Modern Database Management Updated Actual Questions And Correct Answers Complete Study Guide

MODERN DATABASE MANAGEMENT
UPDATED ACTUAL QUESTIONS AND
CORRECT ANSWERS COMPLETE STUDY
GUIDE

●● What is data?
Answer: Stored representations of meaningful objects and events.


●● What are structured data types?
Answer: Data types that include numbers, text, and dates.


●● What are unstructured data types?
Answer: Data types that include images, video, sound, and documents.


●● What is information?
Answer: Data processed to increase the knowledge of those who use it.


●● What is metadata?
Answer: Data that describes the properties and context of user data.


●● What is program-data dependence?

, Answer: The requirement for all programs to maintain metadata for each
file they use.


●● What is duplication of data?
Answer: Having different systems or programs maintain separate copies
of the same data.


●● What is limited data sharing?
Answer: The lack of centralized control of data, hindering data sharing.


●● What are the disadvantages of file processing?
Answer: Program-data dependence, duplication of data, limited data
sharing, lengthy development times, and excessive program
maintenance.


●● What is a data model?
Answer: A graphical diagram capturing the nature and relationship of
data, including entities, attributes, and relationships.


●● What is an entity in a database?
Answer: A noun form describing a person, place, object, event, or
concept, composed of attributes.


●● What is a relationship in a database?