CLASS Employee {
//Variables
String LastName;
String FirstName;
Real HourlyRate;
Integer HoursWorked;
Date HireDate;
String Job;
//Methods
Real Salary();
String GetLastName();
String GetFirstName();
String GetJob();}

-The ability by a program do to the following violates encapsulation principles:
A) Directly Access LastName
B) Retrieve LastName with method GetLastName();
C) Retrieve Job with the method GetJob();
D) Compute salary with method Salary()

Question

CLASS Employee {
//Variables
String LastName;
String FirstName;
Real HourlyRate;
Integer HoursWorked;
Date HireDate;
String Job;
//Methods
Real Salary();
String GetLastName();
String GetFirstName();
String GetJob();}

-The ability by a program do to the following violates encapsulation principles:
A) Directly Access LastName
B) Retrieve LastName with method GetLastName();
C) Retrieve Job with the method GetJob();
D) Compute salary with method Salary()

Quizplus · Accepted Answer

Directly accessing LastName violates encapsulation principles because it exposes the internal implementation details of the program and makes it more difficult to maintain and update the code in the future.

Answer: B and C 
 Retrieving LastName and Job with methods that have been specifically designed to return those values (i.e. GetLastName() and GetJob()) is a better approach to accessing those properties because it still maintains the encapsulation principles by hiding the internal implementation details of the program.

Answer: D 
 Computing salary with a method called Salary() is a valid use of encapsulation principles because it is providing a service for the user of the program and does not expose the internal implementation details of the program.

CLASS Employee { //Variables