Joomla! Certification Program™A Joomla! administrator you need the understand how the CMS Joomla works and know the relationship between files and the database. Learn more about the elements that make up a Joomla! website.
- Understanding of a CMS
- Relationship of database to file structure
- Understanding that the website is made up of files and a database.
https://docs.joomla.org/Portal:Learn_More