Which two are true about database roles in an Oracle Data Guard Configuration? 

Answer options:

A. A configuration consisting only of a primary and one or more physical standby databases can support a rolling release upgrade.
B. A Logical Standby Database can be converted to a Snapshot Standby Database.
C. A Logical Standby Database can cascade redo to a terminal destination.
D. A Snapshot Standby Database can be a fast-start failover target.
E. A Physical Standby Database can be converted into a Logical Standby Database.

BE

B: A snapshot standby database can be converted back into a physical standby database at any time. E: You create a logical standby database by first creating a physical standby database and then transitioning it to a logical standby database. Incorrect Answers: A: Oracle Database supports the installation of database software upgrades, and the application of patch sets, in a rolling fashionwith near zero database downtimeby using Data Guard SQL Apply and logical standby databases. C: A cascaded redo transport destination (also known as a terminal destination) receives primary database redo indirectly from a standby database rather than directly from a primary database. Only physical standby databases can cascade redo. D: A snapshot standby cannot be the target of a switchover or fast-start failover operation. References: https://docs.oracle.com/cd/E11882_01/server.112/e41134/create_ls.htm#SBYDB4732 https://docs.oracle.com/cd/E11882_01/server.112/e41134/manage_ps.htm#SBYDB00580