-
XX
大学
2011
——
2012
学年第一学期
《
操作系统
》
期末考试试题(
A
)
考
试
注
意
事
项
考试
课程
题号
满分
得分
阅卷
教师
一
二
三
考试时间
四
五
年
月
日
六
七
八
总分
一.选择题(
20
分,每题
1
分)
1.
Generally
speaking,
which
one
is
not
the
major
concern
for
a
operating
system in the following four options?(
D
)
the computer
the system resources
and
apply
the
interface
between
user's
program
and
computer
hardware system
-level programming language complier
2.
The main disadvantage of batch system is (
C
)
utilization is low
not concurrent
of interaction
degree of automation
1
/
9
3.
A
process
transforms
from
waiting
state
to
ready
state
is
caused
by
the
(
B
)
upt event
s scheduling
a process for a program
g for some events
4.
The concurrent process is refers to (
C
)
process can be run in parallel
process can be run in order
process can be run in the same time
process can not be interrupted
5.
In multi- process system, in order to ensure the integrity of public variables,
the
processes
should
be
mutually
exclusive
access
to
critical
areas.
The
so-called critical area is (
D
)
A.A buffer
B.A date area
onization mechanism
D.A program
6.
The
orderly
use
of
resources
allocation
strategy
can
destroy
the
condition
(
D
) to avoid deadlock.
exclusive
and wait
preemption
ar wait
7.
User's applications use the system resources to complete its operation by the
support and services of (
C
)
ng the mouse
rd command
call
cal user interface
8.
There are four jobs arrived at the same time and the execution time of each
job
is
2h.
Now
they
run
on
one
processor
at
single
channel,then
the
average
turnaround time is ( B
)
A.1h
B.5h
C.2.5h
D.8h
9.
Among the job scheduling algorithms, ( B ) is related to the job's estimated
2
/
9
running time.
scheduling algorithm
-job-first scheduling algorithm
response ratio algorithm
ed scheduling
memory management, the purpose of using the overlay and s is (
C
)
g main memory
ing main memory physically
main memory space
ing CPU utilization
the page-replacement algorithm,which one can cause the Belady
phenomenon? (
A
)
NG
12.
The following description of the system in safe state,which one is
correct?(
B
)
must cause deadlock if the system is in insecure state
may cause deadlock if the system is in insecure state
may cause deadlock if the system is in secure state
are wrong
lly, when we talk about
(
C
)
t hardware memory from damaging
t program from losing in memory
t the cross-border call between programs
t the program from being peeped
actual capacity of virtual memory is equal to (
B
)
capacity of external memory(disk)
sum of the capacity of external memory and main memory
space that the CPU logical address gives
smaller one between the option B and C
al file's organization is determined by (
D
)
ations
memory capacity
al memory capacity
ing system
3
/
9
16.A computer system is configured with two plotters and three printers,in
order to properly drive these devices,system should provide (
C
) device
driver program.
A.5
B.3
C.2
D.1
there are fewer number of channels in system ,it may cause
bottlenecks”. To
solve this problem, which of the follow options is not the
effective way?(
A
)
ing the speed of CPU
the virtual device technology
some hardware buffer on the devices
sing the path between devices and channels
I/O devices and main memory are exchanging data, it can be achieved
without CPU's frequently intervention, this way of exchanging data is called
(
C
)
g
upts
memory access
of them
19.
The following description of device management, which one is not
correct?(
B
)
external devices are managed by the system in uniform
l is a software of controlling input and output
I/O interrupt events from the I/O channel are managed by device
management
of the responsibility of the operating system is to use the hardware
effectively
operating system used (
A
), it realized a mechanism that we can
use more space to save more time.
NG
l storage
l
y
二.填空题(
20
分,每空
1
分)
re
may
trigger
an
interrupt
by
executing
a
special
operation
called
a
4
/
9
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