When asked, will the questions be about the installation, preparation, and management section only, or are there other questions about other sections?
Use this index page: https://www.vmware.com/learning/certification.html
Go to the page for the specific VCP, open the page for the exam for that VCP, and you’ll find an Exam Guide document which will tell you the topics covered in that exam.
As an example, this is the page for the most common exam on vSphere for the VCP-DCV: https://www.vmware.com/learning/certification/vcp-dcv-8-exam.html