Oracle Exam 1Z0-931-21 Topic 11 Question 11 Discussion

Clone Sources

You can use a running database to create a clone. For databases running onshared Exadata infrastructure, you can also use a backup as the source of your clone. When using a backup, you can select a listed backup to clone from, or create a point-in-time clone. Point-in-time clones contain all data up to a specified timestamp. The specified timestamp must be in the past.

Note When you create a clone from a backup, you must select a backup that is at least two hours old.

https://docs.oracle.com/en-us/iaas/Content/Database/Tasks/adbcloning.htm