EXERCISES
Fill in the blanks with appropriate words or phrases．
（1）Operational software was designed to improve ．
（2）Inefficiencies in the operational software can be exampled by ．
（3）File inquiry might normally take ．
（4）The average time needed to process a task in the job queue involves ．
（5）Most of the drive’s actions do not relate to ．
（6）To analyze and evaluate the performance of a operational software programmers need ．
（7）We have listed types of statistics describing system’s overall performance level．
（8）Some complaints and operational difficulties may signal that ．
（9） is built into the operating system．
（10）Statistics can help system programmers determine if should be modified or whether must be installed．
a．processing delays，slow response times，frequent error states，and longer processing cycles
b．more precise operational data
c．existing operational software，a new operating system
d．the efficiency of computer systems
e．10
f．fractions of seconds
g．Performance management software
h．file handling
i．a(chǎn)n operating system is under stress
j．waiting time and actual processing time

答案：
（1）d
（2）a
（3）f
（4）j
（5）h
（6）b
（7）e
（8）i
（9）g
（10）c