Re: Oracle DBA
If the choice is between the courses mentioned on the website you linked to, I would say she should do the OCA (DBA track) first, if she doesn't have any Oracle experience yet. That means:
Option 1:
1Z0-042 - Oracle: Database 10g Administration I
Option 2:
1Z0-001 - Introduction to Oracle SQL and PL/SQL AND
1Z0-031 - Oracle 9i Database: Fundamentals (I have thought these ones myself a few years ago.)
If she has some Oracle experience she could go for the OCP (DBA track) directly otherwise complete the OCA (DBA track) first. And that would include the following courses:
Option 1:
1Z0-043 - Oracle: Database 10g Administration II
Option 2:
1Z0-032 - Oracle: Database 9i Database: Fundamentals II AND
1Z0-033 - Oracle 9i Database: Performance and Tuning
Personally I would recommend Option 1 because most companies have upgraded to 10g already.