Which statement is true about the compression algorithms that RMAN can use?

You want to use RMAN to create compressed backups.
Which statement is true about the compression algorithms that RMAN can use?

You want to use RMAN to create compressed backups.
Which statement is true about the compression algorithms that RMAN can use?

A.
The BZIP2 compression algorithm consumes more CPU resources than the ZLIB
compression algorithm.

B.
The ZLIB compression algorithm consumes more CPU resources than the BZIP2
compression algorithm.

C.
The ZLIB compression algorithm provides maximum compression and produces smaller
backups than the BZIP2 compression algorithm.

D.
Only the BZIP2 compression algorithm can be used to make compressed backups to
disk.

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Jake from SF

Jake from SF

A is correct:

https://docs.oracle.com/cd/B28359_01/backup.111/b28270/rcmconfa.htm

RMAN supports binary compression of backup sets. The supported algorithms are BZIP2 (default) and ZLIB. The BZIP2 algorithm is optimized for maximum compression, whereas the ZLIB algorithm is optimized for CPU efficiency. BZIP2 consumes more CPU resource than ZLIB, but will usually produce more compact backups. The COMPATIBLE initialization parameter must be set to 11.0.0 or higher for ZLIB compression, which requires the Oracle Advanced Compression option.

You can configure the compression algorithm with the following syntax, where alg_name is a placeholder specifying either BZIP2 or ZLIB.

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