IBM(000-234)章节练习(2019.04.23)

单项选择题
A small company would like help in identifying an apparent system performance problem on its internal mail server， especially to determine peak hour usage. What would be the first step in identifying the problem？（）
A. cd /var/spool/cron/crontabs，uncomment the lines in the adm file， in order to start gathering statistics.
B. cd /var/spool/cron/crontabs； uncomment the lines in the sys file， in order to start gathering statistics.
C. cd /usr/lib/cron/； vi the adm file； startsrc -s sadc
D. cd /usr/lib/cron/； vi the sys file； startsrc -s sadc
单项选择题
Which of the following commands should be used to monitor the number of threads on the scheduler’s run queue for any given interval？（）
A. sar
B. pstat
C. iostat
D. filemon
单项选择题
In an iostat report， which of the following options best describes the value of % iowait？（）
A. The amount of time taken to service an I/O interrupt
B. The percentage of time CPU（s） are waiting for page ins
C. The percentage of time the CPU9（s） are waiting on network
D. The percentage of time the CPU（s） are waiting for outstanding disk I/O requests
单项选择题
Which of the following logical volume placement policies is likely to give the best performance in most cases， all other factors being equal？（）
A. INTRA-POLICY set to ’edge’， INTER-POLICY set to maximum
B. INTRA-POLICY set to ’center’， INTER-POLICY set to maximum
C. INTRA-POLICY set to ’middle’， INTER-POLICY set to minimum
D. INTRA-POLICY set to ’center’， INTER-POLICY set to minimum
单项选择题
Which of the following WLM commands should be used to monitor performance on a system running wlm？（）
A. wlmcntrl
B. wlmstat
C. wlmcheck
D. wlmassign
单项选择题
The rmss command provides the facility to run an application over a range of memory sizes and display the performance statistics. How is the simulated memory reset to the real memory of the machine？（）
A. rmss -c
B. rmss -p
C. rmss -r
D. rmss -s
单项选择题
Users complain an AIX server is running slow. Which of the following commands can be run to determine what is consuming systems resources？（）
A. tprof
B. lpstat
C. ps aux
D. entstat
单项选择题
Which of the following commands is run to adjust the number of free paging-space pages at which AIX begins killing processes？（）
A. schedtune
B. rmss
C. rmps
D. vmtune
单项选择题
Using the schedtune output， memory is considered over-committed if：（）
A. more than one process is spinning.
B. more than 4 processes become active.
C. the system schedules more than 16 processes.
D. the pageouts divided by page steals is greater than 1/h.
单项选择题
Which fastpath would be used to go directly to commit applied software？（）
A. smit commit
B. smit install
C. smit software
D. smit verify_install