I think some of the answers seem out of place, or to all be the correct one, Due to the OP citing them from memory (Thereby not having the actual answers, but just a paraphrase of them)
I liked this part :-) :
6) To bring a background process to the foreground, fg command
is used with the process ID of the process.
The answer here could be both true and false.
No it couldn't ... The question doesn't ask what other options you have to do the action with ... it is asking if that specific command will make that happen. To which the answer is true... regardless of what happens around fg or what you enter before or after, it's function is used with process ID to bring a background to the foreground. I do not see any falsity in there.
If I were you I'd check up on those link's that Onebuck posted (I know I'm going to) even if they aren't what you need to answer the questions to this exam, You'll get some good reading out of it.
didn't see that there were 2 pages, ignore that last part