Exam 1z0-083 topic 1 question 123 discussion

BC are correct answer. Tested in lab for B. https://docs.oracle.com/cd/E11882_01/backup.112/e10643/rcmsynta007.htm#RCMRF107 A is incorrect - zdlra backups are sbt backups but not written to tape always E is incorrect - Not all are supported

BC https://docs.oracle.com/en/database/oracle/oracle-database/19/bradv/rman-backup-concepts.html#GUID-2F6EBF71-E699-4C9C-832B-9AA8566E3F47:~:text=8.3.10%20About%20RMAN%20Proxy%20Copies C - During a proxy copy, RMAN turns over control of the data transfer to a media manager that supports this feature. The PROXY option of the BACKUP command specifies that a backup is a proxy copy. Proxy copy can only be used with media managers that support it and cannot be used with channels of type DISK. B (may result unless PROXY only option) - For each file that you attempt to back up with the BACKUP PROXY command, RMAN queries the media manager to determine whether it can perform a proxy copy. If the media manager cannot proxy copy the file, then RMAN backs up the file as if the PROXY option had not been used. (Use the PROXY ONLY option to force RMAN to fail if a proxy copy cannot be performed.)

E is false. Not all vendors necessarily have products for Oracle database backup. Anyone who wants to have them in the catalog must use the API provided by Oracle to interface with the database. Each product of this type must provide a library (e.g. libobk.a on linux/unix and orasbt.dll on MSWin) which must be linked in order to use the MML

https://docs.oracle.com/en/database/oracle/oracle-database/19/bradv/rman-backup-concepts.html#GUID-2F6EBF71-E699-4C9C-832B-9AA8566E3F47

BC correct. Backs up the specified files with the proxy copy functionality, which gives the media management software control over the data transfer between storage devices and the data files on disk. The media manager—not RMAN—decides how and when to move data. When you run BACKUP with the PROXY option, RMAN performs these steps: Searches for a channel of the specified device type that is proxy-capable. If no such channel is found, then RMAN issues a warning and attempts a conventional (that is, non-proxy) backup of the specified files. If RMAN locates a proxy-capable channel, then it calls the media manager to check if it can proxy copy the files. If the media manager cannot proxy copy, then RMAN uses conventional backup sets to back up the files. Note: If you specify PROXY, then the %p variable must be included in the FORMAT string either explicitly or implicitly within %U. Note: This option does not work with AS COPY and results in an error.

BC https://docs.oracle.com/en/database/oracle/oracle-database/19/bradv/rman-backup-concepts.html#GUID-2F6EBF71-E699-4C9C-832B-9AA8566E3F47

I think E is True: "The Oracle Media Management Layer (MML) API lets third-party vendors build media management software that works with RMAN to allow backups to sequential media devices such as tape drives." (https://docs.oracle.com/en/database/oracle/oracle-database/19/bradv/rman-architecture.html#GUID-12A32971-242E-4C62-AE95-26D58D5C983D). Then, CE correct

B, C B - since PROXY option is incompatible with AS COPY, result of "backup proxy database" (in case that media manager cannot proxy copy) will probably result in backup set. not E - MML is vendor supplied not provided by Oracle support. A - "always" is always questionable

A, C Media management library - A software library that RMAN can use to back up to tertiary storage. An SBT interface conforms to a published API and is supplied by a media management vendor.

CE correct