Multiple deployments in the same directory. If you want to test the ingress, you'll need to edit spec.rules.host to include your namespace as part of the hostname.
Demos are named day1/demo1_1.yaml, day2/demo1_2.yaml and so on. Ask for help in the Slack channel if you get stuck or encounter typos or other errors.
Exercises are defined in day1/exercise.md, day2/exercise.md and so on. Same guidelines apply for asking help, please ask in the channel since someone else may have encountered the same issue.