Multiple Choice Questions 2
Question1
A primary objective of an operating system is:
选择一个答案
a. Ability to evolve |
b. Convenience |
c. Efficiency |
d. All of the above |
Feedback:
操作系统的三个主要目标：方便，有效，扩展的能力
Question2
The paging system in a memory management system provides for dynamic mapping between a virtual address used in a program and:
选择一个答案
a. A real address in a program |
b. None of the above |
c. A virtual address in main memory |
d. A real address in main memory |
Feedback：
The paging system provides for a dynamic mapping between the virtual address used in the program and a real address, or physical address, in main
memory. P51
Question3
Relative to information protection and security in computer systems, access control typically refers to:
选择一个答案
a. The flow of data within the system |
b. Proving that security mechanisms perform according to specification |
c. Regulating user and process access to various aspects of the system |
d. None of the above |
Feedback：
调节用户和进程对系统方方面面的访问权限
Question4
A common problem with full-featured operating systems, due to their size and difficulty of the tasks they address, is:
选择一个答案
a. Sub-par performance |
b. Chronically late in delivery |
c. All of the above |
d. Latent bugs that show up in the field |
Feedback：
一个功能完善的操作系统的大小和它所处理任务的困难性，导致了四个让人遗憾但又普遍存在的问题：
① 操作系统在交付使用时习惯性表现出落后
② 系统有潜在的错误
③ 总是难以达到期望的性能
④ 不可能开发出既复杂又不易受各种安全性攻击的操作系统
P 54
Question5
A technique in which a process, executing an application, is divided into threads that can run concurrently is called:
选择一个答案
a. None of the above |
b. Multithreading |
c. Symmetric multiprocessing (SMP) |
d. Multiprocessing |
Feedback：
Multithreading is a technique in which a process, executing an application, is divided into threads that can run concurrently. P56
Question6
WIN2K supports several types of user applications, including:
选择一个答案
a. Linux |
b. System 10 |
c. WIN32 |
d. None of the above |
Feedback：
Nothing~
Question7
Key to the success of Linux has been it’s character as a free software package available under the auspices of the:
选择一个答案
a. Berkeley Software Distribution |
b. Free Software Foundation |
c. World Wide Web Consortium |
d. None of the above |
Feedback：
Key to the success of Linux has been the availability of free software packages
under the auspices of the Free Software Foundation (FSF). P70
Question8
The operating system provides many types of services to end-users, programmers and system designers, including:
选择一个答案
a. Built-in user applications |
b. All of the above |
c. Relational database capabilities with the internal file system |
d. Error detection and response |
Feedback：
the OS typically provides services in the following areas：• Program development • Program execution • Access to I/O devices
• Controlled access to files • System access • Error detection and response • Accounting
Question9
The operating system is unusual in it’s role as a control mechanism, in that:
选择一个答案
a. It runs on a special processor, completely separated from the rest of the system |
b. It never relinquishes control of the system processor |
c. None of the above |
d. It frequently relinquishes control of the system processor and must depend on the processor to regain control of the system |
Feedback：
• The OS functions in the same way as ordinary computer software; that is, it is a program or suite of programs executed by the processor.
• The OS frequently relinquishes control and must depend on the processor to allow it to regain control. P40
Question10
Operating systems must evolve over time because
选择一个答案
a. Users will only purchase software that has a current copyright date |
b. New hardware is designed and implemented in the computer system |
c. All of the above |
d. Hardware must be replaced when it fails |
Feedback：
计算机需要不断发展的原因：硬件升级和新型硬件的出现、新的服务、纠正错误
P 40/41
Question11
A major problem with early serial processing systems was:
选择一个答案
a. Inability to get hardcopy output |
b. Setup time |
c. Lack of input devices |
d. All of the above |
Feedback：
调度和准备时间
Question12
An example of a hardware feature that is desirable in a batch-processing system is
选择一个答案
a. None of the above |
b. A completely accessible memory area |
c. Large clock cycles |
d. Privileged instructions |
Feedback：
内存保护、定时器、特权指令、中断
Question13
A computer hardware feature that is vital to the effective operation of a multiprogramming operating system is:
选择一个答案
a. Very large memory |
b. Multiple processors |
c. I/O interrupts and DMA |
d. All of the above |
Feedback：
支持I/O中断和直接存储器访问
Question14
The principle objective of a time sharing, multiprogramming system is to
选择一个答案
a. Maximize processor use |
b. None of the above |
c. Provide exclusive access to hardware |
d. Maximize response time |
Feedback：
批处理多道程序设计是为了充分使用处理器，分时多道程序设计是为了减小响应时间
Question15
Which of the following major line of computer system development created problems in timing and synchronization that contributed to the development of the concept of the process?
选择一个答案
a. Multiprogramming batch operation systems |
b. Real time transaction systems |
c. All of the above |
d. Time sharing systems |
Feedback：
Three major lines of computer system development created problems in timing and synchronization that contributed to the development of the concept of the process: multiprogramming batch operation, time sharing, and real-time transaction systems.
Question16
Which of the following major line of computer system development created problems in timing and synchronization that contributed to the development of the concept of the process?
选择一个答案
a. Multiprogramming batch operation systems |
b. Real time transaction systems |
c. Time sharing systems |
d. All of the above |