What is the meaning of this question?

Question

https://www.sololearn.com/post/234360/?ref=app

Does truncate mean the truncation of a file when you write to it in w(write) mode as opposed to a(append) for example?

Answer 1

blackwinter thanks. I guess I have to remember that truncate means delete and overwrite here.

Answer 2

These modes seem common amongst multiple languages.