英文试卷-俱乐部
《unix操作系统设计》英文版习题答案1
S.1 Uni x Internals (Apri l/May-2012, Set-1) JNTU-Anantapur B.T ech. III-Year II-Sem.( JNTU-Anantapur) Code No.: 9A05602/R09 B.Tech. III Year II Semester Regular Examinations April/May - 2012UNIX INTERNALS ( Computer Science and Engineering ) Time: 3 Hours Max. Marks: 70 Answer any FIVE Questions All Questions carry equal marks - - -1. (a)Draw and explain the architecture of UNIX systems. (Unit-I, Topic No. 1.5.1)(b)Discuss in detail the sleep and wakeup procedures. (Unit-V, Topic No. 5.6) 2. (a) If several processes contend for a buffer, the kernel guarantees that none of them sleep forever, but it does not guarantee that a process will not be starved out from use of a buffer. Redesign getblk so that a process is guaranteed eventual use of a buffer. (Unit-II, Topic No. 2.2)(b)What are the advantages of buffer cache? (Unit-II, Topic No. 2.5) 3. (a)Give brief description about the accessing of inodes. (Unit-III, Topic No. 3.1)(b)Explain in detail the continuous file allocation system. (Unit-III, Topic No. 3.7) 4. (a)What is the purpose of link system call? Write and explain the algorithm for the same. (Unit-IV, Topic No. 4.12)(b)Write short notes on maintenance of the file system. (Unit-IV, Topic No. 4.15)5. (a)What are regions? Explain their role in the creation of processes. (Unit-V, Topic No. 5.2)(b)Describe in detail about the context of a process. (Unit-V, Topic No. 5.3) 6. (a)Explain the security problems that exists if a setuid program is not write protected. (Unit-VI, Topic No. 6.6)(b)Write a program that a parent and child shares a file access. (Unit-VI, Topic No. 6.1)7. (a)Discuss in detail about the scheduling parameters. (Unit-VII, Topic No. 7.1)(b)What is profiling? Explain it in detail. (Unit-VII, Topic No. 7.3)8. (a)Explain clists in detail. (Unit-VIII, Topic No. 8.3) (b) Write a program for reading data from risk by using block and raw interfaces. (Unit-VIII, Topic No. 8.3)
(完整版)操作系统课程英文词汇
操作系统课程英文词汇____郭冀生 1.操作系统Operating System 2.计算机Computer 3.内核映像Core Image 4.超级用户Super-user 5.进程Process 6.线程Threads 7.输入/输出I/O (Input/Output) 8.多处理器操作系统Multiprocessor Operating Systems 9.个人计算机操作系统Personal Computer Operating Systems 10.实时操作系统Real-Time Operating Systems 11.处理机Processor 12.内存Memory 13.进程间通信Interprocess Communication 14.输入/输出设备I/O Devices 15.总线Buses 16.死锁Deadlock 17.内存管理Memory Management 18.输入/输出Input/Output 19.文件Files 20.文件系统File System 21.文件扩展名File Extension 22.顺序存取Sequential Access 23.随机存取文件Random Access File 24.文件属性Attribute 25.绝对路径Absolute Path 26.相对路径Relative Path 27.安全Security 28.系统调用System Calls 29.操作系统结构Operating System Structure 30.层次系统Layered Systems 31.虚拟机Virtual Machines 32.客户/服务器模式Client/Server Mode 33.线程Threads 34.调度激活Scheduler Activations 35.信号量Semaphores 36.二进制信号量Binary Semaphore 37.互斥Mutexes 38.互斥Mutual Exclusion 39.优先级Priority 40.监控程序Monitors 41.管程Monitor 42.管道Pipe 43.临界区Critical Section 44.忙等待Busy Waiting 45.原子操作Atomic Action 46.同步Synchronization 47.调度算法Scheduling Algorithm 48.剥夺调度Preemptive Scheduling 49.非剥夺调度Nonpreemptive Scheduling 50.硬实时Hard Real Time 51.软实时Soft Real Time 52.调度机制Scheduling Mechanism 53.调度策略Scheduling Policy 54.任务Task 55.设备驱动程序Device Driver 56.内存管理器Memory Manager 57.引导程序Bootstrap 58.时间片Quantum 59.进程切换Process Switch 60.上下文切换Context Switch 61.重定位Relocation 62.位示图Bitmaps 63.链表Linked List 64.虚拟存储器Virtual Memory 65.页Page 66.页面Page Frame 67.页面Page Frame 68.修改Modify 69.访问Reference 70.联想存储器Associative Memory 71.命中率Hit Ration 72.消息传递Message Passing 73.目录Directory 74.设备文件Special File 75.块设备文件Block Special File 76.字符设备文件Character Special File 77.字符设备Character Device 78.块设备Block Device 79.纠错码Error-Correcting Code 80.直接内存存取Direct Memory Access 81.统一命名法Uniform Naming 82.可剥夺资源Preemptable Resource 83.不可剥夺资源Nonpreemptable Resource 84.先来先服务First-Come First-Served
操作系统英文版课后习题答案整理
1.1What are the three main purposes of an operating system? (1) Interface between the hardware and user; (2) manage the resource of hardware and software; (3) abstraction of resource; 1.2 List the four steps that are necessary to run a program on a completely dedicated machine. Preprocessing > Processing > Linking > Executing. 1.6 Define the essential properties of the following types of operating systems: a. Batch b. Interactive c. Time sharing d. Real time e. Network f. Distributed
1.7 We have stressed the need for an operating system to make efficient use of the computing hardware. When is it appropriate for the operating system to forsake this principle and to“waste” resources? Why is such a system not really wasteful? 2.2 How does the distinction between monitor mode and user mode function as a rudimentary form of protection (security) system? 2.3 What are the differences between a trap and an interrupt? What is the use of each function? 2.5 Which of the following instructions should be privileged? a. Set value of timer. b. Read the clock. c. Clear memory. d. Turn off interrupts. e. Switch from user to monitor mode.
操作系统习题(英文版)
Chapter 1 – Computer Systems Overview True / False Questions: 1.T / F – The operating system acts as an interface between the computer hardware and the human user. 2.T / F –One of the processor’s main functions is to exchange data with memory. 3.T / F – User-visible registers are typically accessible to system programs but are not typically available to application programs. 4.T / F – Data registers are general purpose in nature, but may be restricted to specific tasks such as performing floating-point operations. 5.T / F – The Program Status Word contains status information in the form of condition codes, which are bits typically set by the programmer as a result of program operation. 6.T / F – The processing required for a single instruction on a typical computer system is called the Execute Cycle. 7.T / F – A fetched instruction is normally loaded into the Instruction Register (IR). 8.T / F – An interrupt is a mechanism used by system modules to signal the processor that normal processing should be temporarily suspended. 9.T / F – To accommodate interrupts, an extra fetch cycle is added to the instruction cycle. 10.T / F – The minimum information that must be saved before the processor transfers control to the interrupt handler routine is the program status word (PSW) and the location of the current instruction.
操作系统的中英文对照
第八章08软件工程一班裴晓禹虚拟内存：virtual memory 1：硬件和控制结构：hardware and control structures 1：一个进程可以被换入或换出主存，使得进程在执行过程中的不同时刻占据不同的区域。进程中所 有的存储器访问都是逻辑地址，这些逻辑地址在运行时动态地被转换成物理地址。 2：一个进程可以划分成许多块，在执行过程中，这些块不需要连续地位于主存中。 3：在进程的执行过程中，该进程的所有页和所有段不需要都在主存中。 2：程序的执行：execution of a program 1：操作系统将一些程序的块带到主存。 2：进程执行中的任何时候都在主存中的部分被定义成进程的常驻集。 3：当处理器需要访问一个不在主存中的逻辑地址，则会产生一个中断，说明产生 了内存访问故障。操作系统将被中断的进程置于阻塞状态，并取得控制。 4：为了能继续执行这个进程,操作系统要把包含引发故障的逻辑地址和进程块取进主存 1：操作系统产生一个磁盘I\O读请求。 2：产生I\O请求后，在执行磁盘I\O，期间操作系统可以分派另一个进程运行。 3：一旦需要的块被取进主存，则产生一个I\O中断，控制被交回操作系统，而 操作系统把由于缺少该块而被阻塞的进程置回到就绪态。
3：分割进程的优点：advantages of breaking up a process 1：在主存中保留多个进程： 1:对任何特定的进程都仅仅装入它的某些块,所以有足够的空间放置更多的进程． 2:在任何时刻这些进程中都能至少有１个处于就绪态，于是处理器得到更有效的利用2：进程可以比主存的全部空间还大。 4：进程的种类：types of memory 1:实存储器real memory： 由于一个进程只能在一个主存中执行，因此这个存储器称作实存储器。 2：虚拟内存virtual memory: 程序员和用户通常感觉到一个更大的内存，通常它被分配到磁盘上，称作虚拟内存。 虚存允许更有效的多道程序设计，并解除了用户与主存之间没有必要地紧密约束。 5：系统抖动（颠簸）：thrashing 1：当操作系统读取一块时，它必须把另一块扔出。 2：处理器的大部分时间都用于交换块，而不是执行指令。 6：局部性原理：principle of locality 1:局部性原理描述了一个进程中程序和数据应用的集簇现象。 2：很短的时间内仅需要访问进程的一部分块是合理的。 3：可以对在不远的将来可能会访问的块进行猜测。 4：虚拟内存比较实用而且有效。
操作系统英文版
Introduction to Operating Systems (Spring 2001) Final Exam Solutions Note: There are 17 questions, one of which is extra credit. Each question is worth 10 points. 1. Early Intel processors such as the 8086 did not support dual-mode operation (user and supervisor modes). This had a fairly major impact on the type of system that could be implemented on these processors, and most did not support multi-user operation. Discuss a few potential problems that could arise in trying to support multi-user operation on such a system. There are many problems with multi-user operation on such a system. In effect, everything that we protect in modern operation systems is unprotected. This means that: ?Memory is unprotected. A process could read or overwrite another process memory. A process could also read or overwrite the kernel's memory. ?Timers are unprotected. A process could change the timers arbitrarily and mess up other processes execution or run as long as it wanted. ?Devices are unprotected. A process could arbitrarily access devices, messing up permanent storage, interfering with other processes' use of the devices, etc. ?Special instructions are unprotected. Any process could halt the machine or cause other problematic operations to execute. ?Etc. 2. What are the differences between traps and interrupts? What is the use of each? Traps and interrupts are both methods for calling operating system functions by non-operating system entities. The difference is what entity does the
操作系统第八章的中英文对照
第八章 虚拟内存：virtual memory 1：硬件和控制结构：hardware and control structures 08软件工程一班裴晓禹 1：一个进程可以被换入或换出主存，使得进程在执行过程中的不同时刻占据不同的区域。进程中所有的存储器访问都是逻辑地址，这些逻辑地址在运行时动态地被转换成物理地址。 2：一个进程可以划分成许多块，在执行过程中，这些块不需要连续地位于主存中。 3：在进程的执行过程中，该进程的所有页和所有段不需要都在主存中。 2：程序的执行：execution of a program 1：操作系统将一些程序的块带到主存。 2：进程执行中的任何时候都在主存中的部分被定义成进程的常驻集。 3：当处理器需要访问一个不在主存中的逻辑地址，则会产生一个中断，说明产生 了内存访问故障。操作系统将被中断的进程置于阻塞状态，并取得控制。 4：为了能继续执行这个进程,操作系统要把包含引发故障的逻辑地址和进程块取进主存1：操作系统产生一个磁盘I\O读请求。 2：产生I\O请求后，在执行磁盘I\O，期间操作系统可以分派另一个进程运行。 3：一旦需要的块被取进主存，则产生一个I\O中断，控制被交回操作系统，而 操作系统把由于缺少该块而被阻塞的进程置回到就绪态。
3：分割进程的优点：advantages of breaking up a process 1：在主存中保留多个进程： 1:对任何特定的进程都仅仅装入它的某些块,所以有足够的空间放置更多的进程．2:在任何时刻这些进程中都能至少有１个处于就绪态，于是处理器得到更有效的利用2：进程可以比主存的全部空间还大。 4：进程的种类：types of memory 1:实存储器real memory： 由于一个进程只能在一个主存中执行，因此这个存储器称作实存储器。 2：虚拟内存virtual memory: 程序员和用户通常感觉到一个更大的内存，通常它被分配到磁盘上，称作虚拟内存。 虚存允许更有效的多道程序设计，并解除了用户与主存之间没有必要地紧密约束。 5：系统抖动（颠簸）：thrashing 1：当操作系统读取一块时，它必须把另一块扔出。 2：处理器的大部分时间都用于交换块，而不是执行指令。 6：局部性原理：principle of locality 1:局部性原理描述了一个进程中程序和数据应用的集簇现象。 2：很短的时间内仅需要访问进程的一部分块是合理的。 3：可以对在不远的将来可能会访问的块进行猜测。 4：虚拟内存比较实用而且有效。
操作系统中英文界面
一、功能 操作系统中/英文界面，具有精子密度和活动力分析，精子形态分析功能。二、配置 研究级相差显微镜，显微镜加热物台，CCD，19′LCD电脑，彩色激光打印机。 三、参数 1．光学系统：研究级相差显微镜，含1xCCD接口，5倍平场消色差物镜、10倍、20倍、40倍、100倍平场消色差相差物镜；蓝色、绿色滤光片；5孔转盘式明场、暗场、相差聚光器，NA1.25；10×超宽视域目镜，视场数22。调焦旋钮可以上下移动，载物台操纵杆可以左右可以互换。 2．图像采集：高分辨率彩色摄像头，步进扫描式CCD，分析画面速度1-50帧/秒。可采集多种不同的计数池如Makler、Microcell、普通玻片等。 3．分析系统： 3．1精子密度、活力分析模块： 采用正相差分析原理，10倍显微镜镜头，单视野捕获帧幅1-100帧，单视野可捕获分析＞1000条精子，采集时间＜4秒/每视野。 可进行密度，活动力，精子动力学参数检测分析。 具有单条精子运动轨迹分析功能。 3．2精子形态分析模块： 可选择WHO（世界卫生组织）人类精子形态标准，Kruger标准（Strict Criteria）实现对Diff-Quik染色精子图片自动形态分析，也可根据用户自定义的各项分析参数进行分析，分析系统必须具有智能地自动捕获所选视野中所有染色精子图像，不需手动逐次锁定每个精子图像来分析染色精子图像。 3．3 质控功能： 实时视野图像连续回播，精子密度分析质量控制，系统自动得出质控表。提供精子形态外部质控玻片分析对照。 3．4图像存贮和报告输出、数据库功能： 储存原始视频动态及静态图像，数据库具有强大的统计，检索，查询功能。
完整版电脑主板BIOS英文版的中英文对照翻译
电脑主板BIOS 英文版的中英文对照翻译 让你的电脑BIOS知识迅速提高滴。Time/System Time 时间/系统时间 Date/System Date 日期/系统日期 Level 2 Cache 二级缓存 System Memory 系统内存 Video Controller 视频控制器 Panel Type 液晶屏型号 Audio Controller 音频控制器Modem Controller 调制解调器（Modem） Primary Hard Drive 主硬盘Modular Bay 模块托架Service Tag 服务标签 Asset Tag 资产标签 BIOS Version BIOS 版本 Boot Order/Boot Sequence 启动顺序（系统搜索操作系统文件的顺序） Diskette Drive 软盘驱动器Internal HDD 内置硬盘驱动器Floppy device 软驱设备Hard-Disk Drive 硬盘驱动器 USB Storage Device USB 存储设备 CD/DVD/CD-RW Drive 光驱
CD-ROM device 光驱 Modular Bay HDD 模块化硬盘驱动器 Cardbus NIC Cardbus 总线网卡 Onboard NIC 板载网卡 Boot POST进行开机自检时(POST)硬件检查的水平：设置为 'MINIMAL'(默认设置)则开机自检仅在BIOS升级， 内存模块更改或前一次开机自检未完成的情况下才进行检查。设置为'THOROUGH' 则开机自检时执行全套硬件检查。Config Warnings 警告设置：该选项用来设置在系统使用较低电压的电源适配器或其他不支持的配置时是否报警，设置为'DISABLED'禁用报警，设置为'ENABLED'启用报警Internal Modem 内置调制解调器：使用该选项可启用或禁用内置Modem 。禁用( disabled )后Modem 在操作系统中不可见。 LAN Controller 网络控制器：使用该选项可启用或禁用PCI 以太网控制器。禁用后该设备在操作系统中不可见。 PXE BIS Policy/PXE BIS Default Policy PXE BIS策略：该选项控制系统在没有认证时如何处理(启动整体服务Boot Integrity Services(BIS)) 授权请求。系统可以接受或拒绝BIS请求。设置为'Reset'时，在下次启动计算机时BIS将重新初始化并设置为'Deny'。 Onboard Bluetooth 板载蓝牙设备
操作系统英文版课后习题答案整理word文档良心出品
l.lWhat are the three main purpo ses of an op erat ing system? ⑴ In terface betwee n the hardware and user; (2) man age the resource of hardware and software; (3) abstracti on of resource; Answer: ? To provide an environment k>r a computer user to< execute programs on computtr hardware in a ccnvenient and efficient manner ? Tb 吕 lk>cat 特 the 艺t?parattz resources of the compuler as nteded to strive the prtjblem given* The allocation p TOCESS should be as fair and efficient as possible. ? Asa ct>ntroJ p a>gram it serves two major functions ： (1) sup ervision of the execution of user programs to p re vent errors and improper use of the computer, and (2) manage ment of the ?p erat it) JI and control of [/O devices. 1.2 List the four steps that are necessary to run a program on a completely dedicated machine. Prep rocess ing > Process ing > Linking > Executi ng. Answer 乩 Reserve machine time* b. Manually load program into memory. c. Load starting address and begin execution. d. Monitor and control execution of program fnim ct>nsoie. 1.6 Define the esse ntial prop erties of the follow ing types of op erat ing systems: a. Batch b. In teractive c. Time shari ng d. Real time e. Network f. Distributed Answer Batch. Jobs with similar needs are batched together and run through the computer as a grcup by an operator or automatic job st^quencer.[咆jrformHrk ：电 is increased by atteiTipting to keep CPU and I/O devices busv 試 all times through off-line operation, Kptx?ling, and multiprogramming* Batch is good for executing large jobs that netxl interaction; it can be siubmilted and picked up later Interactive. Thk in J of many short transactiorifd where the results of the next transaction may be unpredictable. Response rirne needs to be short (seconds] since the user submils and w^iih For the result. Time sharing. This systems u&es 匚n scheduling and mLiltiprt)gramming toprtividt* economical interactive of a system. The CP 匚 占w 让 chem rap idly fn>nn one user to another Instead of having a jo b defined by spooled card images^ each program re^ds a” b. c.
操作系统全英文期末考试题
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 programming language complier 2.The main disadvantage of batch system is ( C ) A.CPU utilization is low B.Can not concurrent https://www.wendangku.net/doc/124526717.html,ck of interaction D.Low degree of automation 3.A process transforms from waiting state to ready state is caused by the ( B ) A.Interrupt event B.Process scheduling C.Create a process for a program D.Waiting for some events 4.The concurrent process is refers to ( C ) A.The process can be run in parallel B.The process can be run in order C.The process can be run in the same time D.The 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 C.Synchronization mechanism D.A program 6.The orderly use of resources allocation strategy can destroy the condition ( D ) to avoid deadlock. A.Mutual exclusive B.Hold and wait C.No preemption D.Circular wait https://www.wendangku.net/doc/124526717.html,er's applications use the system resources to complete its
(完整版)电脑主板BIOS英文版的中英文对照翻译
电脑主板BIOS英文版的中英文对照翻译 让你的电脑BIOS知识迅速提高滴。Time/System Time 时间/系统时间 Date/System Date 日期/系统日期 Level 2 Cache 二级缓存 System Memory 系统内存 Video Controller 视频控制器 Panel Type 液晶屏型号 Audio Controller 音频控制器 Modem Controller 调制解调器（Modem) Primary Hard Drive 主硬盘 Modular Bay 模块托架 Service Tag 服务标签 Asset Tag 资产标签 BIOS Version BIOS版本 Boot Order/Boot Sequence 启动顺序（系统搜索操作系统文件的顺序） Diskette Drive 软盘驱动器 Internal HDD 内置硬盘驱动器 Floppy device 软驱设备 Hard-Disk Drive 硬盘驱动器
USB Storage Device USB存储设备 CD/DVD/CD-RW Drive 光驱 CD-ROM device 光驱 Modular Bay HDD 模块化硬盘驱动器 Cardbus NIC Cardbus总线网卡 Onboard NIC 板载网卡 Boot POST 进行开机自检时（POST）硬件检查的水平：设置为'MINIMAL'（默认设置）则开机自检仅在BIOS升级，内存模块更改或前一次开机自检未完成的情况下才进行检查。设置为'THOROUGH'则开机自检时执行全套硬件检查。Config Warnings 警告设置：该选项用来设置在系统使用较低电压的电源适配器或其他不支持的配置时是否报警，设置为'DISABLED'禁用报警，设置为'ENABLED'启用报警Internal Modem 内置调制解调器：使用该选项可启用或禁用内置Modem。禁用（disabled）后Modem在操作系统中不可见。 LAN Controller 网络控制器：使用该选项可启用或禁用PCI 以太网控制器。禁用后该设备在操作系统中不可见。 PXE BIS Policy/PXE BIS Default Policy PXE BIS策略：该选项控制系统在没有认证时如何处理（启动整体服务Boot Integrity Services(BIS))授权请求。系统可以接受或拒绝BIS请求。设置为'Reset'时，在下次启动计算
计算机操作系统英文论文
Introduction to the operating system of the new technology Abstract:the Operating System (Operating System, referred to as OS) is an important part of a computer System is an important part of the System software, it is responsible for managing the hardware and software resources of the computer System and the working process of the entire computer coordination between System components, systems and between users and the relationship between the user and the user. With the appearance of new technology of the operating system functions on the rise. Operating system as a standard suite must satisfy the needs of users as much as possible, so the system is expanding, function of increasing, and gradually formed from the development tools to system tools and applications of a platform environment. To meet the needs of users. In this paper, in view of the operating system in the core position in the development of computer and technological change has made an analysis of the function of computer operating system, development and classification of simple analysis and elaboration Key words: computer operating system, development,new technology Operating system is to manage all the computer system hardware resources include software and data resources; Control program is running; Improve the man-machine interface; Provide support for other application software, etc., all the computer system resources to maximize the role, to provide users with convenient, efficient, friendly service interface. The operating system is a management computer hardware and software resources program, is also the kernel of the computer system and the cornerstone. Operating system have such as management and configuration memory, decided to system resources supply and demand of priorities, control input and output devices, file system and other basic network operation and management affairs. Operating system is to manage all the computer system hardware resources include software and data resources; Control program is running; Improve the man-machine interface; Provide support for other application software, etc., all the computer system resources to maximize the role, to provide users with convenient, efficient, friendly service interface. Operating system is a huge management control procedures, including roughly five aspects of management functions, processes and processor management, operation management, storage management, equipment management, file management. At present the common operating system on microcomputer DOS, OS / 2, UNIX, XENIX, LINUX, Windows, Netware, etc. But all of the operating system with concurrency, sharing, four basic characteristics of virtual property and uncertainty. At present there are many different kinds of operating system, it is difficult to use a single standard unified classification. Divided according to the application field, can be divided into the desktop operating system, server operating system, the host operating system, embedded operating system. 1．The basic introduction of the operating system （1）The features of the operating system Management of computer system hardware, software, data and other resources, as