Which two tasks can be performed by using Oracle SQL statements?
A.
changing the password for an existing database user
B.
connecting to a database instance
C.
querying data from tables across databases
D.
starting up a database instance
E.
executing operating system (OS) commands in a session
Explanation:
http://www.techonthenet.com/oracle/password.php
https://docs.oracle.com/cd/B28359_01/server.111/b28324/tdpii_distdbs.htm