Which three statements are true about Quality of Service Management (QoS)? 

Answer options:

A. A server-pool can be managed by QoS even if it does have database instances running on any server in the pool.
B. It can manage database services only if they are defined as UNIFORM services.
C. It requires Oracle Grid Infrastructure for a Cluster to be installed and Clusterware to be running.
D. It supports multiple databases assigned to the same server pool.
E. Databases managed by QoS can be administrator managed or policy managed.

BCD

B: Database services should be created as UNIFORM services, meaning the service is offered by every available instance running in the specified server pool. If your application requires a SINGLETON service, then, to use Oracle Database QoS Management in management mode, the service must run in a server pool that has a maximum size of one. If you use a SINGLETON service in a server pool that has a maximum size greater than one, then Oracle Database QoS Management reports a configuration violation. C: Initial QoS configuration includes: ✑ Installing and Configuring Oracle Grid Infrastructure for a Cluster ✑ Creating and Configuring Server Pools ✑ Creating and Configuring an Oracle RAC Database ✑ Enabling Oracle Database QoS Management Incorrect Answers: E: It must be policy managed. When you use DBCA to create an Oracle RAC database, you select policy-managed for the database, and choose the server pools which the database instances should run in. References: https://docs.oracle.com/cd/E11882_01/server.112/e24611/install_config.htm#APQOS157 https://docs.oracle.com/database/121/APQOS/wlm_strats.htm#APQOS341