Non-interactive installation?

I’m looking at non-interactive installation/upgrade/maintenance for my system. Is it possible to run the install script non-interactively by providing pre-seed values? I know re-installing picks up existing settings, so it should be possible to provide those for a fresh installation, but the install script will still prompt to confirm a handful of settings. Is it possible to skip those questions?

Thanks for your help.

I just started looking through bootstrap.sh, saw questions.sh and the first line contains a check for a NONINTERACTIVE var. I have some research to do…