Question

17. The major symbols used in data dictionary are: i) = , ii) + , iii) { } , iv) O
(A) i, ii and iv
(B) ii, iii and iv
(C) i, iii and iv
(D) All i, ii, iii and iv​

Answer 1

The major symbols used in data dictionary are:

A) all i, ii, and iv.

• The major symbols are = , + , () .

• Data dictionary is used in the development of software. It is a set of information which describes the contents, format, structures of a database and the relationship between their elements.

• In data dictionary it defines all the data item present in the software and also it have control over the manipulation of the database.

• In this, for developing the content description of a data item in the software , it need some notations or symbols .

• The symbol = means is composed of .

• The symbol + means and .

• The symbol { } means n repetition of , but it's not majorly used.

• The symbol () means optional data.