Answer:
Explanation:
a. In this scenario, the best solution would have an Object of Traditional Books, CD, Music, Bookstore and Customer.
b. All five objects would be able to be called by the main program loop and the Customer Object would call upon and use either the Books or CD object, While the Bookstore object would call upon all of the other objects.
c. Both the Bookstore object and Customer object will "have" other objects as the Bookstore needs to hold information on every Book or CD in the Inventory. While the Customer object would call upon the Book and CD object that they are purchasing.
d. The Music Object will extend the CD object and use information on the CD object as its parent class.
e. Since the Music Object extends the CD object it is also considered a CD since it is in CD format like the Books on CD and therefore is both objects.
The number and letter are switched. This question needs more context to get a accurate answer.
Answer:
PSTN
Explanation:
The full form of PSTN is Public Switched Telephone Network. It is a traditional circuit-switched telephone network which is used by the several regional, local or national telephony operators. They came in used in 1800s. It is a form of communication among the people which works with the help of underground copper wires.
In the context, when I am travelling through the metropolitan as well as the rural areas of the North America, the PSTN provides the internet connectivity in all the places. It helps me to communicate with the other people with the help of a telephone.
Answer:
The restaurant chain system consist of restaurant id, name, zipcode, manager id, menu list.
Manager; manager id, name, phone no, and store.
Menu; menu id, type, items and description.
Items; item id, price and description.
Explanation:
Please look at the attachment for the E. R diagram.
