单选题A system is experiencing performance problems.  After checking the CPU usage, the problem identified is that the system is "CPU Bound".  Which of the following outcomes will determine if there is a possible CPU constraint?（）A  Low paging B  High paging

第1题：

A user is complaining that they ran out of paging space.  Which of the following will address this and  provide best performance（）

• A、Expand the default paging space to the largest possible size
• B、Create a new larger paging space
• C、Create additional paging spaces of equal size on different disks
• D、Reboot system

第2题：

A user reports that their PC is making a strange noise. Which of the following is the cause of the problem?（）

• A、A network cable is vibrating against the system case.
• B、An internal wire is improperly routed and is hitting the CPU fan.
• C、The thermal grease on the CPU has dried out and needs to be replaced.
• D、The CPU needs to be reseated.

第3题：

A system administrator has run topas on a server.  The output shows that the %iowait of the system is 60% and that most of the disk activity is on hdisk0.  Which of the following procedures should be performed to fix this problem?（）

• A、 Replace the hard disk with a faster disk drive. 
• B、 Add another paging space on another hdisk. 
• C、 Spread the data hdisk0 across several hdisks. 
• D、 Nothing, since %iowait is a measurement of CPU time.

第4题：

A customer indicates that a system is experiencing printing problems. After checking the system, and successfully printing, no problem has been found.  Which of the following procedures should be performed next to further clarify the problem?（）

• A、 Reboot the system.
• B、 Check the file system sizes.
• C、 Have the customer repeat the task to recreate the problem.
• D、 Inform the customer that no problems were found， and to call back if the problem reoccurs.

第5题：

Which of the following outputs will best indicate if a system is CPU bound?（）

• A、 %idle < 10% 
• B、 %usr + %sys > 80% 
• C、 %sys + %wio > 80% 
• D、 %wio + %idle > 80%

第6题：

In a system with high CPU utilization， which of the following will help the MOST to minimize the performance impact of parity overhead in RAID 5？（）

• A、Use all SAS Drives
• B、Triple Channel RAM
• C、Use all Solid State Drives
• D、Hardware RAID Controller

第7题：

After completing an installation of new software， a system administrator notices the system is slow.  To troubleshoot the performance， which single AIX command could be used to provide a real-time display of CPU， memory and disk utilization（）

• A、topas
• B、vmo
• C、iostat
• D、netstat

第8题：

Performance monitoring of a poorly performing system indicates a high level of CPU usage. Which tool can be used to help identify which processes are using excessive CPU resources？（）

• A、sar
• B、topas
• C、iostat
• D、vmstat

第9题：

Which of the following commands should be used to determine which disk of a system is experiencing a disk I/O performance problem？（）

• A、 filemon
• B、 istat
• C、 vmstat
• D、 iostat

第10题：

A system administrator has a server that is performing poorly. The vmstat command identifies that high CPU usage is the problem. Which of the following commands can be used to identify the eight most active processes running on the server？（）

• A、ps -ef -t8
• B、sar -u -p 8
• C、vmstat -t 8
• D、topas -p8 -n0 -d0