单选题Every Sunday the Unix system administrator has a job that executes a full backup of the entire Unix system your database is on. Is this backup usable for backup and recovery of your database？（）A Yes， if the database is in ARCHIVELOG modeB Yes， if the database is in NOARCHIVELOG modeC No， the backup is not usable in any wayD Only if the ENABLE_ONLINE_BACKUP parameter is set to TRUE
单选题
Every Sunday the Unix system administrator has a job that executes a full backup of the entire Unix system your database is on. Is this backup usable for backup and recovery of your database？（）
A
Yes， if the database is in ARCHIVELOG mode
B
Yes， if the database is in NOARCHIVELOG mode
C
No， the backup is not usable in any way
D
Only if the ENABLE_ONLINE_BACKUP parameter is set to TRUE
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单选题A system administrator has filesystems that should not be mounted during system startup. How can the system administrator prevent the /data filesystem from being mounted during subsequent boots？（）Amount -no /dataBchfs -A no /dataCmount -t nfs /dataDchfs -a type=nfs /data
单选题An operator notices that a job on the system is causing poor performance. The job is a root process and the administrator has concluded it is not important and can be stopped. Shortly after stopping the process, it starts again. Which of the following commands will list repeating scheduled tasks?（）Aat -lBjobs -lCsched -lDcrontab -l