Object Oriented Data Modeling
A constructor operation does which of the following?

Creates a new instance of a class
Deletes and existing instance of a class
Updates an existing instance of a class
All of these

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Object Oriented Data Modeling
Aggregation is which of the following?

Expresses an is-a relationship and is a weaker form of an association relationship.
Expresses a part-of relationship and is a weaker form of an association relationship.
Expresses a part-of relationship and is a stronger form of an association relationship.
Expresses an is-a relationship and is a stronger form of an association relationship.

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