单选题You have configured the following： RMAN CONFIGURE DEFAULT DEVICE TYPE TO ’sbt’； new RMAN configuration parameters： CONFIGURE DEFAULT DEVICE TYPE TO ’sbt’； new RMAN configuration parameters are successfully stored RMAN SHOW DEVICE TYPE； RMAN configuration parameters are： CONFIGURE DEVICE TYPE SBT PARALLELISM 1； # CONFIGURE DEVICE TYPE DISK PARALLELISM 1； # RMAN CONFIGURE DEVICE TYPE SET PARALLELISM 5； RMAN SHOW DEVICE TYPE； RMAN configuration parameters are： CONFIGURE DEVICE TYPE SBT PARALLELISM 5； CONFIGURE DEVICE TYPE DISK PARALLELISM 1； # How many channels are allocated to SBT？（）A0， because channels have not been defined.B3， as indicated by the degree of parallelism.C1， the default value when device is configured.D5， as indicated by the last parallelism command.
单选题
You have configured the following： RMAN> CONFIGURE DEFAULT DEVICE TYPE TO ’sbt’； new RMAN configuration parameters： CONFIGURE DEFAULT DEVICE TYPE TO ’sbt’； new RMAN configuration parameters are successfully stored RMAN> SHOW DEVICE TYPE； RMAN configuration parameters are： CONFIGURE DEVICE TYPE SBT PARALLELISM 1； # CONFIGURE DEVICE TYPE DISK PARALLELISM 1； # RMAN> CONFIGURE DEVICE TYPE SET PARALLELISM 5； RMAN> SHOW DEVICE TYPE； RMAN configuration parameters are： CONFIGURE DEVICE TYPE SBT PARALLELISM 5； CONFIGURE DEVICE TYPE DISK PARALLELISM 1； # How many channels are allocated to SBT？（）
A
0， because channels have not been defined.
B
3， as indicated by the degree of parallelism.
C
1， the default value when device is configured.
D
5， as indicated by the last parallelism command.
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