Docker Updated DCA Exam Questions and Answers by josephine

 = (Please check the official Docker site for the comprehensive explanation) References: (Some possible references from the web search results are)

[Docker Swarm Tutorial: Manage Multiple Docker Hosts - Edureka]

[Docker Swarm - Docker Documentation]

[Docker Swarm Tutorial: How to Manage Multiple Docker Hosts - Linux Hint]

[Docker Swarm Tutorial: How to Manage Multiple Docker Hosts - YouTube]

[Docker Swarm Tutorial: How to Manage Multiple Docker Hosts - Medium]

I hope this helps you in your exam preparation. Good luck!????

= 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

Process ID is a type of Linux kernel namespace that provides container isolation. Linux namespaces are a feature of the Linux kernel that isolate and virtualize system resources of a collection of processes1. Process ID namespace isolates the process ID number space, meaning that processes in different PID namespaces can have the same PID2. This allows each container to have its own init process with PID 1, which is the ancestor of all other processes in the container3. Process ID namespace also affects other identifiers, such as thread IDs, parent process IDs, and session IDs4. References: Namespaces in operation), pid_namespaces), What is a PID namespace?, Linux Namespaces: PID)