DCA Exam Dumps : Docker Certified Associate (DCA) Exam

While removing push access from all other users can prevent an image from being overwritten, it’s not the only way and might not be the most efficient or practical solution, especially in a collaborative environment. Docker Trusted Registry (DTR) provides a feature called ‘Immutable Tags’ which can be used to prevent an image, such as ‘nginx:latest’, from being overwritten. Once a tag is marked as immutable, DTR will prevent any user from pushing the same tag to the repository, thus preserving the image. This allows for better version control and prevents accidental overwrites. Therefore, the solution to prevent an image from being overwritten is not just to remove push access from all other users, but to use the features provided by DTR like ‘Immutable Tags’.

= Multi-stage builds allow you to use multiple FROM statements in your Dockerfile, each starting a new stage of the build1. This can help you achieve better logical separation of Dockerfile instructions for increased readability, as well as other benefits such as smaller image size, faster build time, and reduced security risks23. By separating your Dockerfile into different stages, you can organize your instructions by their purpose, such as building, testing, or deploying your application. You can also copy only the artifacts you need from one stage to another, leaving behind the unnecessary dependencies or tools1. This can make your Dockerfile easier to read and maintain, as well as improve the performance and security of your final image. References:

Multi-stage builds | Docker Docs

What Are Multi-Stage Docker Builds? - How-To Geek

Multi-stage | Docker Docs