Exam 1z0-062 topic 1 question 175 discussion

D IS RIGHT

correct answer is D :If there is no level 0 backup when you attempt a level 1 backup, RMAN will realize this and rather than returning an error will in fact perform a level 0 backup. (i just copy it from oracle doc)

Takes level 0 then level 1 backup

D is correct. Sample spool for given commands (ran BACKUP AS BACKUPSET DATABASE first): BACKUP INCREMENTAL LEVEL 1 DATABASE; Starting backup at 18-APR-22 using channel ORA_DISK_1 no parent backup or copy of datafile 10 found no parent backup or copy of datafile 8 found no parent backup or copy of datafile 7 found no parent backup or copy of datafile 9 found channel ORA_DISK_1: starting incremental level 0 datafile backup set -----Level 0 backup being taken .... Finished backup at 18-APR-22

E is actually correct. I verified using 12.1.0.2. My RMAN output is too large to post as a comment but I will explain my output. I took a backupset using the first command in the questions, which was done successfully. Upon completion of the previous command, I took an incremental level 1 backup. My initial output started as "no parent backup or copy of datafile x found" meaning that a previous level 0 backup of the specified datafiles were not detected. RMAN immediately began initiating a level 0 backup "channel ORA_DISK_1: starting compressed incremental level 0 datafile backup set" for each datafile without a level 0 backup taken. A level 1 backup began immediately after the completion of the level 0 backups, which I observed in the output "channel ORA_DISK_1: starting compressed incremental level 1 datafile backup set" In this case, E is correct

I think E: The only difference between a level 0 incremental backup and a full backup is that a full backup is never included in an incremental strategy. A level 1 incremental backup can be either of the following types: A differential backup, which backs up all blocks changed after the most recent incremental backup at level 1 or 0 A cumulative backup, which backs up all blocks changed after the most recent incremental backup at level 0

E is right. Did the test on my own HW

If no level 0 backup is available, then the behavior depends upon the compatibility mode setting. If compatibility is >=10.0.0, RMAN copies all blocks changed since the file was created, and stores the results as a level 1 backup. In other words, the SCN at the time the incremental backup is taken is the file creation SCN. If compatibility <10.0.0, RMAN generates a level 0 backup of the file contents at the time of the backup, to be consistent with the behavior in previous releases.

SHOULD BE C