Which two tasks can be performed by using Oracle SQL statements? (Choose two.) 

Answer options:

A. changing the password for an existing database user
B. connecting to a database instance
C. querying data from tables in different databases
D. starting up a database instance
E. executing operating system (OS) commands in a session

AC

References: http://www.techonthenet.com/oracle/password.php https://docs.oracle.com/cd/B28359_01/server.111/b28324/tdpii_distdbs.htm