You are designing a software solution for an automobile rental company.You have decided that the following nouns apply to the requirements: Auto, Customer, Address, Rental Contract, Mileage, Rental Date, Daily Rate, Total.Which of these should be represented as instance variables?
A)Mileage
B)Mileage, Daily Rate.
C)Mileage, Rental Date, Daily Rate.
D)Mileage, Rental Date, Daily Rate, Total.

Question

Quizplus · Accepted Answer

Instance variables are typically properties or attributes of an object. In this case, the relevant objects are Auto, Customer, and Rental Contract. Mileage is a property of the Auto object and Daily Rate is a property of the Rental Contract object. Rental Date could be a property of either the Rental Contract or the Auto object, but since the requirement specifies Rental Date and Daily Rate together as instance variables, it is likely that they belong to the Rental Contract. Total is not a property of any individual object, but rather a calculation that can be made based on information from multiple objects. Therefore, the best choice is C, which includes the instance variables Mileage, Rental Date, and Daily Rate.

You Are Designing a Software Solution for an Automobile Rental