This is a list of resources I used to pass the VCAP5-DCA (VDCA550) exam.

The first place to star is the exam blueprint.  This really is the go-to resource for everything you can expect to be tested on.

Exam blueprint (v3.3)
http://mylearn.vmware.com/lcms/web/portals/certification/VCAP_Blueprints/VCAP5-DCA-VDCA550-Exam-Blueprint-v3_3.pdf

VMware VCAP5-DCA Official Certification Guide
http://www.amazon.co.uk/books/dp/0789753235

Chris Wahl’s VCAP5-DCA Study Sheet
https://drive.google.com/file/d/0B8JynlqprJW2c1BXSURNUDFsZXM/view?pli=1

Nick Marshall’s vBrownBag VCAP5-DCA Series
https://www.youtube.com/watch?v=c0TJ1rQudTo&list=PLgKUP8MebCghDhhtd1hl3h2cqYqL_G2Rw

VMworld 2014 Breakout Sessions
http://www.vmworld.com/community/sessions/2014/
I especially found the following helpful:
STO2197 – Storage DRS- Deep Dive and Best Practices
NET2745 – vSphere Distributed Switch – Technical Deep Dive
INF2427 – DRS – Advanced Concepts, Best Practices and Future Directions
BCO2701.1 – vSphere HA Best Practices and FT Technology Preview
INF2311.1 – vCenter Server Architecture and Deployment Deep Dive

VMware’s Hands-on-Labs
http://labs.hol.vmware.com/

VMware vSphere 5.1 Clustering Deepdive (Epping/Dennerman)
http://www.amazon.co.uk/VMware-vSphere-5-1-Clustering-Deepdive-ebook/dp/B0092PX72C

Josh Andrews VCAP5-DCA Practice Environment
http://sostechblog.com/2015/03/05/vcap5-dca-practice-environment-test-track-v-550-lab-on-a-laptop-ii/

Together with the above I used a number of the VMware PDFs, namely:

vsphere-esxi-vcenter-server-55-command-line-interface-concepts-examples-guide.pdf
vsphere-esxi-vcenter-server-551-storage-guide.pdf
vsphere-esxi-vcenter-server-55-availability-guide.pdf
vsp_powercli_55_usg.pdf

Oh, and maybe a few of these too… 🙂