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  第75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.  standard notation form
 
  B.  first normal form
 
  C.  second normal form
 
  D.  third normal form
 
 
 

 
  第72题    2015年下半年  
   52%
The  objective of (71)is to determine what parts of the application software will be assigned to what hardware.Th..
  第74题    2012年下半年  
   69%
An application architecture specifies the technologies to be used to implement one or more information systems. It serve..
  第73题    2021年下半年  
   42%
The prevailing distributed computing model of the curent era is called ctiem servar computing.A(71)is a solution in wh..
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