操作系统选择题库答案及详解

Multiple Choice Questions 1Question1The general role of an operating system is to:选择一个答案a. Provide a set of services to system usersb. Manage files for application programsc. Act as an interface between various computersd. None of the aboveFeedback:A. 为系统用户提供一系列服务B. 为应用程序管理文件(这显然不是)C. 作为多台计算机间的接口(应该是 CPU 与硬件之间的接口)D. errorQuestion2Information that must be saved prior to the processor transferring control to the interrupt handler routine includes:选择一个答案a. Program Status Word (PSW) 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. P40Question10Operating systems must evolve over time because选择一个答案a. Users will only purchase software that has a current copyright dateb. New hardware is designed and implemented in the computer systemc. All of the aboved. Hardware must be replaced when it failsFeedback：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 40/41Question11A major problem with early serial processing systems was:选择一个答案a. Inability to get hardcopy outputb. Setup timec. Lack of input devicesd. All of the aboveFeedback：调度和准备时间Question12An example of a hardware feature that is desirable in a batch-processing system is选择一个答案a. None of the aboveb. A completely accessible memory areac. Large clock cyclesd. Privileged instructionsFeedback：内存保护、定时器、特权指令、中断Question13A 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 memoryb. Multiple processorsc. I/O interrupts and DMAd. All of the aboveFeedback：支持 I/O 中断和直接存储器访问Question14The principle objective of a time sharing, multiprogramming system is to选择一个答案a. Maximize processor useb. None of the abovec. Provide exclusive access to hardwared. Maximize response timeFeedback：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Question15Which 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 systemsb. Real time transaction systemsc. All of the aboved. Time sharing systemsFeedback：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.Question16Which 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 systemsb. Real time transaction systemsc. Time sharing systemsd. All of the aboveMultiple Choice Questions 3Question1The behavior of a processor can be characterized by examining:选择一个答案a. Multiple process tracesb. A single process tracec. All of the aboved. The interleaving of the process tracesFeedback:We can characterize behavior of the processor by showing how the traces of the various processes are interleaved. P81Question2The Process Image element that contains the modifiable part of the user space is called the:选择一个答案a. User Programb. None of the abovec. System Stackd. Process Control BlockFeedback:User data.Question3The processor execution mode that user programs typically execute in is referred to as:选择一个答案a. System modeb. None of the abovec. User moded. Kernel modeFeedback:用户态。System mode = kernel modeQuestion4One step in the procedure for creating a new process involves:选择一个答案a. Assigning a unique identifierb. All of the abovec. Allocating space for the processd. Initializing the process control blockFeedback：P99 12345Question5A process switch may occur when the system encounters an interrupt condition, such as that generated by a:选择一个答案a. All of the aboveb. Trapc. Supervisor calld. Memory faultFeedback：中断：时钟中断、I/O 中断、内存失效陷阱系统调用Question6In the Process Based O/S:选择一个答案a. None of the aboveb. Major kernel functions are organized as separate functionsc. The User Process Image includes a kernel stackd. O/S code and data are contained in the shared address spaceFeedback：主要的内核函数被组织成独立的进程 P103Question7In a typical UNIX system, the element of the process image that contains the processor status information is the:选择一个答案a. All of