SAP security general questions

These interview questions are collected from my friends and some of faced by me. I know some of you already aware of these questions though will help for beginners  as well as experinced.I am sure these will help.

Questions about out of subject (general):

+which kind of projects you worked?

+what is server id?

+what is EHP?(enhancement package)?

+What is ECC & ERP?

+What is the difference between ERP & R3?

+How many roles and user your organization have?

+what are your system names?  

+what is your SLA and priorities?

+ How do you rate yourself in R3,GRC & BI out of 10?

+what is your landscape or platform?

+where is your company located?  

+How you get into sap?

+How you started your career?

+Have you involve in any up gradation or roll outs?