多項(xiàng)選擇題

Which two statements about Recovery Manager （RMAN） backups are true？（）

A.Online redo log files can be backed up.
B.Archived redo log files are backed up.
C.Only used data blocks can be backed up as backup sets.
D.Only consistent database backups can be performed.
E.RMAN backup can be taken only if the database is configured in ARCHIVELOG mode.

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單項(xiàng)選擇題

The database users are connecting to the PROD database from different applications， thereby degrading the database performance. The senior database administrator suspects the large number of concurrent connections to be the reason for low performance and asks you to restrict the number concurrent connections per database user to one. Which action would you take to achieve this objective？（）

A.set the SESSIONS to 1 in the parameter file
B.grant SINGLE SESSION privilege to all of the users
C.set the SESSIONS_PER_USER to 1 in the users’ profile
D.grant RESTRICTED SESSION privilege to all of the database users
E.create a role with SINGLE SESSION privilege and assign the role to the users

多項(xiàng)選擇題

Which two statements are true regarding a PL/SQL package body？（）

A.It cannot be created without a package specification.
B.It cannot invoke subprograms defined in other packages.
C.It can contain only the subprograms defined in the package specification.
D.It can be changed and recompiled without making the package specification invalid.

Which two statements about Recovery Manager （RMAN） backups are true？ （）

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Which two statements are true regarding a PL/SQL package body？（）

Which two statements about Recovery Manager （RMAN） backups are true？（）