NVIDIA interview questions

Theoretical questions about pointers and special types of pointers. The task was to implement a shared pointer class with all the operators.

You write 2 functions. Function 1 receives an array of strings and converts all the strings into one string, and a second function receives only the string and needs to know how to convert the string back to an array. How would you write the string in the first function so that you know how to separate the strings in the second function?