Check: running containers | ComputeSphere Learn

Goal: Confirm you can map a port, pass a setting, pick the right debugging tool, and say what a container shares with its host.

Four questions: three on this module, one from Module 1. Every answer explains itself, right or wrong.

You run docker run -d -p 8080:3000 my-app. The app inside listens on 8080. What does curl localhost:8080 get?The app's responseNo answer: the connection is reset or refusedDocker finds port 8080 inside and connects to it

The same image must run with DEBUG=true on your laptop and DEBUG=false on a test server. What do you change?Build two images, one per settingPass -e DEBUG=true or -e DEBUG=false to docker runMap a different port with -p

A container keeps exiting a second after it starts, and it's set to --restart unless-stopped. What tells you why?docker logs on the containerdocker exec -it into it with a shellChanging the restart policy to always

From Module 1: you start three containers on one laptop. What do they share?Nothing: each boots its own operating systemThe host's operating system kernelOne shared set of files and libraries

Retry as often as you like.