Check: why containers | ComputeSphere Learn

Goal: Confirm you can spot dependency drift and say what a container shares with its host.

Four questions: three on this module, one from Application foundations. Every answer explains itself, right or wrong.

A test passes on your Mac and fails in CI on Linux with 'Cannot find module ./Utils'. The file is utils.js. What happened?CI didn't check out the fileDrift in the operating system: Linux file names are case-sensitiveDifferent Node versions resolve paths differently

Which of these does a container NOT get its own copy of?A file systemNetwork portsThe kernel

A teammate says: 'We use containers, so we can drop the virtual machines and run customers side by side on bare hardware.' What's the concern?Containers share a kernel, so they isolate less than virtual machinesContainers can't run without a virtual machineContainers start too slowly

From Application foundations: you build a container image with the production database URL copied into it. What goes wrong?Nothing, as long as it only runs in productionStaging can't run the tested image, and the URL is readable by anyone who pulls itThe build fails because images can't hold URLs

Retry as often as you like.