hi hi..one of the question ask by interviewer :D . as i understand is about the recycle bin and quota reach limit contact!! After that i found the answer here :
About twice a week someone calls or writes into support trying to figure out why their Site Owners cannot reset passwords, manage the recycle bin, or "see everything" in site settings. The answer is pretty easy – you have to be a Site Collection Administrator to be able to perform those actions. The next question we get from Site Owners is "how do I become a Site Collection Administrator?" The answer is easy enough, find out who your current Site Collection Administrator is and ask that individual to promote you to that role. Here's a short tutorial on how to create new Site Collection Administrator.
Take a look at the graphic below (click for full version). It displays the different views if you will see if you log into the Site Settings portion of your WSS 3.0 site as a member of the site owner's group and then as a Site Collection Administrator. Hint – the Site Collection Administrator's view is the top image. You can easily replicate this for yourself if you want to test it out – just create a test user that is a member of the Site Owners (or similar) SharePoint security group and go to the site settings page.
Extra this are at site setting :D [all the time our permission is Farm admin , then will never notice about this!! ha ha] Now you know? :D