DBA Technical Interview

I have a small dilemma, i have applied for an internal DBA role (more money more prospects) my current role is application specific, however affords me a lot of use of the database that supports the app, and the organisation of it.

I applied for the DBA role, and have had a preliminary interview to see if i am the right ‘type’ of person, which i passed with flying colours.

I am now faced with a technical interview around Oracle DBA work, and i have no idea where to start with regards to what i know… any ideas??