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單項(xiàng)選擇題

After the /etc/tunables/nextboot file has been edited, which command can be used to validate changes to the IO performance tuning settings?（）

A.ioo -v nextboot
B.ioo -c nextboot
C.valcheck -f nextboot
D.tuncheck -r -f nextboot

單項(xiàng)選擇題

Which presents the heirarchical relationship between LVM entities?（）

A.VolumeGroup>PhysicalVolume>LogicalVolume>Filesystem
B.PhysicalVolume>VolumeGroup>LogicalVolume>Filesystem
C.VolumeGroup>PhysicalVolume>Filesystem>LogicalVolume
D.PhysicalVolume>VolumeGroup>Filesystem>LogicalVolume