Implementing a string copy function in C

Question

At a recent job interview, I was asked to implement my own string copy function. I managed to write code that I believe works to an extent. However, when I returned home to

Answer 1

No, you're writing past the buffer and overwriting (in this case) the rest of your stack past buffer. This is very dangerous behavior.

In general, you should always create methods that supply limits. In most C libraries, these methods are denoted by an n in the method name.