1. Let us consider below a class diagram and an object diagram. Is the object diagram valid according to the given class diagram?

2.Given the below UML class diagram, which of the following objects diagrams are valid?

a. all of them;

b. only 1 and 2;

c. only 3;

d. only 1 and 3;

e. None of the above.

3.Given the below UML class diagram, which of the following objects diagrams are valid?

a. all of them;

b. only 1 and 2;

c. only 3;

d. only 1 and 3;

e. None of the above.

4. Which of the following is false about the aggregation relationship?

a. Aggregation is a stronger form of association.

b. Aggregation is anti symmetric.

c. Aggregation is informal meaning of the "whole-part" relationship.

d. Aggregation is not transitive.

e. The most important usage of the aggregation is to disallow any cyclic object linkage.

1. 2. 3. 1. 2. 3. 1. 2. 3. 1. 2. 3