Is it possible to accidentally use some paid feature in Oracle XE database while in an Enterprise environment? IT in my org are wary about approving me installing Oracle Express Edition.
https://www.oracle.com/database/technologies/xe-downloads.html

Their reasoning is that apparently some DBA once said that devs can trigger some enterprise features accidentally while using it, and rack up hundred thousands of dollars in usage fees. I'm skeptical because I can't find any information online that would suggest that. Though I know Oracle doesn't have a great reputation.

From looking at XE description, it seems to be designed so that devs can install it on their environments to get a prototype working etc. Without having to worry about fees and licenses.
Is it true, can using Oracle XE on my dev box in a large company somehow rack up fees without knowing about it?
Oracle Express Edition is free software that can be used even for commercial purpose.

What the DBA said is true for Enterprise Edition where some features can not be completely disabled (e.g. Advanced Compression), and it was true for Standard Edition in versions below 11g (e.g. Diagnostic Pack).

Express Edition will be fine.

For a personal learning/development environment, you could even use Enterprise Edition, if you will be the only one using it.