Tag an image with the latest tag

Question

If you have an image with the name `my-image:1.0` and you run the command `docker tag my-image:1.0 my-image:latest`, what happens?

Accepted Answer

`my-image:1.0` is also referenced under the `my-image:latest` tag, but no new image is created.

Answer

Nothing, because no two images can have the same name.

Answer

A new image `my-image:latest` is created from scratch.

Answer

The image `my-image:1.0` is deleted and replaced by `my-image:latest`.

Question from the Docker test