2. 计算机
  3. The obj ective of __________(71) is to determine what parts of the application software will be assigned to what hardware．The ma

The obj ective of __________(71) is to determine what parts of the application software will be assigned to what hardware．The ma

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问题 The obj ective of __________(71) is to determine what parts of the application software will be assigned to what hardware．The major software components of the system being developed have to be identified and then allocated to the various hardware components on which the system will operate．All software systems can be divided into four basic functions．The first is __________(72)．Most information systems require data to be stored and retrieved，whether a small file， such as a memo produced by a word processor or a large database，such as one that stores an organization’S accounting records．The second function is the__________(73)．the processing required to access data，which often means database queries in Structured Query Language． The third function is the ___________(74)，which is the logic documented in the DFDs，use cases，and functional requirements．The fourth function is the presentation logic，the display of information to the user and the acceptance of the user’s commands．The three primary hardware components ofa system are__________(75)．
(72)
选项 A、data access components
B、database management system
C、data storage
D、data entities
答案C
解析
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