Question

What mark of punctuation is most closely associated with
interjections

Answer 1

i would say a question mark not just because they look similar but they can be used the same way like DUDE? or DUDE! see its probably right look it up if ur not sure

Answer 2

That is an exclamation point!!!!!!!!!

It could be, however, commas. If that is what you mean by an interjection.