单选题A system administrator is monitoring a system that has recently shown a decrease in performance.The administrator suspects that the system may be low on memory and may be paging excessively.Which of the following commands is best to identify a possible

第1题：

A system administrator increases the mbuf pool allocation， then runs vmstat. It is noticed that the paging rate has not decreased. What is the most effective option to maintain the mbuf pool and decrease paging？（）

• A、 Increase the number of CPUs.
• B、 Increase the physical memory.
• C、 Set the PSALLOC environment variable to ’late’.
• D、 Set the PSALLOC environment variable to ’early’.

第2题：

A System p administrator needs to document system changes that have occurred recently. The company has a policy of making all possible changes via the smit interface.  Which of the following files would show the commands that have been performed from within smit and their resulting output（）

• A、/smit.log
• B、/smit.script
• C、/var/log/smit.log
• D、/.history

第3题：

The server administrator discovers that a server， which has not been patched， is runningextremely slow and suspects that the server may have been compromised. Which of the following commands should the administrator use to check the number of network connections the server is making？（）

• A、netstat
• B、ping
• C、nslookup
• D、grep

第4题：

A System p administrator is attempting to restore some files from a backup tape. The restore failed. The system administrator suspects the block size of the tape drive is incorrect.  Which of the following commands can be used to determine the block size of the backup tape （）

• A、dd
• B、tar
• C、cpio
• D、restore

第5题：

An administrator has a requirement to mirror the operating system on a VIO server. Which of the following IOS commands will achieve this？（）

• A、 mirrorvg
• B、 iosmirror
• C、 mirrorios
• D、 mkiosmirror

第6题：

A system administrator has edited the necessary files for setup of an AIX system to serve as a bootp server.  Which of the following commands is required to complete the activation？（）

• A、telinit -q
• B、startsrc -s bootpd
• C、refresh -s inetd

第7题：

Which of the following commands would a system administrator use to automate monitoring and notification of filling filesystems （）

• A、startcondresp
• B、filemon
• C、lsfs
• D、mount

第8题：

A user suspects that a recently installed program overwrote a Windows system file on the computer. Which of the following commands could be run to check and verify the system files？（）

• A、system /v
• B、winnt /s
• C、sfc /scannow
• D、chkdsk /f

第9题：

A system administrator has just finished upgrading a system to AIX 5.2. If there are future problems， the system administrator would like to add an entry to the AIX errorlog to record this event. Which of the following commands can be issued for this purpose？（）

• A、/usr/bin/errmsg "System upgraded to AIX 5.2"
• B、/usr/bin/errlog "System upgraded to AIX 5.2"
• C、/usr/bin/errupdate "System upgraded to AIX 5.2"
• D、/usr/bin/errlogger "System upgraded to AIX 5.2"

第10题：

A system administrator is attempting to restore some files from a backup tape. The restore failed. The system administrator suspects the block size of the tape drive is incorrect. Which of the following commands can be used to determine the block size of the backup tape？（）

• A、dd
• B、tar
• C、cpio
• D、restore