I found
Omega to be very helpful with 200 free questions and for the small price of $6.95 for an additional 500 questions, it was very affordable. (Click on the exams at the top, left of the page) They also have Net+ questions as well.
I also found that by printing out just the answers, I could find where my weaknesses were as I went along.
Here is where I first found Omega and other sites that helped.