Question

What is the directive in a Dockerfile that sets the author of the generated image?

A) MAINTAINER
B) AUTHOR
C) OWNER
D) CREATOR

Answer 1

The directive in a Dockerfile that sets the author of the generated image is A) MAINTAINER.

Step-by-step explanation:

The MAINTAINER directive in a Dockerfile is used to set the author or maintainer information for the generated image. This metadata provides details about the person or organization responsible for maintaining the Dockerfile or the image. While historically used for specifying the image maintainer, it's worth noting that the MAINTAINER directive is considered deprecated, and the preferred practice is to use the LABEL directive for this purpose. Labels provide a more flexible and structured way to include metadata in Docker images, including information about the author.

In the context of Dockerfile best practices, using LABEL with "maintainer" is recommended over the deprecated MAINTAINER directive. This ensures compatibility with newer versions of Docker and aligns with the evolving standards in Dockerfile syntax.

Therefore, the correct choice for setting the author in a Dockerfile is A) MAINTAINER, but it's advised to adopt the LABEL directive for this purpose for better compatibility and future-proofing your Dockerfiles.

Answer 2

The correct directive in a Dockerfile that sets the author of the generated image is "MAINTAINER."

thus correct option is A) MAINTAINER

Step-by-step explanation:

The correct directive in a Dockerfile that sets the author of the generated image is "MAINTAINER." This directive was commonly used in earlier versions of Docker but has been deprecated in favor of the "LABEL" directive for adding metadata to an image.

In Docker, a Dockerfile is a script that contains instructions for building a Docker image. The "MAINTAINER" directive was initially used to specify the name and email address of the image maintainer. However, with changes in best practices and the evolution of Docker, it was recommended to use the more versatile "LABEL" directive for setting metadata, including the image author.

Using the "LABEL" directive allows developers to add key-value metadata to their Docker images, providing more flexibility and clarity in describing various aspects of the image, such as version, description, and author. Therefore, while "MAINTAINER" was historically used for this purpose, the up-to-date and recommended approach is to use the "LABEL" directive to set the author and other relevant metadata in a Dockerfile.

thus correct option is A) MAINTAINER