1. What is virtualization in C++?
2. Given an array of integers, find two numbers such that they add up to a specific target number, return their indices.
3. Explain structures in C++.
4. Write a Python function to determine if a given number is prime.
5. Given a sorted array of integers, search for a specific target value using the binary search algorithm. Return the index of the target if found, or -1 if not found.