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數(shù)據(jù)庫系統(tǒng)工程師模擬試題1-文庫吧資料

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【正文】 all munication between an organization’snetwork and the internet conform to the organization’s security policies.(66) A.dependentC.related (67) A.browser C.repeater (68) A.pass C.passing (69) A.localC.private (70) A.mole C.role B.isolatedD.standaloneB.clientD.severB.passedD.passesB.nationalD.publicB.poleD.rule A Web browser is simply a terminal emulator, designed to display text on a screen. The two essential differences between an ordinary terminal emulator and a Web browser are that thebrowser knows how to deal with (71), and that it has a mechanism for (72) graphicalfiles. Display text ,display graphics , and (73) hyperlinks—there’s 99 percent of the (74)value. That’s not to say that the manufacturers didn’t go allout to attach a hyperactive efflorescence of useless capabilities onto their browsers. Remember when media channels in thebrowser were a big deal, instead of the clutter you can’t wait to delete from your favorites ofbookmarks menu ? Remember when clientside Java applets were supposed to bee thepreferred (75) for application development? Remember frames and all their nasty side effects? (71) A.superlinksC.hyperlinks(72) A.displayingC.drawing (73) A.directC.indicate (74) A.Web browser’s C.emulator’s (75) A.planeC.plate下午部分試題一(15 分)B.linksD.connectionsB.illustratingD.writingB.navigateD.goonB.terminal’sD.network’sB.plantD.platform設有關系模式 R(A,B,C,D,E),其函數(shù)依賴集為 F={AB→C,C→D,BD→A,BC→E}(1) 求 R 的候選碼,并簡要說明理由。從第二圈開始,一個新產(chǎn)品開發(fā)項目開始了,新產(chǎn)品的演化沿著螺旋線進行若干次迭代,一直運轉(zhuǎn)到軟件生命期結束。采用螺旋模型時,軟件開發(fā)沿著螺線自內(nèi)向外旋轉(zhuǎn),每轉(zhuǎn)一圈都要對(63)進行識別、分析,并采取相應的對策。(60)A.關鍵實踐B.軟件過程性能C.軟件過程能力D.軟件過程(61)意味著一個操作在不同的類中可以有不同的實現(xiàn)方式。(56) A.1:1 和 1:nC.1:n 和 m:n(57) A.聯(lián)系模式 C.數(shù)據(jù)模式 (58) A.聯(lián)系的屬性C.關系的碼 B.1:1 和 m:nD.1:1:n 和 m:nB.邏輯模式D.關系模式B.關系的屬性D.邏輯模式的屬性(59) A.任一實體的碼 B.各實體碼的組合C.任一實體的碼和聯(lián)系屬性組合 D.聯(lián)系的屬性CMM 提供了一個框架,將軟件過程改進的進化步驟組織成 5 個成熟度等級。一個多對多的聯(lián)系只能轉(zhuǎn)換成一個獨立的關系模式。實體間聯(lián)系可以是(56)。A.后援副本B.后備副本C.日志文件D.系統(tǒng)文件二級封鎖協(xié)議解決了事務的并發(fā)操作帶來的(52)不一致性的問題。 (∏,(σ( ))1 3的結果為(48) 。若將 R 分解為關系模式組 R1(C,P),R2(S,C,G),R3(S,T,W,C),則 R1,R2,R3 的規(guī)范化程度最高分別可達到(45) ,(46) ,(47) 。(40) A.3MC.300KB.96K D.30K 已知關系 R 如下所示,關系 R 的主屬性為(41) ,候選碼為(42) 。(34) A.247B.248 C.249D.250算術表達式((a+b)*cd)/e 的逆波蘭表達式為(35)(35) A./*+abcdeC.a(chǎn)b+*cde/B.a(chǎn)b+c*de/D. +*/abcde設有鍵值序列{18,7,6,24,38,56,3,22,47,36},按鍵值遞增順序采用選擇排序,第一趟掃描的結果應為(36)(36) A.{3,7,6,24,38,56,18,22,47,36}B.{7,6,18,24,38,3,22,47,36,56}C.{56,7,6,24,38,18,3,22,47,36}D.{18,3,6,24,36,56,7,22,47,38}一棵二叉樹的前序遍歷序列為
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