Case 1 - chaussure.com
chaussure.com is an online shoe retailer. The applications for the web site are developed using classes and object-oriented programming techniques.
-An application needs to calculate the sales tax for an order.Which of the following is a valid example of a variable in a class that can be validated in the Set block of a Property procedure?
A)Private TaxRate As Double
B)Private _dblTaxRate As Double
C)Public TaxRate As Double
D)Public _dblTaxRate As Double

Question

Quizplus · Accepted Answer

The correct choice is B) Private _dblTaxRate As Double. This is because encapsulation in object-oriented programming often involves using private variables within a class and providing public or protected access to them through property procedures. The use of a private variable, like _dblTaxRate, ensures that it can be validated or manipulated safely within the Set block of a Property procedure, maintaining the integrity of the data. The naming convention (prefixing with an underscore and using camelCase) is a common practice for private variables, although not strictly required by all programming languages.

Case 1 - Chaussure.com