Question

Match Data Independence to one of the following choices:

A. An integrated decision support database with content derived from various operational databases and external sources

B. A logical description of some portion of the database that is required by a user to perform some task

C. A software system that is used to create, maintain and provide controlled access to user databases

D. A centralized knowledge base of all data definitions, data relationships, screen and report formats, and other system components

E. The separation of metadata from application programs that use the data

Answer 1

Option E - Seperation of metadata from application programs that use the data.

Data indepence is defined as the data transparency in the centralized DBMS. Data transparency is ability to resist or to withstand any changes in the physical or logical structure. It means that, though we perform any changes in the structure of the physical or logical data, its basic function does not changes. Its function remains same.

Metadata is a layered structure. If structure is changed at one layer, data at another layer doesn't get effected. In this way, data Independence occurs.

So, from above definition, we can say that option E is the correct option.

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