Its great that you ask that! I actually got my PC Tech certification through this application. Its basically something you can sign up for to take certification classes. They have CompTIA A+ Essentials, Security +, Linux + etc. It is really great if you want to learn about computers and technology and they guarantee that you will pass the certification exam if you complete the course in its entirety.
Yes, they can. Do remember that if the options there to increase your education, or perform better, then there is no harm in it what so ever.
The Company TestOut is an Information Technology Certification Company that offers TestOut Pro Certifications and LabSim courseware solutions. They have conferences and lectures.
Yeah there is just start the test. Answer every question. Than review the answers and press F5. F5 will refresh the screen and the test won't be scored. All you have to do is memorize the answers.