Object Oriented Data Modeling
Which of the following statement is true concerning objects and/or classes?

A class is an instance of an object.
An object includes encapsulates only data.
A class includes encapsulates only data.
An object is an instance of a class.

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Object Oriented Data Modeling
Aggregation is which of the following?

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

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