2000年9月全國計算機(jī)等級考試四級筆試試題-全文預(yù)覽
【正文】 normally used to point outA) Programmed execution instructionB) The address of last execution instructionC) The address of current execution instructionD) The address of next execution instructionItems (58) and (59) are based on the following Pascal code.FOR i:=1 TO n –1 doBEGIN k:=i: FOR j:=i+1 TO n DO IF A[j]A[k] THEN k:=j: IF ki THEN BEGIN X:=A[k]。 Cost analysis of software developmentⅢ.Adjustment of software development progressA) Ⅲ only B) Ⅱ and Ⅲ C) Ⅰ and Ⅱ D) all(63) Prototype method is one of the software engineering methods frequently used, which of the following item is the necessary condition for implementing prototype method?Ⅰ.Can acquire the user requirement quicklyⅡ.Have the tools for building software fastⅢ.Have a certain accumulation of prototype systemsA) Ⅰ only B) Ⅰand Ⅱ C) Ⅱ and Ⅲ D) all(64) ORACLE RDBMS is a distributed DBMS. Which of the following techniques adapted ensure atomicity of distributed transaction?A) remote procedure call (RPC) B) Two _phases mit (2PC)C) Snapshots D) triggers(65) In order to get names of schoolboys(SEX=‘M’)whose age=22, from a relation S(SNO,SNAME,SEX,AGE),which of the following expressions is (are) correct?Ⅰ.πsname(σsex=’M’^age=22(S))Ⅱ.σsex=’M’^age=22(πsname(S))A) Ⅰ only B) Ⅱ only C) Ⅰand Ⅱ D) neither(66) In order to improve the performance of a network server, you need to select bus or local bus. The appropriate local bus isA) VESA B) PCI C) EISA D) ISA(67) In terms of ’s taxonomy, the systolic array falls intoA) SISD B) MIMD C) SIMD D) MISD(68) In the WAN, when a pointtopoint subnet is used, an important design issue is the roucer interconnectionA) topology B) puter C) service D) lines(69) In the Ethernet LAN, an algorithm was chosen to dynarnically adapt to the number of stations trying to send. It is calledA) backward learning B) binary exponential backoffC) spanning tree D) CRC(70) The typical firewall consists of two packet filters and a (an)A) router B) bridge C) application D) server二、論述題 (四個論述題可任選其一，并只選其一，多選無效,滿分30分)論述題 1設(shè)計一個用于管理會議室的數(shù)據(jù)庫。l 當(dāng)前房間狀態(tài)取值為‘1’表示該會議室當(dāng)前正在開會，取值為‘0’表示該會議室當(dāng)前未被借用。（8分）⒊ 實(shí)施快速原型法的前提和條件。試根據(jù)你對IP協(xié)議的理解，討論以下問題：⑴ 論點(diǎn)1：Internet中沒有兩臺或兩臺以上的主機(jī)或路由器可以同時使用同
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