Which three statements are true about the management of Oracle Services?

Which three statements are true about the management of Oracle Services?

A.
To manage workloads or a group of applications, you can define services for a particular
application or a subset of an application’s operations.

B.
Similar work can be categorized under services to ease workload management.

C.
Users who share a service should have different service-level requirements.

D.
Oracle Enterprise Manager or SRVCTL should be used to control cluster-managed services,
not DBMS_SERVICE.

Explanation:
Using Oracle Services
To manage workloads or a group of applications, you can define services that you assign to a
particular application or to a subset of an application’s operations. You can also group work by
type under services. For example, online users can use one service, while batch processing can
use another and reporting can use yet another service to connect to the database. Oracle
recommends that all users who share a service have the same service level requirements. You
can define specific characteristics for services and each service can represent a separate unit of
work. There are many options that you can take advantage of when using services. Although you
do not have to implement these options, using them helps optimize application performance.
Oracle does not recommend using the DBMS_SERVICE package for use with services used by
an Oracle RAC database. Use SRVCTL or Oracle Enterprise Manager to create database
services for Oracle RAC.
Oracle Real Application Clusters Administration and Deployment Guide