Dockerfile MCQs with answers Page - 2

You will find multiple-choice questions (MCQs) related to #Dockerfile here. Go through these questions to prepare effectively for your upcoming exams and interviews.

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A

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Q. What is the effect of using multiple RUN commands in a Dockerfile?

  • (A) Creates multiple layers
  • (B) Overwrites previous instructions
  • (C) Merges commands into one layer
  • (D) Deletes temporary files

A

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Q. Which best practice helps reduce Docker image size?

  • (A) Use multiple COPY instructions
  • (B) Use large base images
  • (C) Combine RUN commands with &&
  • (D) Avoid ENV instructions

A

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Q. What does the VOLUME instruction do?

  • (A) Deletes temporary data
  • (B) Mounts host folder during build
  • (C) Creates a mount point for persistent data
  • (D) Sets working directory

A

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Q. What is a multi-stage build in Dockerfile?

  • (A) Using multiple Dockerfiles
  • (B) Running multiple containers
  • (C) Using multiple base images to reduce final image size
  • (D) Combining Docker Compose files

A

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Q. Which command builds a Docker image from a Dockerfile?

  • (A) docker run
  • (B) docker pull
  • (C) docker build
  • (D) docker start

A

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Q. Where is the default context path when building a Dockerfile?

  • (A) /root
  • (B) The path where the Dockerfile is located
  • (C) /usr/bin
  • (D) /etc/docker

A

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Q. Which instruction is used to switch the user in a Dockerfile?

  • (A) GROUP
  • (B) ENV
  • (C) USER
  • (D) EXEC

A

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Q. Which of the following is not a valid Dockerfile instruction?

  • (A) FROM
  • (B) COPY
  • (C) PUSH
  • (D) RUN

A

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Q. Where is the best place to put a `.dockerignore` file?

  • (A) Inside /etc
  • (B) Outside the Dockerfile directory
  • (C) In the same directory as Dockerfile
  • (D) In /usr/bin

A

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Q. Which instruction in Dockerfile is used to specify the base image?

  • (A) BASE
  • (B) FROM
  • (C) IMAGE
  • (D) START

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