Set - 3

Question 6 :

Differentiate the class representation of Booch, Rumbaugh and UML?

Answer :

If you look at the class representation of Rumbaugh and UML, It is some what similar and both are very easy to draw.


Question 7 :

Whether unified method and unified modeling language are same or different?

Answer :

Unified method is convergence of the Rumbaugh and Booch. Unified modeling lang. is the fusion of Rumbaugh, Booch and Jacobson as well as Betrand Meyer (whose contribution is "sequence diagram"). Its' the superset of all the methodologies.


Question 8 :

What is meant by "method-wars"?

Answer :

Before 1994 there were different methodologies like Rumbaugh, Booch, Jacobson, Meyer etc who followed their own notations to model the systems. The developers were in a dilemma to choose the method which best accomplishes their needs. This particular span was called as "method-wars"


Question 9 :

Differentiate Aggregation and containment?

Answer :

Aggregation is the relationship between the whole and a part. We can add/subtract some properties in the part (slave) side. It won't affect the whole part. Best example is Car, which contains the wheels and some extra parts. Even though the parts are not there we can call it as car. But, in the case of containment the whole part is affected when the part within that got affected. The human body is an apt example for this relationship. When the whole body dies the parts (heart etc) are died.


Question 10 :

Why generalization is very strong?

Answer :

Even though Generalization satisfies Structural, Interface, Behaviour properties. It is mathematically very strong, as it is Antisymmetric and Transitive. Antisymmetric: employee is a person, but not all persons are employees. Mathematically all As' are B, but all Bs' not A.