E1信道的数据速率是(15),其中的每个话音信道的数据速率是(16)。
A.1.544Mb/s
B.2.048Mb/s
C.6.312Mb/s
D.44.736Mb/s
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What is the result of increasing the value of the parameter ASM_POWER_LIMIT during a rebalance operation?()
A、 The ASM rebalance operation will likely consume fewer resources and complete in a shorter amount of time.
B、 The ASM rebalance operation will consume fewer resources and complete in a longer amount of time.
C、 The ASM rebalance operation will be parallelized and should complete in a shorter amount of time.
D、 There is no ASM_POWER_LIMIT setting used in ASM.
E、 None of the above.
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On Friday at 11:30 am you decided to flash back the database because of a user error that occurred at 8:30am. Which option must you use to check whether a flashback operation can recover the database to the specified time?()
A、Check the alert log file
B、Query the V$FLASHBACK_DATABASE_LOG view
C、Query the V$RECOVERY_FILE_DEST_SIZE view
D、Query the V$FLASHBACK_DATABASE_STAT view
E、Check the value assigned for the UNDO_RETENTION parameter
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Which two statements are true about the duplexing of the backups taken by RMAN?()
AIt’s only supported for the backups performed on the tape
BIt is not supported for backup operations that produce image copies
CDuplex backups need a parallelism for the device to be equal to number of copies
DDuplex backups can be performed to either disk or tape, but cannot be performed on tape and disk simultaneously
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You have a very large table that your users access frequently. Which of the following advisors will recommend any indexes to improve the performance of queries against this table?()
A、The Automatic Memory Manager (AMM)
B、The SQL Tuning Advisor
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D、The SQL Access Advisor
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If you use ALTER DISKGROUP ... ADD DISK and specify a wildcard for the discovery string, what happens to disks that are already a part of the same or another disk group?()
A、 The command fails unless you specify the FORCE option.
B、 The command fails unless you specify the REUSE option.
C、 The command must be reissued with a more specific discovery string.
D、 The other disks, already part of the disk group,are ignored.