Docker Objective Questions with Answers & Explanations

This Docker quiz contains carefully curated objective questions with correct answers and clear explanations. It is designed for developers, DevOps engineers, and interview preparation, covering containerization fundamentals and best practices.

Practice Docker MCQs with Detailed Explanations

Answer at least 12 questions to submit.

What is Docker primarily used for?

Easy

Virtualizing hardware

Containerizing applications

Managing databases

Compiling source code

Which Docker component is responsible for building images?

Easy

Docker Engine

Docker Hub

Dockerfile

Docker Registry

Which command is used to check the Docker version?

Easy

docker info

docker --version

docker status

docker check

What is a Docker image?

Easy

A running container

A stopped container

A blueprint for containers

A virtual machine

What is a Docker container?

Easy

A running instance of an image

A Docker configuration file

A storage volume

A network bridge

Which command is used to list running containers?

Easy

docker ps

docker ls

docker images

docker containers

Which command stops a running container?

Easy

docker kill

docker stop

docker halt

docker pause

Which file defines multi-container Docker applications?

Medium

Dockerfile

docker-compose.yml

container.yml

stack.yml

Which Docker command builds an image from a Dockerfile?

Easy

docker run

docker create

docker build

docker pull

Which instruction specifies the base image in a Dockerfile?

Easy

RUN

FROM

CMD

ENTRYPOINT

Which instruction runs commands during image build time?

Easy

CMD

ENTRYPOINT

RUN

EXEC

Which instruction defines the default command for a container?

Medium

RUN

FROM

CMD

COPY

Which instruction copies files from host to image?

Easy

ADD

MOVE

TRANSFER

PUSH

What is Docker Hub?

Easy

A container runtime

An image registry

A monitoring tool

A build system

Which command downloads an image from a registry?

Easy

docker fetch

docker pull

docker clone

docker load

Docker Objective Questions and Answers

Practice Docker MCQs with Detailed Explanations

What is Docker primarily used for?

Which Docker component is responsible for building images?

Which command is used to check the Docker version?

What is a Docker image?

What is a Docker container?

Which command is used to list running containers?

Which command stops a running container?

Which file defines multi-container Docker applications?

Which Docker command builds an image from a Dockerfile?

Which instruction specifies the base image in a Dockerfile?

Which instruction runs commands during image build time?

Which instruction defines the default command for a container?

Which instruction copies files from host to image?

What is Docker Hub?

Which command downloads an image from a registry?

Other Objective Questions

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