Question

Consider below statements

1. In ERD, Attributes are associated only with the entity set
2. In UML, A relationship between two class can be association, composition or aggregation
Select one:
a. false, true
b. true, true
c. false, false
d. true, false

Answer 1

In an ERD, attributes are associated only with the entity set. In UML, a relationship between two classes can be association, composition, or aggregation.

Step-by-step explanation:

The correct answer is b. true, true.

In an ERD (Entity-Relationship Diagram), attributes are associated only with the entity set. This means that attributes are represented within the entity box or circle. For example, if we have an entity set called 'Employee', attributes like 'name', 'age', and 'salary' would be associated with that entity set.

In UML (Unified Modeling Language), a relationship between two classes can be of three types: association, composition, or aggregation. Association is a simple relationship where one class is connected to another class without any ownership. Composition is a stronger relationship where one class is composed of another class, and if the composing class is destroyed, then its composed class is also destroyed. Aggregation is a weaker form of composition where the composed class can exist independently even if the composing class is destroyed.