计算机英语选择题._计算机英语选择题

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(1 A large main memory can be used for storing a,b,c.a.data b.operating system c.applications d.interface(2 Early computer solved c,d problems.a.control b.busine applications c.engineering d.mathematical(3 The system manager used by a fast proceor can a,b,c.a.reset a system b.monitor proceor’s core temperature c.monito r proceor’s supply voltages d.connect a network(4 We can say a bus is simply a,c,d.a.a group of wires

b.a wire c.a 8-bit bus d.a 16-bit bus(5 A computer system user generally more cares for b,c,d.a.physical size of the computer b.storage size c.speed of computation d.efficiency of the computer(6 According to the physical size of computers we can claify the computers into a,b,c,d.a.microcomputer b.minicomputer c.mainframe d.supercomputer(7 The basic hardware components of any computer include a,b,c,d.a.CPU b.main memory c.input devices

d.output devices(8 The following devices are belong to the ma storages a,b,d.a.DVD b.CD-ROM c.mouse d.disk(1 Cache is a,c,d.a.fast b.slow c.relatively small d.high cost(2 Information stored in semiconductor RAM is b,c.a.permanent b.nonpermanent c.volatile d.non volatile(3 We use paged virtual memory to a,b,c,d.a.extend the size of memory b.increase bandwidth of the disk c.reduce latency of the disk d.store large program and data set(4We read data on the disk by a,d.(5 The three desiderata of memory system are b,c.a.independent b.exclusive c.closely approximated today d.Le approximated tomorrow(6 The proceor performance would be high as we reference instructions and data from b,d.a.hard disk b.cache c.floppy disk d.memory(7 Page frame is used in a.a.real memory

b.virtual memory c.disk d.cache(8 In order to increase our computer’s performance we need to a,b,c , a.have a L2 cache b.buy a L2 cache c.have a much larger main memory d.buy a L1 cache(1 RISC is b,c,d.a.abbreviation of complex instruction set computer b.abbreviation of reduced instruction set computer c.guided to be built from studying the execution behavior of high-level language programs d.used for many computer manufacturers nowadays(2 To enhance performance of a computer system we should a,b,d.a.improve the pattern of referencing operand

b.optimize the simple movement of data c.use IF and LOOP instructions as many as poible d.optimize the basic sequence control mechanism(5 Register storage has b,d.a.a large capacity b.a small capacity c.the slower speed d.the faster speed(6 Instruction format in RISC has a,c,d.a.one kind b.many kinds c.a few kinds d.one or a few kinds(7 CISC machine instructions compared with RISC machine are a,d.a.more complicated b.more simple c.more faster to be executed

d.more slower to be executed(8 Functions of the compiler used in RISC are b,c,d.a.to compile a high level language program b.to optimize register usage c.to maximize register usage d.to allocate registers to those variables that will be used the most in a given time period(9 One machine cycle in RISC has c.a.two machine instructions b.three machine instructions c.one machine instruction d.four machine instructions(10 The register file is a,c,d.a.physically small b.physically large

c.one the same chip as the CPU d.addreed by much shorter addrees Operating systems and middleware b,c,d a.have le in common b.both can support other software c.have much in common d.both can support application programs 2.An operating system provides the services in its API by a,c,d a.using the features of the hardware b.offering database acceibility c.using disk drive’s ability

d.offering fixed-length blocks of data 4.Middleware lies in b,c,d a.the top of the layering vertical stack b.the middle of the layering vertical stack c.the top of an operating system d.the middle of interactions between different application programs

5.The following products of software are belong to middleware a,b,c a.IBM’s Web Sphere MQ b.Java 2 Platform c.J2EE d.Oracle 6.A mechanism for translating Internet hostnames into IP addrees is a,c,d a.typically outside of operating system kernel b.typically inside of operating system kernel c.equipped into the general-purpose operating system d.as a middleware by author’s definition 7.With middleware we can b,c,d a.run programs on a centralized computer system only b.keep computations largely isolated from undesirable interactions c.run programs on different computer system

d.allow computations to communicate with one another 8.Middleware has mechanisms to support controlled interaction through a,b,c,d a.communication b.naming c.persistent storage d.coordination 1.Before you turn the power on with a new computer, you should make sure a,b,c,d.a.the computer is already out of the box b.appropriate cables are correctly connected c.the computer system has been set up d.appropriate software have been installed 2.An asleep state is a,c,d.a.a low power standby mode b.indicated by the indicator light putting out c.used for saving energy

d.used to leen wear-and tear on the computer 4.During the boot procedure we can see a,b,c on the screen.a.amount of memory b.the number of attached devices c.the operating system being used d.beeps and whirling noises 5.A user interface we said here is a,b,d.a.an interaction between an operating system and a user b.an interaction between an application program and a user c.an interface between a computer and its peripheral device d.a text-based user interface or GUI 6.Today Microsoft’s ope rating system Windows has a variety of versions, they are a,b,c,d.a.Windows 2007 b.Windows 2003 c.Windows XP d.Windows vista 7.The Windows desktop contains common elements, such as.a.desktop icons b.taskbar c.Start button d.task button 9.With the window of the GUI we can use.a.menus b.dialog boxes c.icons d.documents 10.Main menu category in some Microsoft programs.a.is a menu bar at the top of many windows

b.can display a pull-down menus c.can’t display a drop-down menus d.can display personalized menus 1.Upgrading a computer system means.a.buying new hardware b.buying new software c.extending the life of your current system d.keeping your computer in present situation 2.To formulate an upgrade strategy, you should consider.a.the PC adheres to a well-supported standard b.you anticipate all your future needs c.there is room for additional expansion cards d.there is room for memory 3.Some common hardware upgrades nclude.a.adding more RAM b.installing ADSL

c.adding an image scanner d.installing a color printer 4.The ways to seriously upgrade an Intel 80486-based PC include.a.installing the most modern software b.replacing the motherboard c.replacing other items inside the system unit d.just purchasing a new PC 5.Relationship between version and release in a software is.a.version has major number b.release has minor number c.version typically increase its number in increments of 1 d.release typically increase its number in increments of 0.1 or 0.01 6.Compatible mode of the software products can be categorized into.a.upward

b.downward c.cro d.above all 1.A Wide Area Network can..a.cover a wide geographical area b.link two or more LANs c.link two LANs only d.be created by individual users 2.According to the flow of information on a transmiion facility we can categorize WAN into network.a.circuit switched b.packet switched c.local area d.Lease d.line 3.In packet switched networks data send in..a.byte

b.pieces c.frame d.packet 4.The most important items contained in a packet should be.a.data to be transmitted b.header of the packet c.tail of the packet d.date 5.The popular approaches we used in the packet switched network are.a.circuit switching b.datagram c.virtual circuit d.real circuit 6.In the datagram mode when datagrams arrive at their destination, the datagrams.a.may be out of order b.must be in order

c.should be reordered d.may lose 7.In the virtual circuit mode all packets sent by a user at a time belong to.a.a meage b.a seion c.different meages d.different seions 8.Main characteristics of the leased line networks are.a.the line is private for the user b.the user has himself inter-exchange c.very short response time d.the user computer is always physically connected to the line 8.Main characteristics of the leased line networks are.a.the line is private for the user b.the user has himself inter-exchange

c.very short response time d.the user computer is always physically connected to the line 9.A typical frame relay network has.a.seven components b.five components c.six components d.five major physical components and one “virtual” components 10.Router has the following name.a.ARPANET b.IMP(Interface Meage Proceor c.gateway d.IS(Intermediate System 11.In Fig.4-6 a router creates a logical path between networks, these networks include.a.FDDI b.Token Bus

c.Token Ring d.Ethernet 12.Encapsulation is used here for data delivering on.a.the circuit switching b.the physical path c.the analog circuit d.the logical path 1.Connecting to the Internet usually includes the following decisions type of.a.device b.connection c.user d.Internet service provider 2.Which device can be used to acce the Internet ?.a.PC b.DVD c.notebook computer d.Internet appliance 3.Following device belongs to the one of dial-up connection.a.HFC b.modem c.dedicate line deviced d.ADSL 4.Using a PC we can retrieve much contents from the Web, they are.a.Web pages b.multimedia contents c.video clips d.music files 5.Mobile Web is used for usually.a.notebook computers b.mobile phones

c.handheld computers d.pagers 6.When we use a dial-up connection to acce the Internet, we need.a.a TV cable b.a regular telephone line c.a modem d.a temporary IP addre 7.ADSL works at a rate of.a.asymmetric transmiion b.symmetric transmiion c.asymmetric transmiion with 9Mb/s downstream d.asymmetric transmiion with 16K-64Kb/s upstream 8.We can find the following facilities in an HFC system.a.optical fiber b.coaxial cable c.cable modem d.head end 9.With the dedicated connection to connect the Internet we should.a.use dial-up connection b.keep a continual connection c.use a static IP addre d.keep a temporary connection 10.If some one wants to use mobile wirele connection, he or her should have.a.mobile device b.a fixed radio connection c.Web-enable cell phone d.a mobile transceiver(1 The true goal of ERP is.a.to integrate all departments b.to integrate all functions c.to work acro a company d.d.to work on a single computer system(2 To do ERP right the ways should change.a.people do their jobs b.you do busine with ERP c.you do busine without ERP d.people do their jobs with ERP(3 ERP can serve the needs of people in.a.finance b.human resources c.warehouse d.all above(4 Real transformational ERP efforts usually run.a.five years b.three years c.two years d.one year(5 A busine proce should include.a.order fulfillment b.shipping goods c.billing for the order d.understanding the customer’s credit rating(6 Companies that measure their products by flow rather than individual units are companies.a.utility b.oil c.chemical d.mechanical parts(7 With ERP, the customer service representatives.a.are just typists b.are no longer just typists c.should be busine people d.should not be busine people(8 With the manufacturing companies can save time, increase productivity and reduce headcount.a.standardizing manufacturing procees b.using a single, integrated computer system c.using ERP d.in-basket mode 1.Internet telephony system are systems.a.synchronous distributed b.asynchronous distributed c.so called as IP telephony d.synchronous centralized 2.The operating platforms that are currently

supported by the various Internet telephony system include.a.QoS b.UNIX c.Windows d.Mac 3.With an Internet telephone system developed by using Java applet users should.a.have a standard web browser with Java support b.install the telephony system every time they want to talk c.worry about the underlying workings of a telephony system d.have a network connection 4.The following components are the basic ones of an Internet telephony system.a.host computer b.modem c.local area network

d.router 5.The communication proce that the caller’s telephony system handled includes.a.acquiring the real-time voice data b.digitizing the analogue signals c.compreing the digitized data d.decrypting the digitized data 6.The communication proce that the recipient’s telephony system handled includes.a.encrypting the digitized data b.receiving incoming data c.decompreing incoming data d.playing back on the audio output device 7.The major problems encountered in the current Internet telephone are.a.the working model of the best-effort Internet b.transmitting delay c.transmitting delay jitters d.packet lo

8.We can find the following voice recovery methods.a.silence substitution b.waveform substitution c.sample interpolation d.embedded speech coding 9.When we make a distance telephony call such as from Beijing to Guangzhou with Internet telephony system, we should pay communication fees that include.a.transcontinental telephone calls b.local telephone calls c.ISP’s fees

d.nominal standard Internet connectivity charges 10.The current Internet telephony systems.a.are launched as stand-alone applications b.must be downloaded prior to operation c.must purchase a new version of the

software of the system for upgrading d.must be installed prior to operation 1.The Web took a bold step forward, it.a.was spurred by little-known technologies b.was spurred by well-known technologies c.shattered the traditional usage model of the Web d.kept the traditional usage model of the Web 2.In order to develop a new web application model we should use some technologies, such as.a.traditional web browsers b.JavaScript remoting c.web remote procedure calls d.dynamic updating 3.Using Ajax we can.a.perform the web interaction b.transmit only a small amount of information

to and from the server c.give the user the most responsive experience poible d.substitute the traditional web application model 4.In the traditional web application model the browser.a.has an Ajax engine b.is responsible for initiating requests to the Web server c.is responsible for proceing requests from the Web server d.sends a HTML request to the Web server 5.Ajax engine is.a.a JavaScript object b.a JavaScript function c.responsible for linking to another resource d.responsible for executing the request from the Web server

6.The traditional Web server would serve up.a.JavaScript b.CSS c.HTML d.images 7.After receiving a server response the Ajax engine.a.goes into action b.provides a link to another Web page c.often parses the data d.makes several changes to the user interface 8.To make an Ajax solution we must use the following technologies:.a.CSS b.HTML/XHTML c.DOM d.JavaScript 9.With Ajax engine we can.a.transfer le information than the traditional Web application model b.update user interface more faster c.work more quickly d.transfer more information than the traditional web application model 10.The data that the Ajax engine can use should be.a.plain text b.understood by the Ajax engine c.XML d.any other data format