OCP-1Z0-053-200题-155题-218

QUESTION 155

Your database is running in ARCHIVELOG mode. You are performing a user-managed backup of the DATA1

tablespace. You place the DATA1 tablespace in backup mode by issuing the following statement:

ALTER TABLESPACE data1 BEGIN BACKUP;

While you are performing the backup, an error occurs that causes the instance to terminate abnormally.Which

statement about the DATA1 tablespace is true?

A. The DATA1 tablespace is automatically taken out of backup mode when the instance aborts.

B. If you restart the database, the DATA1 tablespace will be automatically taken out of backup mode when the

database is opened.

C. If you restart the database, the DATA1 tablespace will be automatically taken out of backup mode when the

database is mounted.

D. If you restart the database, the database will not be opened.

Answer: D

同218题：http://blog.csdn.net/rlhua/article/details/13808143

Explanation/Reference:

Section: Backup, Recovery & Recovery Manager (RMAN)

If you restart the database, the database will not be opened. The database will reach the MOUNT state,but will

not be opened. An error will be generated indicatingthat media recovery is required. To successfully open the

database, you should take the tablespace out of backup mode. You can do so by issuing the ALTER

TABLESPACE data1 END BACKUP;statement, or you can issue an ALTER DATABASE END BACKUP;

statement, which will take all datafiles in all tablespaces out of back up mode.

All of the other options are incorrect. The DATA1 tablespace is automatically taken out of backup mode when

the instance aborts, when the instance is opened, or when the instance is mounted.