This separation between the implementation and declaration of functions is beneficial for Code Modularity. It allows developers to organize the code into modular components, where function declarations provide the interface or contract for how to use a function, and the implementations reside in separate files. This promotes code reusability and makes it easier to manage large codebases by isolating changes to specific functions.

The primary purpose of the do-while loop in C++ is to repeat a block of code until a certain condition is met. Unlike the while loop, a do-while loop guarantees that the loop body is executed at least once before checking the condition. It's useful when you want to ensure a piece of code runs at least once.

The primary difference between a C++ statement and a declaration is that statements perform actions or operations, while declarations define variables or declare the existence of entities in the program. Statements execute code, while declarations specify the characteristics of variables, functions, or other program elements.

To create an overloaded version of the function void display(int a), you must have a different parameter list. In this case, void display(int a, int b); is a valid overloaded version because it takes two integer parameters instead of just one.

Default arguments in C++ functions provide the advantage of allowing parameters to have default values. This means that when calling the function, you can choose to omit certain arguments, and the function will use the default values for those omitted arguments. This is especially useful for creating more flexible and user-friendly functions.

For a loop to terminate, the loop condition should eventually evaluate to 'False.' If the condition remains 'True,' the loop will continue running indefinitely.

'Final' is not a visibility keyword; it's used to indicate that a method or class cannot be extended or overridden. The valid visibility keywords are 'private,' 'protected,' and 'public.'

Jack might be missing the cout << "Hello, World!" << endl; statement within his main() function. Without this line, nothing will be displayed on the screen when he runs the program.

In a switch-case structure, if a case does not have the break keyword, it will fall through to the subsequent cases or blocks until a break is encountered. The break keyword is essential to exit the switch statement once a case is matched and executed.

Default values of parameters in C++ functions should be specified in the function definition, not in the declaration. This is where you provide the actual implementation of the function, including the default values for its parameters. The declaration merely informs the compiler about the function's signature.

Robert should use Function Overloading in C++ to write a function that can accept either two or three parameters. Function Overloading allows a programmer to define multiple functions with the same name but different parameter lists. When Robert calls the function with two parameters, one version of the function is invoked; when he calls it with three parameters, a different version is invoked, providing flexibility and reusability in his code.

James has a misconception about function overloading. Function overloading allows multiple functions with the same name but different parameters. It's the difference in parameter types or the number of parameters that distinguishes overloaded functions, not the name alone.