免费智能真题库 > 历年试卷 > 系统架构设计师 > 2019年下半年 系统架构设计师 上午试卷 综合知识
  第73题      
  章/节:   专业英语       

 
During the systems analysis phase, you must decide how data will be organized, stored,and managed.A   (71)   is a framework for organizing,storing,and managing data. Each file or table contains data about people, places, things, or events. One of the potential problems existing in a file processing environment is    (72)   , which means that data common to two or more information systems is stored in several places.
In a DBMS, the linked tables form a unified data structure that greatly improves data quality and access. A(n)   (73)    is a model that shows the logical relationships and interaction among system entities. It provides an overall view of the system and a blueprint for creating the physical data structures.    (74)    is the process of creating table designs by assigning specific fields or attributes to each table in the database. A table design specifies the fields and identifies the primary key in a particular table or file. The three normal forms constitute a progression in which  
   (75)    represents the best design. Most business-related databases must be designed in that form.
 
 
  A.  entity-relationship diagram
 
  B.  data dictionary
 
  C.  database schema
 
  D.  physical database model
 
 
 

 
  第73题    2011年下半年  
   68%
Information systems design is defined as those tasks that focus on the specification of a detailed computer-based soluti..
  第74题    2018年下半年  
   88%
Designing the data storage architecture is an important activity in system design. There are two main types of data stor..
  第72题    2011年下半年  
   58%
Information systems design is defined as those tasks that focus on the specification of a detailed computer-based soluti..
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