CH1

Question 1

What is a data ?

Answer 1

it is known fact that can be reocrded

Question 2

what is a database?

Answer 2

collection of related data

Question 3

what is a mini world?

Answer 3

it is some part of the real world

Question 4

what is a databse managemtn system?

Answer 4

it is a software that assitst in maintaining a large collection of data

Question 5

what is a databse system?

Answer 5

it is a databse and a database management system

Question 6

what does a database managemtn system does (DBMS)?

Answer 6

defines a databse(data and constatins and structure)
constructing the database: storing data
manipulation of data: quiriy and updating

Question 7

what is meta data?

Answer 7

it is data about the data so like the defining part of a DBMS

Question 8

what is the probelm with flat files ?
why do we need a dbms

Answer 8

it is hard acessign flat files and it requires expensive programs to answer quireies in addition it is time consuming a

it will have inconsistent data due to many users accessing the data simulatisly
it will have data redundancy (duplication)

Question 9

what makes up a databse?

Answer 9

entities and relationships

Question 10

what is a catalog?

Answer 10

it stores the defition and structure of the data used by dbms

meta data is info stored in the catalog