Exam 350-901 topic 1 question 344 discussion

From AI: In Docker, docker exec requires the container’s name (set via --name during docker run) or its ID. The original command (docker run -d devcorapp) doesn’t specify a name, so Docker assigns a random name (not devcorapp). Using devcorapp here would likely fail unless the container was explicitly named devcorapp (not shown). Fit: Incorrect; devcorapp is the image name, not the container identifier.

to run docker exec we need container id or name, not image name as option A

However, devcorapp is the image name, not the container ID or name. Since it doesn't target the running container correctly, this command would fail.

To start an interactive Bash shell in the running container, the correct command is: B. docker exec -it devcorapp /bin/bash This command uses docker exec to execute a new command in a running container. The -it flags attach an interactive tty in the container, and devcorapp is the name of the container where the Bash shell is to be started. /bin/bash is the command to start the Bash shell.

docker run -d <image_name>...if you want to set the container name you have to use --name

Excuse me... Please look exact question The “devcorapp” container so B is correct

It looks as answer's mistyped... Both B and C can be correct. To start an interactive Bash shell in a Docker container, you can use the docker exec command that allows developers to execute commands in running containers. $ docker exec -it <container> bash Where container is either the name or the identifier of a Docker container that can be obtained using the docker ps command. B can be correct, but devcorapp not the same as devcorapp2 So C can be correct and again - The short container ID represents the first 12 characters of the full container ID. At answer only 11 characters without starting 2

I thinks its C on run command it is created container DEVCORAPP2 where is not DEVCORAPP originally in B also I research you can call Docker exec command with containerID witch is stated in run command I dont have hens on experience with containers can some one verify this?

The answer is B. docker exec -it devcorapp /bin/bash. The docker run command is used to create and start a container. The -d option tells Docker to run the container in detached mode. This means that the container will run in the background and you will not be able to interact with it directly. The docker exec command is used to execute a command inside a running container. The -it option tells Docker to allocate a pseudo-TTY connected to the container's standard input (i.e. stdin). The /bin/bash command is used to start an interactive Bash shell in the container. Therefore, the command to start an interactive Bash shell in the running container is docker exec -it devcorapp /bin/bash

Looking at the documentation (https://docs.docker.com/engine/reference/commandline/exec/) it should be B.

container is already running so answer is B

Answer C, you can access shell in the container that is already running

docker run is for running a new container. Here the container has already been run. docker exec -i (interactive mode) -t devcorapp /bin/bash