Which two options can be configured for an existing database by using the Database Configuration Assistant (DBCA)?

Oracle Label Security requires configuration through its own administrative API (SA_SYSDBA package) or Enterprise Manager, and is not available as a DBCA option for managing an existing database.

DBCA provides a dedicated option to configure Oracle Database Vault on an existing database when the Database Vault binaries are present in ORACLE_HOME, allowing DBAs to enable its realm and rule-based access controls post-creation. This avoids the need for manual SQL-based configuration of the Database Vault owner and account manager accounts.

Applying an Oracle Suggested Backup Strategy is performed through RMAN scripting or EM Cloud Control backup wizards, not through DBCA's existing database configuration options.

DBCA allows enabling and configuring Database Resident Connection Pooling (DRCP) for an existing database, which establishes a server-side shared connection pool. DRCP reduces the overhead of creating dedicated server processes for each client connection, and DBCA handles setting the pool parameters through its interface.

Creating tablespaces with non-default block sizes is a SQL DDL operation requiring the CREATE TABLESPACE ... BLOCKSIZE clause, and DBCA does not expose this as a configuration option for existing databases.