What is represented as a physical data store

Question

Problem:

Question 1- Which of the following is represented as a physical data store?

1. A database
2. A table in a database
3. A computer file
4. A tape or media backup of temporary files or anything important
5. All of the above

Question 2- The information system application layer that implements any processing that must be done to generate the user interface is known as

1. the presentation layer.
2. the presentation logic layer.
3. the application logic layer.
4. the data manipulation layer.
5. the data layer.

Provide the correct answer and justification for your choice.