Which three statements are true regarding the use of the Database Migration Assistant for Unicode (DMU)?
(Choose three.)

You create a table with the PERIOD FOR clause to enable the use of the Temporal Validity feature of Oracle Database 12c.
Examine the table definition:

Which three statements are true concerning the use of the Valid Time Temporal feature for the EMPLOYEES table? (Choose three.)

You want to create a database and you have the following:
- Oracle Grid Infrastructure is installed and configured.
- Oracle Database Vault is installed in ORACLE_HOME to be used for this database.
- Oracle Enterprise Manager Cloud Control is available and an agent is deployed on the database server.
Examine the requirements:
1. configuring the database instance to support shared server mode
2. using Automatic Storage Management (ASM) for storing database files.
3. configuring a naming method to help a remote user connect to a database instance
4. configuring the Fast Recovery Area
5. configuring Database Vault
6. configuring Enterprise Manager (EM) Database Express
7. registering with EM Cloud Control
8. configuring remote log archive destinations
9. enabling daily incremental backups
10. configuring a nondefault block size for nondefault block size tablespaces Which of these requirements can be met while creating a database by using the Database Configuration Assistant (DBCA)?

Which three statements are true concerning unplugging a pluggable database (PDB)? (Choose three.)

You want to prevent a group of users in your database from performing long-running transactions that consume huge amounts of space in the undo tablespace. If the quota for these users is exceeded during execution of a data manipulation language (DML) statement, the operation should abort and return an error. However, queries should still be allowed, even if users have exceeded the undo space limitation.
How would you achieve this?