单项选择题
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
单项选择题 WhichpresentstheheirarchicalrelationshipbetweenLVMentities？（）
单项选择题 Whichcommandwillactivateadefinedpagingspace？（）
单项选择题 AIXshowsthebootorderinthefollowingoutput：hdisk0hdisk1blv=hd5cd0Whatwillhappenwhenthesystemadministratorrebootstheserver？（）
