III BCOM(CA) - DBMS - UNIT-1 Notes
Unit-I: Data and Information,File, Database, Database Management System, Objectives of DBMS, Evolution of Database Management Systems, Classification of Database Management System. Q) Define a) Data b) Information c) File Answer: a) Data:- Data is the known facts or figures that have implicit meaning. It can also be defined as it is the representation of facts ,concepts or instruction in a formal manner, which is suitable for understanding and processing. Data can be represented in alphabets(A-Z, a-z),in digits(0-9) and using special characters(+,-.#,$, etc) e.g: 25, “ajit” etc. b) Information:- Information is the processed data on which decisions and actions are based. Information can be defined as the organized and classified data to provide meaningful values. Eg: “The age of Ravi is 25” C) File:- File is a collection of related data stored in secondary memory Q) Define DBMS. Explain some functions/Objectives of DBMS. Answer: Database Manag...