DBMS-Enhanced Entity-Relationship (EER) Model Questions and Answers

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Showing 10 of 57 questions
Q1
Subclasses are the sub-grouping of occurrences of entities in an entity type that shares common attributes or relationships distinct from other sub-groupings.
  • A TRUE
  • B FALSE
Answer: Option A
Q2
In case of supertype, objects in one set are grouped or subdivided into one or more classes n many systems.
  • A TRUE
  • B FALSE
Answer: Option A
Q3
Superclass is a generic entity type that has a relationship with one or more subtypes.
  • A TRUE
  • B FALSE
Answer: Option A
Q4
Each member of the subclass is also a member of the supeclass.
  • A TRUE
  • B FALSE
Answer: Option A
Q5
The relationship between a supeclass and a subclasses is a one-to-many (1 . N) relationship.
  • A TRUE
  • B FALSE
Answer: Option B
Q6
The U-shaped symbols in ERR model indicates that the supertype is a subset of the subtype.
  • A TRUE
  • B FALSE
Answer: Option B
Q7
Attribute inheritance is the property by which supertype entities inherit values of all attributes of the subtype.
  • A TRUE
  • B FALSE
Answer: Option B
Q8
Specialisation is the process of identifying subsets of an entity set of the superclass or  supertype that share some distinguishing  characterstic.
  • A TRUE
  • B FALSE
Answer: Option A
Q9
Specialisation minimizes the difference between member of an entity by identifying the distinguishing and unique characterstics of each member
  • A TRUE
  • B FALSE
Answer: Option A
Q10
Generalization is the process of identifying some common characterstics of a collection of entity sets and creating a new entity set that contains entities processing these common characterstics.
  • A TRUE
  • B FALSE
Answer: Option A

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