Hello Deepthi,
Great question. There is a wonderful and very supportive Facebook group that offers sample test questions, case studies and support with preparing for the CEP exam. The group has a long list of documents under "Topics" to help outline content and preparation for the exam.
https://www.facebook.com/groups/383611768954219
ACSM Certified Clinical Exercise Physiologist Study Group
The group is completely free and filled with assistance and clarification about general exam questions along with specific content related questions. Numerous clinicians have provided very positive comments about how supportive the FB page is - and it is free! I hope this helps you - good luck with your studying.