I noticed a bullet point on both the Sales Cloud and Service Cloud Consultant exam guides which were the same. This is found in the Integration and Data Management knowledge area of both exam guides, and it reads:
- Given a scenario, analyze the implications and design considerations of large data and transaction volumes.
Here are my thoughts on what this particular bullet point may be hinting at. You just might find a question on your certification exam related to this, so I wanted to make you aware of an option that is not available via the interface, but by contacting Salesforce support.