Which statement is NOT correct when setting up compartment quotas?

Which workload type does the Autonomous Database on dedicated infrastructure service currently support?

An Autonomous Database (ADB) user with an instance wallet has left the company and they shared a database user id with other users when accessing ADB.
Other than changing the shared user password, what can the admin do to protect the instance?

Your customer wants to permanently disable scheduled maintenance on Autonomous Dedicated Infrastructure to keep their current database version(s).
How can they achieve this?