Database-Management-System

Question 504

Specialization is __________ process.

A	top-down
B	bottom up
C	both (A) and (B)
D	none of these

Database-Management-SystemER-ModelUGC NET CS 2009 Dec-Paper-2

Question 504 Explanation:

→ Generalization – the process of defining a general entity type from a collection of specialized entity types.
→ Specialization – the opposite of generalization, since it defines subtypes of the supertype and determines the relationship between the two.
→ Specialization is a top down approach. The following example “Employee” could be a developer or a tester.

Correct Answer: A

Question 504 Explanation:

→ Generalization – the process of defining a general entity type from a collection of specialized entity types.
→ Specialization – the opposite of generalization, since it defines subtypes of the supertype and determines the relationship between the two.
→ Specialization is a top down approach. The following example “Employee” could be a developer or a tester.