淡江大學 九十一 學年度第 一 學期
考試科目： 作業系統
系(所)級班別：資訊管理系
3年
C班
期中 考試命題紙
命題教授簽章：
考試日期：11 月 18 日第 2 節 准帶項目請打「O」否則打「X」 1、須加發計算紙請在試題內封袋備註。
2、本命題紙為 A4 大小，內容多時可以較小(10)字體
計算機 課本 筆記
字典
本試題共 3 頁 P. 印刷 65 份
繕打。印刷格式請勾選：( )二張 A4 併成一張 B4
X
X
X
X
備註：請直接在命題紙上作答
印刷( )依 A4 原稿印刷。(√ )放大成 B4 印刷。
Name: ____________
StdNo(學號):____________
Class(修課班級):_____
SeatNo(學分座號):_____
True-False Questions: (Please answer with ╳ or ○) (22%)
(
) 1. Since OS is only software, the changes in the design of the hardware has no influence on it.
(
) 2. When a process executes, it typically executes for a long time before it either finishes or needs to perform I/O.
(
) 3. Random access memory (RAM) can only be accessed by CPU, no other device can directly communicate with it.
(
) 4. Being another kind of processor, device controllers cannot execute concurrently with the CPU.
(
) 5. The concept of cache memory can be applied only between CPU and memory in the storage device hierarchy.
(
) 6. A program is a passive entity and a process is an active entity with a program counter specifying the next
instruction to execute.
(
) 7. The execution of a process is not necessarily to be sequential.
(
) 8. System calls should be made directly from C or C++, they usually cannot be called from low-level languages
such as assembly.
(
) 9. In message-passing communication model, information is exchanged through an interprocess-communication
facility provided by the operating system.
(
) 10. System research and development can be done on the virtual machine without disrupt normal system operation.
(
) 11. Message passing is useful when smaller numbers of data need to be exchanged.
(
) 12. With layered approach, an operating system can be debugged and verified without any concern for the lower
layer.
(
) 13. Windows NT 4.0 partially redressed the performance problem of the first release of Windows NT by removing
multiple layers into single integrated layer.
(
) 14. Not only the CPU, but also the resources such as file systems and line printers are also shared for the illusion of
virtual machines.
(
) 15. The Java API is also included as a part of the Java virtual machine.
(
) 16. During system design, although mechanisms are strongly affecting policies, it is better to separate the policy
from the mechanism.
(
) 17. Although an operating system today is overwhelmingly complex, it is still possible to have it implemented in
assembly language.
(
) 18. Two processes associated with same program are considered the same separate execution sequences.
(
) 19. There are five states a process can be in, and only one process can be in running state at any instance.
(
) 20. The long-term scheduler selects which processes should be brought in to the ready queue.
(
) 21. Context-switch time is an overhead because the system cannot do useful work while switching.
(
) 22. The parent processes and the children processes created by the parent can be executed concurrently.
Multiple Choices, Single Answer Questions: (Please answer with capital letter(大寫字母).) (18%)
(
) 1. There are four components comprise a computer system, including hardware, __________, application programs,
and users.
(A) CPU (B) Windows (C) Hard disk (D) Operating Systems
(
) 2. In __________ systems, jobs with similar needs are grouped together before ran them through the computer for
speeding up its processing.
(A) Concurrent (B) distributed (C) batched (D) multiprogrammed (E) real-time
(
) 3. In multiprogrammed batch systems, several jobs are kept in main memory at the same time, and the CPU is
_____________ among them.
(A) multiplexed (B) distributed (C) selecting (D) in-line (E) off-loaded
(
) 4. Which program loads the operating system into the memory?
(A) kernel (B) spooling (C) I/O (D) control (E) bootstrap
(
) 5. Operating system is ___________ driven.
(A) data (B) signal (C) message (D) interrupt (E) software
(
) 6. It is possible to overlap useful computation with I/O in ______________I/O.
(A) non-synchronous (B) synchronous (C) asynchronous (D) semi-synchronous
注意：1、考試求公平及公正，請同學務必自律，維護學校與學生之榮譽。
2、考試時不得交談、攜卷出場、窺視、傳遞、代考、夾帶等違規行為，違者將受嚴重議處。
淡江大學 九十一 學年度第 一 學期
考試科目： 作業系統
系(所)級班別：資訊管理系
3年
C班
期中 考試命題紙
命題教授簽章：
考試日期：11 月 18 日第 2 節 准帶項目請打「O」否則打「X」 1、須加發計算紙請在試題內封袋備註。
2、本命題紙為 A4 大小，內容多時可以較小(10)字體
計算機 課本 筆記
字典
本試題共 3 頁 P. 印刷 65 份
繕打。印刷格式請勾選：( )二張 A4 併成一張 B4
X
X
X
X
備註：請直接在命題紙上作答
印刷( )依 A4 原稿印刷。(√ )放大成 B4 印刷。
(
(
(
(
(
(
(
(
(
(
(
(
) 7. Device controller transfers blocks of data from buffer storage directly to main memory without CPU
intervention is called
(A) Cycle stealing (B) Memory protection (C) Buffering (D) Direct memory access
) 8. The only large storage media that the CPU can access directly is
(A) main memory (B) control storage (C) flash memory (D) hard disk (E) associative memory
) 9. The instruction loaded into the instruction register of a CPU is
(A) assembly instruction (B) compiled instruction (C) control storage instruction (D) high-level instruction
(E) machine-level instruction
) 10. After fetching the instruction, it is decoded by using its __________ to index into the proper control storage
instruction.
(A) status word (B) operand (C) op code (D) address (E) register
) 11. Memory-mapped I/O set aside ranges of memory addresses and mapped to
(A) device registers (B) cache memories (C) control storages (D) hard disks
) 12. The _________ instructions can be issued only In the monitor mode of the dual-mode operation.
(A) control (B) activated (C) privileged (D) prioritized
) 13. A distributed network is a collection of _________ connected through communication lines.
(A) processors (B) memories (C) drivers (D) ports (E) slots
) 14. ________ is a new access method removing the need for a user to login before she is allowed to use a remote
resource.
(A) answer (B) hang up (C) dial (D) WWW (E) wait
) 15. The greatest advantage by dividing operating system into layers is
(A) flexibility (B) convenience (C) effectiveness (D) modularity (E) ease of control
) 16. A process includes its text section, ___________, program counter and stacks.
(A) data section (B) queue (C) memory (D) registers (E) variables
) 17. The context of a process is represented in the _______of a process.
(A) kernel (B) PCB (C) control storage (D) queue
) 18. The __________-term scheduler is used when the system has overcommitted available memory, requiring
memory to be freed up.
(A) long (B) medium (C) short (D) dynamic
Short Answer Question: (60%)
1. (8%)What is an Operating System? Please briefly give its definition.
2. (8%)What are the differences between synchronous I/O and asynchronous I/O?
Explain the true meaning of synchronous as discussed in the class.
3. (6%)Complete the Java compile-time and run-time environment on the right.
注意：1、考試求公平及公正，請同學務必自律，維護學校與學生之榮譽。
2、考試時不得交談、攜卷出場、窺視、傳遞、代考、夾帶等違規行為，違者將受嚴重議處。
淡江大學 九十一 學年度第 一 學期
考試科目： 作業系統
系(所)級班別：資訊管理系
3年
C班
期中 考試命題紙
命題教授簽章：
考試日期：11 月 18 日第 2 節 准帶項目請打「O」否則打「X」 1、須加發計算紙請在試題內封袋備註。
2、本命題紙為 A4 大小，內容多時可以較小(10)字體
計算機 課本 筆記
字典
本試題共 3 頁 P. 印刷 65 份
繕打。印刷格式請勾選：( )二張 A4 併成一張 B4
X
X
X
X
備註：請直接在命題紙上作答
印刷( )依 A4 原稿印刷。(√ )放大成 B4 印刷。
4. (8%)Java is a programming language allowing cross-platform execution, however, it does not allow system calls to be
made directly. Please explain why and give the solution for that.
5. (8%)Give two reasons why caches are useful. What problems do they solve? What problems do they cause?
6. (8%)Although implementing an operating system in higher-level language has reduced speed and increased storage
requirement, today’s OS still are implemented in high-level languages. Why?
7. (6%)Please complete the state transition diagram on the
right.
8. (8%)Consider following C program with fork command
and answer the following questions:
(a) Which command cause the child process to be created? _________
(b) Is the parent and the child is executing same copy of the program? ______
(c) Is the parent and the child going through the same path of execution? ______
(d) What is the PID of the child process? _______
(e) Which process will be terminated first? _________
#include <stdio.h>
Void main(int argc, char *argv[])
{int pid;
pid = fork();
if (pid < 0) {
fprintf(stderr, “Fork Failed”);
exit(-1);
}
else if (pid == 0) {
execlp(“/bin/copy”,”copy”,Null);
}
else {
wait(NULL);
printf(“Child Complete”);
exit(0);
}
}
注意：1、考試求公平及公正，請同學務必自律，維護學校與學生之榮譽。
2、考試時不得交談、攜卷出場、窺視、傳遞、代考、夾帶等違規行為，違者將受嚴重議處。