The first question asks for the entry point of a C++ program. The options are `int main function`, `return 0`, `using namespace std`, and `#include`. The second question asks which of the following arithmetic operators has the highest precedence: `**`, `*`, `/`, or `mod`.

1. Problem Description

The first question asks for the entry point of a C++ program. The options are `int main function`, `return 0`, `using namespace std`, and `#include`.

The second question asks which of the following arithmetic operators has the highest precedence: `**`, `*`, `/`, or `mod`.

2. Solution Steps

First question:

The entry point of a C++ program is the `int main` function.

Second question:

Operator precedence in C++ (and many other languages) is as follows:

1. Parentheses `()`

2. Exponentiation `**`

3. Multiplication `*`, Division `/`, Modulo `%` (have the same precedence, evaluated left to right)

4. Addition `+`, Subtraction `-` (have the same precedence, evaluated left to right)

In the given options, `**` represents the exponentiation operator. `*` and `/` represent multiplication and division respectively, and `mod` is the modulo operator. Exponentiation has the highest precedence among these options. Note that C++ does not have a built-in exponentiation operator like `**`. However, since this is a question about operator precedence, the correct answer should be exponentiation.

3. Final Answer

First question: int main function

Second question: **