Is yep an interjection

Answer 1

The word yep is a distorted version of the word yes, which is an unusual word that does not quite fit the definition of either an interjection or an adverb, although it has some resemblance to both; it is classified as a sentence word, since an entire sentence is implied when you use it. Do you want some food? Yes. This means yes, I do want some food.

Answer 2

Yes, "yep" can be considered an interjection when used to express agreement or affirmation in casual conversation.