Hi
Well there aren't specific mock questions out there as far as I know but I've personalyl started a mock design and will be going through all the portions that make up a design in preparation for my VCAP-DCD retry and to try become a better architect and am looking for as many people as possible to particicpate and comment
The scenario of the fictitious company is detailed here: http://thesaffageek.co.uk/2013/02/12/vcap5-dcd-design-practice/
The first portion of the design, the storage design is here: http://thesaffageek.co.uk/2013/02/12/safe-and-legit-storage-design/
Hope it helps
Gregg