Relationshop between Plesk Updates utility and yum

[LuisN]

Can someone please help me out with the following questions:

1) From what I understand the Plesk Updates UI (or its corresponding autoinstaller command) only handles updating Plesk Panel components. Meanwhile, yum is used to update core OS components. Is this correct?

2) If I want to keep my server up-to-date, I should be running *both* the Plesk Updater and yum fairly often, right?

3) If the answer to #2 is yes, are there any conflicts between these two? Is there a recommended order (ie, do "yum" first, then the Plesk updater?)

Thanks in advance....