In C++, when a return type is not explicitly provided for a function, it defaults to 'void.' This means the function does not return a value. It's essential when you have functions that perform actions without returning a result, such as void functions for input/output or setting variables.

Functions in C++ can return multiple values using tuples. A tuple is an ordered collection of elements, and it's an excellent way to return multiple values from a function. It's more flexible than returning values using pointers, references, or arrays, as it allows you to return values of different types. Tuples were introduced in C++11.

In C++, the 'typedef' keyword is used to define user-defined data types. It allows you to create aliases for existing data types, making your code more readable and maintainable.

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

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.

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.

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.

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.

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 process by which the correct function is selected from a set of overloaded functions during compile time is termed as Function Resolution. It is the compiler's job to determine which overloaded function to call based on the arguments provided. This ensures type safety and efficiency in function calls.