Which of the following values would be valid in the FROM statement in a Dockerfile?

Question

Options

• Aubuntu:focal
• Bdocker://ubuntu: focal
• Cregistry:ubuntu:focal
• Dfile:/tmp/ubuntu/Dockerfile

• A
  79% (31)
• B
  13% (5)
• C
  5% (2)
• D
  3% (1)

Explanation

The FROM statement in a Dockerfile specifies the base image from which the subsequent instructions are executed. The value of the FROM statement can be either an image name, an image name with a tag, or an image ID. The image name can be either a repository name or a repository name with a registry prefix. For example, ubuntu is a repository name, and docker.io/ubuntu is a repository name with a registry prefix. The tag is an optional identifier that can be used to specify a particular version or variant of an image. For example, ubuntu:focal refers to the image with the focal tag in the ubuntu repository. The image ID is a unique identifier that is automatically generated when an image is built or pulled. For example, sha256:9b0dafaadb1cd1d14e4db51bd0f4c0d56b6b551b2982b2b7c637ca143ad605d2 is an Therefore, the only valid value in the FROM statement among the given options is ubuntu:focal, which is an image name with a tag.

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