I would recommend you download the 10-K, earning release, 10Q from sec.gov.
You need understand the relevant accounting pronouncements.
SEC reporting is very similiar to audit work, which means you may need work
long hours to meet the reporting deadline.
Some people ask technical questions, like FAS 157, 158, FAS 52, FAS 133 etc.
.. to test you have basic/comprehensive knowledge of SFAS.
Good luck!