engineering recuitment NIC NIELIT Scientist B 2023 Mock Test DBMS Introduction and ER Model ER Model
Given the basic ER and relational models, which of the following is INCORRECT?
1
An attribute of an entity can have more than one value
2
An attribute of an entity can be composite
3
In a row of a relational table, an attribute can have more than one value
4
In a row of a relational table, an attribute can have exactly one value or a NULL value