+1 to O'Reilly.
Sanders also has practice exams on DO180 content.
I'll echo what folks said above about _closely_ and _slowly_ re-reading the exam questions.
For example: if the exam asks that a containerized web service should be made available on the host via standard port running as a service account and says "Hello World" on the default landing page (<-- I made that up), then what does that mean?
Well, speed reading c/would (incorrectly) get you simply running an httpd image from registry, which more than likely is a fail. My example ask (because I wrote it just now) actually means several things:
1. the test to validate is probably going to be: [host$] curl localhost:80 <-- because the question is "standard" port for web and default langing page
2. "service account" implies rootless, so running the container as root / sudo is going to be a fail even if a webpage is up
3. if the container image supplied runs / exposes httpd on port 8080 (and many images do), you're going to need to map the correct host_port:container_port
4. if the host has a firewall that doesn't allow port 80 open, you're going to need to know how to modify firewalld to allow it.
5. if the container image has a default landing page (aka. index.html, and many do), you're going to need to overwrite it, which means mounting a persistent volume from host to container
6. if SELinux is enforcing (and all RHEL exams have it on AFAIK), you're going to need to know how to mount container volumes with SE (step #5) and open firewalled ports (step #4) in an SELinux compliant way
7. for all steps above, your changes must survive a reboot. (This seems to be a reoccuring theme in Red Hat exams.) So the web container runtime must be started as a systemd service that's enabled on the default boot target.
Again, the above is my example. I've actually not taken EX180 -- yet! but am obviously prepping for it by listening to feedback / lessons learned from other folks.
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Sr. Solution Architect
