The short answer - yes you can.
The long answer - My first bit of advice for anyone taking a cert test in ANYTHING, get your mindset right first. Are you taking the test because you just care about the piece of paper that has some letters and a company logo stamped on it OR do you honestly want to know and learn the material that the cert stands for?
If you just care about the piece of paper, thinking that "all I want is to get by and collect as many certs so I can pass myself off as an IT pro just enough to fool someone to get hired"...then...well good luck in your con..oops I mean job interview, make sure you keep your resume handy though because your new IT job won't last long. ;)
As for those that REALLY value the knowledge first, the cert second -- you have to do simply what you feel is BEST FOR YOU! Ignore folks who say never go to school, ignore folks who say JUST go to school. Remember, the most sound advice anyone can give anyone (and what I tell myself over and over again) no one is responsible for YOU..besides......(tada) *YOU*. If you fail at your job from bad training, the folks who tell you how you need to train won't be feeling the failure YOU will. They won't be missing their mortgage payments YOU will, etc. Get my drift?
You know your capacity to learn, you know your desire for the job, you know your attention span, you know your finances...YOU decide! What works for you. Be a leader not a follower. ;)
Good luck man!