DBMS-Unit2-Quiz

Entity is a _________

• Object of relation

• Present working model

• Thing in real world

• Model of relation

The descriptive property possessed by each entity set is _________

• Entity

• Attribute

• Relation

• Model

The attribute name could be structured as an attribute consisting of first name, middle initial, and last name. This type of attribute is called

• Simple attribute

• Composite attribute

• Multivalued attribute

• Derived attribute

The set of permitted values for each attribute is known as_____

• Domain

• Set values

• Attributes

• Action Set

In an ER model , an association among several entities is known as________

• Relationship

• Connection

• Participation

• Synchronization

_____________ express the number of entities to which another entity can be associated via a relationship set.

• Mapping Cardinality

• Relational Cardinality

• Participation Constraints

• None of the mentioned

We wish to ensure that a value that appears in one relation for a given set of attributes also appears for a certain set of attributes in another relation. This is called a _________

• Set Integrity

• Referential Integrity

• Join Integrity

• All the above

Which of the following statements are true

a.ER model is process oriented model

b.ER model belongs to semantic model category

• a only

• b only

• a & b only

• none of the above

In the Enhanced-Entity relationship, the collection of entities in the form of set is called_______

• Construct

• Object

• class

• Schema

The entity involved in the process of specialization is considered as________________

• Medium class of entity

• Mini class of Entity

• Sub class of Entity

• Super class of Entity