I am currently VCP6-DCV certified and want to get certified in a different track (i.e. Desktop & Mobility), do I need to complete another 5 day training class just to take the exam or can I just self study and use OTJ experience?
Thanks!
No, if you hold a valid VCP, you can do another VCP exam for different tracks without the official classroom requirements.
The pages for each individual certification have "new candidate" and "existing candidate" tabs - you can use these to work out the correct path/requirements for you.
Path 2 under "existing candidate" will give you your answer on this page: VCP6-DTM Certification
And this is the best start page to find all the certifications: VMware Certification