Question

Which of the following database models requires knowledge of the hardware being used?

Question 40 options:

	1) External model
	2) Conceptual model
	3) Internal model
	4) Physical model
	5) None of the above

Answer 1

Correct Answer: 5) None of the above

Explanation:

Conceptual Model:

The conceptual model provides the basis for external view or schema and it is a complete description of data stored in the database.

Internal Model:

The internal model gives information about how data is stored on the hard disk. In other words, we can say that it gives information about what data structure is used to store data on the hard disk.

External Model:

The external model is the view of each user group of an organization and this view is responsible for the security of the database because we can't show the entire data to all users.

Physical Model:

The physical model gives information about how data is stored on the hard disk and it is nothing but binary form, which is controlled by the OS.

For all of the above models, there is no need for knowledge of the hardware being used.

So, only option 5 is the correct option.