In C#, if overloaded functions have default arguments that could lead to ambiguity in function calls, it's important to avoid such situations. Ambiguity arises when the compiler cannot determine which overloaded function to call because the arguments provided match multiple overloaded versions.

For a function to accept a variable number of arguments, it should use the keyword "varargs" (short for variable-length argument list). Varargs is used in C and some C++ code to create functions that can accept a variable number of arguments. This is often used in functions like printf(), scanf(), and other cases where the number of arguments can vary.

In C++, the "*" (multiplication) operator has higher precedence than the "&&" (logical AND) operator. This means that when evaluating expressions, the multiplication operator will be evaluated before the logical AND operator. Understanding operator precedence is crucial for writing correct and efficient C++ code.

When global variables are declared outside all functions, they have static storage duration by default. Static storage duration means they exist for the entire program's lifetime.

The data type used for storing raw memory addresses is intptr_t, which is an integer type designed to hold a memory address. It ensures that memory addresses are correctly represented, allowing you to work with pointers and addresses in a portable way.

The term for the actual body of a function where detailed processing statements are written is "Implementation." It's in the implementation that you provide the logic and functionality for the function. The other options have different meanings: Prototype is a declaration of the function, Definition is a broader term encompassing various aspects of a function, and Signature refers to the function's name and parameter list.

In C++ and many other programming languages, the "else" keyword is used to specify a block of code that should be executed when the condition in an "if" statement is false. It's commonly used to provide an alternative action when the condition isn't met.

When you provide the necessary details about a function without its actual implementation, it's called "Definition." In a function definition, you specify the function's name, return type, parameter list, and what the function should do when called. The other options have different meanings: Declaration is a statement that tells the compiler about a function's name and signature, Invocation is the act of calling a function, and Execution is the process of running the function's code.

In most programming languages, including C++, multiplication (*) takes precedence over addition (+). So, in the given expression, c * d will be performed first.

Extensively using nested loops can significantly degrade performance. Each additional level of nesting increases the number of iterations exponentially, which can lead to slower code execution and increased resource usage. It's essential to carefully consider the need for nested loops in your code.