BCA SEM - 2, GUJARAT UNIVERSITY
SUBJECT - DBMS(database management system)
CHAPTER - 3. ENTITY RELATIONSHIP MODEL
MCQS
1.The data models are not dependent on database management system(DBMS)
ANS : True
2.The basic component of E-R models include
ANS : all of these
3.The____reprents set of objects of same properties.
ANS : Entity
4.Each entity instance has its own value for each attribute.
ANS : true
5.A____attribute means it must take some value and cannot be left blank anyway.
ANS : Required
6.Which of the following is the simple attribute?
ANS : Gender
7.Which of the following is single valued attribute?
ANS : Both of a. and b.
8.In chen's notation multi valued attribute is indicated by doubled line.
ANS : Double line.
9.The____of a relationship describes the mapping of associated entity instances in the relationship.
ANS : Connectivity
10.The_____of a relationship is the actual number of related occurrences for each of the two entities.
ANS : Cardinality
Mcqs source - DOTCOM PUBLICATION