Here is a good simulator - http://virtualtiers.net/
Also check out the study resources on my blog - http://blog.marccrawford.com/vcap-dcd-study-resources/
You should also consider changing and taking the DCD 5.5 version. The questions are lesson verbose and easier to understand what they are asking.
Good luck.
Please mark helpful & correct answers.
Thanks
Marc
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Thanks,
Marc Crawford
CCNA, MCSE, MCTS, A+, Net+, Sec +, VCA-WM, VCA-DCV, VCA-Cloud, VCA-NV, VCP-NV, VCP-DCV, VCP, VCAP5-DCA
http://gplus.to/marccrawford
http://blog.marccrawford.com
@uber_tech_geek