Database - Object-Oriented Data Modeling - Discussion

Discussion Forum : Object-Oriented Data Modeling - General Questions (Q.No. 5)

Object-Oriented Data Modeling

An abstract class is which of the following?

A class that has direct instances, but whose descendants may have direct instances.

A class that has no direct instances, but whose descendants may have direct instances.

A class that has direct instances, but whose descendants may not have direct instances.

A class that has no direct instances, but whose descendants may not have direct instances

Answer: Option

Explanation:

No answer description is available. Let's discuss.

Discussion:

3 comments Page 1 of 1.

Ambachew assefa said: 4 years ago

Please explain it in detail.

Kiran kumar said: 7 years ago

Interface- 100% not implemented methods.

Abstract class - 0 to 100% implemented methods.

Concrete class - 100% implemented methods.

Kadam shailesh ashok said: 1 decade ago

What is mining of the abstract class?

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