Learning Docker LinkedIn Quiz

Your co-worker is having issues getting Docker to work on their Mac. They tell you that whenever they try to use docker run, they get an error that looks like this: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running? They told you that they installed Docker Desktop recently. What would you first look for while troubleshooting this issue?

Check that the Docker whale is visible on their taskbar or system tray and that the boxes on top of it are NOT moving.

Which of these statements is least true about the difference between containers and virtual machines?

Containers are just smaller virtual machines.

Which of these options do the statements below describe? - I control how much of any resource a process can get. - CPU time, memory quota, and network access are some of the things you can limit through me. - I cannot limit how much disk space or disk IO a process can use.

Control Groups

Which of these statements is most true about the advantages Docker provides?

Docker Hub makes it really easy to distribute images to anyone, anywhere.

Which of these benefits for using Kubernetes is most accurate?

It makes managing hundreds of thousands of containers much simpler than using Docker alone.

Which of these statements is true about the docker client?

On the Mac, the Docker command-line client creates and runs containers in a small Linux-based virtual machine.

Which of these tools allows you to create non-root containers by default?

Podman

Which of these reasons best summarizes why you should not use the latest tag when building Docker images?

The application within the image can change when pulled again in the future.

When would you want to bind a port on your computer to that of a container?

When your container is running a network service that you want to use from your computer.

Which of these statements about docker container start is true?

You can run docker container start against a container multiple times.

What are some common problems with using Docker Machine to run Docker?

all of these answers

What is the main problem that Docker aims to solve?

apps working on one machine but not others

Select the least true statement from the list.

Anyone can push to Docker Hub. You do not need to register an account.

Which of these problems does Docker Compose not solve?

Autoscaling containers and transparently moving them from machine to machine.

Why would you want to mount a directory to your container?

Because containers do not save data after they are deleted.