Does anyone know of resources for the Oracle 1Z0-072 exam objectives?
Relational Database Models


It is a basic DBA exam. I think they meant Relational Data Structures, which you would need anyway. Maybe this specific part: Introduction to Oracle Database. Nothing complicated, I have never ever encountered a modeling question on the exams from the DBA track.


Connecting to Oracle Databases


My bet is on Configuration and Administration of Oracle Net Services. Connection Manager is the odd one here, it is nice to know what it is, but I don't think the details are needed, it is a very rarely used feature.

Both of the above chapters cover other exam topics as well.