單項選擇題When analyzing disk I/O performance， which of the following metrics and/or statistics should be included in the study？（）

A. Disk size， stock availability， VHDCI
B. Disk size， distance， temperature， and compatibility
C. Disk fragmentation， MTBF， and maintenance
D. Disk configuration， throughput， transactions， queues， and latencies


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1.單項選擇題Which of the following commands can be used to commit applied filesets？（）

A. /usr/sbin/installp -C
B. /usr/sbin/inutoc -c
C. /usr/sbin/installp -c
D. /usr/sbin/lsresource -c

2.單項選擇題The bos.perf package is part of the base operating system. Performance Diagnostic tool， PDT， is a part of bos.perf.  All of the following statements are true EXCEPT？（）

A. PDT attempts to identify performance problems automatically by collecting and integrating a wide range of performance， configuration and availability data.
B. PDT consists of three components， the collection component comprises a set of programs that periodically collect and record data， the retention component periodically reviews the collected data and discards data that is obsolete， and the reporting component periodically produces a diagnostic report from the current set of historical data.
C. PDT contains  motif-based， AIX licensed programs that can easily access tools for system and network performance tuning， monitoring， and analysis.
D. PDT assesses the current state of a system and tracks changes in workload and performance. It attempts to identify incipient problems and suggest solutions before the problems become critical.

3.單項選擇題All of the following comprise the Performance Toolbox EXCEPT：（）

A. perfmgr
B. perfagent.server
C. perfagent.tools
D. perfagent.client

4.單項選擇題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

5.單項選擇題Where can the perfagent.tools fileset be found？（）

A. AIX Base CD
B. AIX BonusPak CD
C. AIX Performance Toolbox product CD
D. Performance AIDE product CD

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To examine the Exhibit， press the Exhibit button. While a user is compiling a C program， "vmstat 120 10" is run to determine the cause of a performance problem.  Using the vmstat output as shown in the exhibit， which of the following conclusions is most appropriate to draw about the I/O bottleneck？（）

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