dear friends,
I am a newbie and have a job interview next week for a Oracle DBA postion. There are two questions that the recuriter asked me and I am unsure of the answer. Could someone shed light and clarify them.

1.) Familiarity with METALINK:
What is it and how is it used?

2.) Write Scripts to resolve alerts in OEM:
What are they talking about? What kinds of alerts are they
reffering to?

3.) Change management system:
What is this and how is it used.

Any help will be greatly appreciated.