A. Components of a Data Base System: -Data dictionary
-Definition language
-Data manipulation language
-Data query language
-Report writer
-Application program
-Data base administrator



B.
Advantages Disadvantages

-Data integration -New system costs
-Data independence -Maintenance cost
-Reduce data redundancy -Cost to retrain employees
-Integration of application
-Speed of information
-Efficiency
-Report flexibility




C. DBA has the following responsibilities: -Create logical models of the data base.
-Establish data standards and specifications.
-Approve changes to the data base structure.
-Develop retrieval methods as required by data base users.
-Specify and maintain the physical structure of the data base.
-Maintain the data dictionary.
-Design and implement controls to ensure the accuracy and security of the data base.