data mining & data ware house set 2 Detailed Explanation And More Example

Question : 1

Knowledge is referred to

a) Non-trivial extraction of implicit previously unknown and potentially useful information from dat(A)

b) Set of columns in a database table that can be used to identify each record within this table uniquely.

c) collection of interesting and useful patterns in a database

d) none of these

Question : 2

Data cleaning is

a) Large collection of data mostly stored in a computer system

b) The removal of noise errors and incorrect input from a database

c) The systematic description of the syntactic structure of a specific database. It describes the structure of the attributes the tables and foreign key relationships.

d) None of these

Question : 3

Integrated is

a) The amount of information with in data as opposed to the amount of redundancy or noise

b) One of the defining aspects of a data warehouse

c) Restriction that requires data in one column of a database table to the a subset of another-column.

d) None of these