41.
Which of the following is True? In Docker, when a container is exited

42.
Swarm agents are responsible for hosting containers. They are regular docker daemons and you can communicate with them using the ___?

44.
Docker containers can be

45.
Choose the best description of the difference between a Docker container and a Linux process.

46.
Multiple containers share the same kernel, but each container can be constrained to only use a defined amount of resources such as _____ , memory and I/O?

47.
The default Engine and Swarm ports for TLS are?

48.
Can data volume containers be used/mounted in containers residing on other hosts within a docker swarm?

49.
Which statement correctly describes a ‘docker.sock’.

50.
Choose the correct statement for Docker Swarm

51.
Docker is an open platform for developers and __ to build, ship, and run distributed application?

52.
In docker, a union file system is the union of ?

53.
Docker diff command has 3 events listed in it. They are

54.
The Docker client and daemon can communicate via?

55.
What are the two major Docker components?

56.
How will a server running multiple Docker containers handle the TCP limitation?

57.
When using 'systemd' your docker containers start but get shut down instantly. Choose the best explanation for why this may be happening.

58.
Which statement best describes how Docker's Containers are different to Virtual Machines?

59.
Which of the following is true?

60.
Docker can be integrated into various infrastructure tools, including?

61.
Custom, cross-host container networks are?

62.
The container configuration filters are?

63.
The “exec” command in docker is used to

64.
Docker Universal Control Plane (UCP) is the enterprise-grade cluster management solution from?

65.
Containers on the network ___ DNS mappings for the service via gossip so any container on the network can access the service via its service name?

66.
Which statement best describes Docker as a technology innovation.

67.
Docker is

68.
Scheduling strategies are how Swarm decides which nodes on a cluster to start containers on. Swarm supports the following strategies?

70.
Which command is used to show all running containers?

71.
The docker compose sub-command “up” is used to?

72.
Can an individual Docker container, for example a web server, that exposes (listens on) a port be started using systemd's socket activation feature?

73.
How do links and scaling work together in docker compose?

74.
What does the docker management command dockerd do?

75.
What format of compose files are supported by docker?

76.
What is the command used to convert a container into an image?

77.
Which statement best describes the possible security implications of public docker images

78.
Which of the following is NOT a valid docker command for images?

79.
Which of the following is NOT true?

80.
The command to list all currently available images is?

81.
Signed manifests include an image manifest and a list of signatures generated by libtrust. A signature consists of the following fields?

82.
Choose the correct statement to describe the Docker repository

83.
Which statement correctly describes a docker image.

84.
Choose the correct statement

85.
The “rmi” command in docker is used to?