Which two statements are true about Quality of Service Management? 

Answer options:

A. It can enable a more efficient sharing of hardware resources.
B. It can improve the performance of SQL statements.
C. It can improve system stability as the workload changes.
D. It can improve the performance of PL/SQL.
E. It can reduce the load on the system caused by Oracle background processes.

AC

Oracle Database QoS Management provides the following benefits: ✑ Enables more effective sharing of hardware resources ✑ Provides stability to the system as the workloads change Note: More benefits are: ✑ Reduces the time and expertise requirements for system administrators who manage Oracle Real Application Clusters (Oracle RAC) resources ✑ Helps reduce the number of performance outages ✑ Reduces the time needed to resolve problems that limit or decrease the performance of your applications ✑ Makes the addition or removal of servers transparent to applications ✑ Reduces the impact on the system caused by server failures Helps ensure that service-level agreements (SLAs) are met 

Reference: https://docs.oracle.com/cd/E11882_01/server.112/e24611/apqos_intro.htm#APQOS268