Question

Which of the following refers to data redundancy?
(a) Deletion of Data
(b) Repetition of Data
(c) Decomposition of tables
(d) Relationships of tables

Answer 1

i think b reletition of data

Answer 2

Answer:

The correct answer is (b) repetition of data. It is a situation that arises in the database such that the same data is present in two different locations. For example a single file that's being stored in four different disks in the computer system.

The three main types of data redundancy in the computer system are:

1.Coding redundancy

2.Interpixel redundancy

3.Psychovisual redundancy.