Correct Answer: B,C
NDB can leverage snapshots and transaction logs to refresh a database clone to the latest state of the source database. Snapshots are point-in-time copies of the database that are stored on the Nutanix cluster. Transaction logs are records of the changes made to the database after the snapshot was taken. NDB can use either snapshots or transaction logs, or a combination of both, to refresh a database clone. Cerebro logs and templates are not used for refreshing database clones. Cerebro logs are used for log catch-up operations, which are different from refresh operations. Templates are used for provisioning new databases, not for refreshing existing ones. References:
* Nutanix Database Management & Automation (NDMA) course, Module 4, Lesson 4.3 - Refreshing Clones
* Nutanix Support & Insights, Nutanix NDB User Guide v2.5, Clone Database Management