计算机等级考试四级章节习题五

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  (61how many equal valuable relation does set E process?( )。

  

  E {012}

  

  A 3 B 4 C 5 D 6

  

  (62Software Engineering Economy is an effective part of software engineering

  

  which of the following content is the research content of software engineering

  

  economy?( )。

  

  Ⅰ.Estimation of software development cost

  

  Ⅱ.Earn & Cost analysis of software development

  

  Ⅲ.Adjustment of software development progress

  

  A) Ⅲ only B) Ⅱ and C) Ⅰ and D all

  

  (63Which of the following statements is correct?( )。

  

  A The definition phase results in the Software Requirements Specification

  

  B Testing is optional in software life cycle

  

  C CASE tools can only aid in the design phase of a software life cycle

  

  DA change during a later phase does not require the documentation of all

  

  earlier phases to be updated

  

  (64WhatoperationonrelationsR and S produces the relationshown below? ( )。

  

  {tupletupleRtupleS}

  

  A Union B Difference C Intersection DDivision

  

  (65Which values are NOT permitted to be part of the primary key? ( )。

  

  A alphanumeric characters B punctuation

  

  C special characters D NULL

  

  (66There are two styles in the evolution of instruction set that is CISC and

  

  RISC Which chip belongs to the CISC?( )。

  

  A SOAR B VAX11/780 CCDC6600 D IBM RTPC

  

  (67According to the principle of CRC calculation given a framebit series

  

  M11100111 and the multipleterm formula framebit series generated by the

  

  CRC G110011 then the CRC is ( )。

  

  A 111101 B 00011 C 11010011 D 1101001

  

  (68The main goals of Networkare sharing computer resources The resources include

  

  hardwaredata and ( )。

  

  A gateway B router C software D server "

  

  (69According to covering scope which three classes can computer network be divided ? ( )。

  

  APSNLANWAN BMANLANWAN

  

  CPSNFAST EthernetLAN DPSNFAST EthernetMAN

  

  (70In HDLC Protocol when Supervisory Frame's type code is '00 ' About the

  

  following statements which is correct .( )。

  

  AReceive Ready BReceive not Ready CReject DSelective Reject

  

  一、选择题

  

  1A 2A 3D 4A 5D 6B 7A 8B 9C 10A

  

  11B 12D 13A 14B 15A 16C 17D 18C 19D 20D

  

  21A 22A 23B 24B 25C 26B 27C 28A 29C 30D

  

  31C 32A 33C 34B 35A 36A 37C 38D 39C 40A

  

  41A 42D 43B 44B 45D 46A 47B 48B 49C 50B

  

  51A 52A 53A 54C 55D 56A 57A 58D 59A 60B

  

  61C 62C 63A 64C 65D 66B 67B 68C 69B 70A

  


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