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WithoutBook LIVE Mock Interviews Docker Related interview subjects: 74

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Know the top Docker interview questions and answers for freshers and experienced candidates to prepare for job interviews.

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The Best LIVE Mock Interview - You should go through before interview

Know the top Docker interview questions and answers for freshers and experienced candidates to prepare for job interviews.

Interview Questions and Answers

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Freshers / Beginner level questions & answers

Ques 1

What is Docker?

Docker is a containerization platform that allows developers to package, distribute, and run applications in isolated environments called containers.

Example:

docker run -d -p 80:80 nginx
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Ques 2

What is the purpose of Dockerfile?

Dockerfile is a script that contains instructions for building a Docker image. It specifies the base image, application code, dependencies, and other configurations.

Example:

FROM ubuntu
RUN apt-get update && apt-get install -y nginx
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Ques 3

What is the difference between a Docker image and a Docker container?

An image is a lightweight, standalone, and executable package that includes everything needed to run a piece of software. A container is a runtime instance of a Docker image.

Example:

docker run -d my_image
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Ques 5

How do you check the logs of a running Docker container?

You can use the `docker logs` command followed by the container ID or name to view the logs of a running container.

Example:

docker logs container_name
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Ques 8

How do you pass environment variables to a Docker container?

Environment variables can be passed to a Docker container using the `-e` or `--env` option with the `docker run` command.

Example:

docker run -e MY_VARIABLE=value my_image
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Ques 10

How do you build a Docker image from a Dockerfile?

You can use the `docker build` command followed by the path to the directory containing the Dockerfile.

Example:

docker build -t my_image:latest .
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