The highest score you can get on the ASVAB is a 99
I just did a quick search online and found a plce where you can do the ASVAB prep. Military.com has it : http://www.military.com/ASVAB
After you are able to pass your practice ASVAB, you would schedule an appointment at your nearest MEPS to take the actual ASVAB.
No, some questions are easy, some aren't. You most likely won't know everything. It's meant to make you think.
you can get the information about asvab test study guide from the following website http://www.apexprep.com/asvab/
No. The ASVAB is used to determine what occupations you can be placed in.
High school students can take the student ASVAB at their schools. The score is not used by the military. The ASVAB for enlistment is given at the MEPS, or you can arrange a CAT ASVAB through a recruiter.
Industries don't take the ASVAB people do, so I suspect you meant merchant mariner, but since merchant mariners are civilians they do not take the ASVAB
You can find free ASVAB review materials here: http://www.testprepreview.com/asvab_practice.htm
No
You have to take the ASVAB to enlist in any of the armed forces.
You can only score a 99% on the asvab.. To get a 124 would be impossible.