Which four statements are true about this administrator…

An administrator account is granted the CREATE SESSION and SET CONTAINER system privileges.
A multitenant container database (CDB) instant has the following parameter set:
THREADED_EXECUTION = FALSE
Which four statements are true about this administrator establishing connections to root in a CDB that has been
opened in read only mode?

A.
You can conned as a common user by using the connect statement.

B.
You can connect as a local user by using the connect statement.

C.
You can connect by using easy connect.

D.
You can connect by using OS authentication.

E.
You can connect by using a Net Service name.

F.
You can connect as a local user by using the SET CONTAINER statement.

Explanation:
* The choice of threading model is dictated by the THREADED_EXECUTION initialization parameter.
THREADED_EXECUTION=FALSE : The default value causes Oracle to run using the multiprocess model.
THREADED_EXECUTION=TRUE : Oracle runs with the multithreaded model.
* OS Authentication is not supported with the multithreaded model.
* THREADED_EXECUTION
When this initialization parameter is set to TRUE, which enables the multithreaded Oracle model, operating
system authentication is not supported. Attempts to connect to the database using operating system
authentication (for example, CONNECT / AS SYSDBA or CONNECT / ) when this initialization parameter is set
to TRUE receive an ORA-01031″insufficient privileges” error.
F: The new SET CONTAINER statement within a call back function:
The advantage of SET CONTAINER is that the pool does not have to create a new connection to a PDB, if
there is an exisitng connection to a different PDB. The pool can use the existing connection, and through SET
CONTAINER, can connect to the desired PDB. This can be done using:
ALTER SESSION SET CONTAINER=<PDB Name>
This avoids the need to create a new connection from scratch.