how can unauthorized persons cause serious problems in a company’s database system?

Answer 1

You mean hackers?

http://www.google.com/search?sourceid=chrome&ie=UTF-8&q=what+kinds+of+damage+can+hackers+do

Read widely and take good notes. Let us know what YOU THINK.

Answer 2

thanks alot....that's the one I was trying to remember.

Answer 3

You're very welcome!