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IBM(000-234) 问题列表
问题
单选题An AIX system， which is running a database， is having performance issues with I/O writing. The DBA has provided numbers for the HIGH and LOW watermarks for pending file writes， which will optimize the system for best performance. To set these numbers， which of the following commands would be used？（）A
perfmon -h 30 -l 25B
chdevC
no -oD
smit chgsys
问题
单选题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’.
问题
单选题A typical example of a process # 19082 in the /proc file would be： # ls -l /proc/19082 total 0 dr-xr-xr-x 1 root system 0 Sep 15 15：12 . dr-xr-xr-x 1 root system 0 Sept 15 15：12 .. -rw------- 1 root system 0 Sept 15 15：12 as -r-------- 1 root system 128 Sept 15 15：12 cred --w------- 1 root system 0 Sept 15 15：12 ctl dr-xr-xr-x 1 root system 0 Sept 15 15：12 lwp -r-------- 1 root system 0 Sept 15 15：12 map dr-x------ 1 root system 0 Sept 15 15：12 object -r--r--r-- 1 root system 448 Sept 15 15：12 psinfo -r-------- 1 root system 1024 Sept 15 15：12 sigact -r-------- 1 root system 1520 Sept 15 15：12 status -r--r--r-- 1 root system 0 Sept 15 15：12 sysent Writing to which of the following files will allow the owner to stop a process？（）A
statusB
sysentC
ctlD
as
问题
单选题Which of the following commands can be used to obtain information about filesets on the system that are later than the current maintenance level？（）A
lslpp -IB
uname -rC
oslevel -gD
rpcinfo -p
问题
单选题Which of the following commands is used to display detailed ethernet statistics for ent0？（）A
ifconfig ent0B
entstat -d ent0C
netstat -iD
lscfg -vl ent0
问题
单选题A system administrator would like to set a system to reboot after a crash. What is the best way to do this？（）A
smit chgsysB
bosbootC
smit dumpD
bootlist -r
问题
单选题Which of the following commands should be used to tune parameters of devices that are displayed with lsattr？（）A
chdevB
cfgmgrC
vmtuneD
schedtune
问题
单选题Which of the following commands will reset NFS options to their defaults？（）A
nfso -dB
nfso -cC
startsrc -g nfs -dD
startsrc -g nfs -r
问题
单选题In order to ensure best read performance， which of the following indicates how large an application’s read buffer size should be if the filesystem to be read is striped across N disks using LVM striping？（）A
N times the stripe unit sizeB
N times the VMM minfree parameterC
The same value as that of the VMM maxfree parameterD
The same value as that of the VMM maxrndwrt parameter
问题
单选题When monitoring a system using vmstat with an interval， which of the following conclusions should be drawn about the metrics under page pi and page po？（）A
The values do not include working storage.B
The values do not include persistent storage.C
The values include both persistent and working storage.D
The values are not working or persistent storage.
问题
单选题A system has users doing interactive work while background jobs are running. Interactive users are requesting that system response time be improved for foreground processes. Which tuning parameters should be changed to accomplish this？（）A
schedtune -hB
schedtune -rC
vmtune -fD
schedtune -w
问题
单选题Which of the following commands is used to adjust the minperm and Maxperm values of real memory to 4% and 80%？（）A
vmtune -N4 -M80B
vmtune -f4 -F80C
vmtune -l4 -L80D
vmtune -p4 -P80
问题
单选题Which of the following commands displays the number of system calls per second that are being executed？（）A
sarB
pstatC
iostatD
filemon
问题
单选题Which of the following commands can be used to watch system errors as they are logged？（）A
smit errptB
smit errdemonC
smit alogD
smit syslogd
问题
单选题In an iostat report， which of the following options best describes the value of % idle？（）A
A representation of the equation （tps/kbps）*100B
The percentage of time the disks are idle with no activityC
The percentage of time the disks are idle with no outstanding CPU requestsD
The percentage of time the CPU is idle with no outstanding disk I/O requests