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Practicetest 1Z0-053 Oracle cert24

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1Z0-053 Oracle Database 11g: Administration II our products come with a 100% guarantee of success. We hold this claim because of the highly dedicated and expert team that we have and because of our past performance.

Practicetest 1Z0-053 Oracle cert24

QUESTION 1
Examine the following command used to perform incremental level 0 backup:

RMAN> BACKUP INCREMENTAL LEVEL 0 DATABASE;

To enable the block change tracking, after the incremental level 0 backup you issued the following command:

SQL> ALTER DATABASE ENABLE BLOCK CHANGE TRACKING USING FILE ‘/mydir/
rman_change_track.f’;

To perform incremental level 1 cumulative backup, you issued the following command:

RMAN> BACKUP INCREMENTAL LEVEL 1 CUMULATIVE DATABASE;

Which two statements are true in the above situation? (Choose two.)

A. The block change tracking data will be used only from the next incremental 0 backup.
B. The incremental backup will use change tracking data for accomplishing the backup.
C. The incremental backup will not use change tracking data for accomplishing the backup.
D. The block track file will scan all the blocks and create bitmap for all the blocks backed up in the level 0
backup.

Answer: AC
Section: Backup, Recovery & Recovery Manager (RMAN)

Explanation/Reference:
Section: Backup, Recovery & Recovery Manager (RMAN)

http://www.pythian.com/documents/Pythian-oracle-block-change.pdf After enabling change tracking, the first level 0 incremental backup still has to scan the entire datafile, as the change tracking file does not yet reflect the status of the blocks. Subsequent incremental backup that use this level 0 as parent will take advantage of the change tracking file. When some a chunk needs to be marked dirty for the first time after incremental backup, version information in bitmap extent headers (X$KRCFBH) is initialized – XFLAGS is set to 2, CURR_VERCNT and CURR_VERTIME
filled from datafile descriptor. If file had no changes since last incremental backup – nothing is written to the bitmap. There is no difference in handling different backup levels. Version is created in the same way whether its level 0, level 1 or level 4 backup. By the way, it seems that Oracle 10g documentation officially mentions only support for levels 0 and 1. However, I checked incremental backup levels up to 4 and they do work (10.2.0.2). Oracle Press 1Z1-053 Exam Guide, Chapter 4: Creating RMAN Backups The first incremental level 0 backup reads every block in the datafile, and subsequent incremental level 1 backups use the block change tracking file. No reference to create bitmap found. http://download.oracle.com/docs/cd/B19306_01/backup.102/b14192/bkup004.htm#i1032148

RMAN’s change tracking feature for incremental backups improves incremental backup performance by recording changed blocks in each datafile in a change tracking file. If change tracking is enabled, RMAN uses the change tracking file to identify changed blocks for incremental backup, thus avoiding the need to scan every block in the datafile. Using change tracking in no way changes the commands used to pe form incremental backups, and the change tracking files themselves generally require little maintenance after initial configuration.

QUESTION 2
You want to use the automatic management of backup and recovery operations features for your database.

Which configuration must you set?

A. Enable the flash recovery area and specify it as the archived redo log destination.
B. Disable the flash recovery area and start the database instance in ARCHIVELOG mode.
C. Enable the flash recovery area but do not specify it as the archived redo log destination.
D. Disable the flash recovery area and start the database instance in NOARCHIVELOG mode.

Answer: A

QUESTION 3
Which three types of files can be automatically placed in the flash recovery area (fast recovery area in 11g Release 2)? (Choose three.)

A. Alert log file
B. Archived redo log files
C. Control file autobackups
D. Server Parameter file (SPFILE)
E. Recovery Manager (RMAN) backup piece

Answer: BCE

Practicetest 1Z0-053 Oracle cert24

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