歷年計(jì)算機(jī)等級(jí)考試四級(jí)三-計(jì)算機(jī)等級(jí)真題-計(jì)算機(jī)等(編輯修改稿)
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【文章內(nèi)容簡介】 它(2分) A)要求用戶直接將遠(yuǎn)地文件全部拷貝到本地文件系統(tǒng) B)允許多個(gè)遠(yuǎn)地程序同時(shí)訪問單個(gè)文件，在原文件上進(jìn)行操作，而沒有文件拷貝過程 C)要求本地用戶連入局域網(wǎng)中 D)要求用戶通過電子郵件方式交換信息 (59)ATM是一種面向連接的快速分組交換技術(shù)，它采用虛擬通道模式，通道標(biāo)識(shí)基于兩種標(biāo)識(shí)符 A)(N)PDU、(N)IDU B)VPI、VCI C)、 D)(N)SAP、(N+1)SAP (60)在ISO“開放系統(tǒng)互連管理框架”中，將網(wǎng)絡(luò)系統(tǒng)管理劃分為五個(gè)功能域。這五個(gè)功能域是:配置管理、故障管理、安全管理、性能管理與 A)設(shè)備管理 B)用戶注冊(cè)管理 C)計(jì)費(fèi)管理 D)域名管理 (61)Whatisthedecimalvalueofthefollowing32bittwo’splementnumber? 1111111111111111111111111100 A)8 B)4 C)4 D)8 (62)HowmanysubsetsdoesAhave? LetA={E，O，A，W，P，V，B} A)12 B)36 C)64 D)128 (63)SupposeV1=＜R,+＞，V2=＜R,＞，whereRisthesetofrealnumbres，+，andare respectivelyadditionandmultiplication.Letf:R→Randf（x）=ex，whichofthe followingpropositionsistrue? A)fisasurjectivehomomorphismfromV1toV2 B)fisaninjectivehomomorphismfromV1toV2 C)fisanisomorphismfromV1toV2 D)Noneoftheabove (64)P(n)isthepredicate’if4dividesnthen2dividesn’. WhatisthetruthvalueofP(12)? A)10 B)F C)T D)Noneoftheabove (65)Analgorithmtosolveagivenproblemhastimeplexity T(n)=nlog2n(n1) Giventhatthealgorithmtakessecondforaprobleminwhichn=1024，howlong shouldittakeforaprobleminwhichn=4096?(2Points) A)39seconds B)seconds C)minutes D)seconds (66)WhatisthedefinitionofaPath? A)Asequenceofverticesandtheedgesformedbyeachsuccessivepairofvertices. B)Awalkwithdistinctvertices. C)Awalkwithdistinctedges. D)Noneoftheabove (67)Thefigurebelowshowsarecordusedforrecordinginformationaboutanamedevent. Whichofthefollowingstatementisincorrect?(2Points) VARr:record event:array[1..10]ofchar。 place:array[1..20]ofrecord plname:array[1..15]ofchar。 date:array[1..5]ofrecord mo:1..12。 day:1..31。 year:integer end end end。 A)Thisisaonedimensionalarrayofrecords，alsocalledatable. B)Thisissocalledrecordofarrays。 C)Theeventcanoccurinupto20placesandonupto5differentdates ineachplace. D)Areferenceto[i].date[j].mowillaccessthemonthofthejthoccurrence， intheithplace，oftheeventnamedin. (68)Whichofthefollowingstatementsistrueregardingsimplesorttechniques? (2Points) A)Exchangesortisfrequentlyreferredtoasabubblesort. B)Exchangesortistheleastexpensive C)Ifrandomdataareinanarraythatistobesorted，anInsertionSortwillgive thebestperformanceforlargeelementswithsmallsortitems. D)BothInsertionSortandSelectionSortrequireO(n)moves. (69)WhichUNIXmandcreatesasymboliclinknamedmyfileinthecurrentdirectoryto thefile/etc/hosts? A)Ins/etc/hostsmyfile B)Insmyfile/etc/hosts C)links/etc/hostsmyfile D)linksmyfile/etc/hosts (70)WhichMSDOSmandiscorrect? A)DEL/s*.bat B)DEL*.exe/sp C)DEL*
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