单项选择题 Which steps are mandatory to enable Direct NFS？（）   1. Mount all required file systems using the kernel NFS driver.  2. Create an oranfstab file containing the attributes for each NFS server to be accessed using Direct NFS.    3. Replace the ODM library libodm11.so_stub with libodm11.so.

单项选择题 You perform a backup using the following BACKUP command: RMAN> BACKUP AS COMPRESSED BACKUPSET DATABASE; Which statement is true of this command?（）

单项选择题 Evaluate the following block of code：   BEGIN DBMS_NETWORK_ACL_ADMIN.CREATE_ACL （ acl =>  ’mycompany-com-permissions.xml’， principal => ’ACCT_MGR’， is_grant => TRUE， privilege => ’connect’）；  DBMS_NETWORK_ACL_ADMIN.ASSIGN_ACL （ acl => ’mycompany-com-permissions.xml’， host => ’*.mycompany.com’）； END；   What is the outcome of the above code？（）