An advantage of database processing over traditional file processing is: a. Data

Question

An advantage of database processing over traditional file processing is: a. Databases usually store small amounts of data b. Databases provide for data independence c. Databases totally eliminate data redundancy d. Each database application has its own unique data file, data is not shared e. Databases store information only on PCs, making data more accessible

A distinguishing feature of the relational data model is that:

a. Primary keys exist b. There is no redundant data c. All tables include composite keys d. Application programs cannot be written to access data – only interactive SQL is used e. Relationships are inherent within the data – there are no explicit linkages between tables

Explanation / Answer

1. b)Databases provide for data independence: As programs and data are independent, programs do not have to be modified when types of unrelated data are added to or deleted from the database, or when physical storage changes.

2e) Relationships are inherent within the data – there are no explicit linkages between tables

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