semantics - What does "in-place" mean?

Question

Reverse words in a string (words are separated by one or more spaces). Now do it in-place.

What does in-place mean?

Answer 1

In-place means that you should update the original string rather than creating a new one.

Depending on the language/framework that you're using this could be impossible. (For example, strings are immutable in .NET and Java, so it would be impossible to perform an in-place update of a string without resorting to some evil hacks.)