单项选择题

Which of the following commands should be used to tune parameters of devices that are displayed with lsattr？（）

A. chdev
B. cfgmgr
C. vmtune
D. schedtune

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单项选择题

Which of the following commands should be used to identify packet sequence problems？（）

A. ping and arp
B. lsattr and ifconfig
C. netstat and iostat
D. iptrace and tcpdump

单项选择题

In AIX 5L and later， the operating system supports the /proc filesystem. What would be the best description of the /proc filesystem？（）

A. It is a pseudo filesystem that maps processes and kernel data structures to corresponding files.
B. It is a JFS mounted filesystem that provides an exact representation of what is happening to a proces at a single and discrete point of time.
C. It is a JFS mounted filesystem that maps processes and read-only files related to these processes.
D. It is a pseudo filesystem that contains data that represents the state of the parent processes （but not their threads） in a system.

单项选择题

Which command series should be used to determine whether file paging or paging space paging is a problem when running a program from an idle system？（）

A. foo ； lsps -s
B. tprof -kx ； foo
C. iostat ； foo ； iostat
D. vmstat -s ； foo ； vmstat s