How do I justify my one year gap after my graduation in any interview?

Everybody like to talk about honesty but they hardly value in a corporate environment.

I would advise you to refrain from telling everything like everyone else is saying. Everybody like to talk about honesty but they hardly value in a corporate environment.
I will advise you to come with a story which is convincing enough and can not be verified.
All the best!!

You can say that you water interested in doing business & wanted to give yourself a try but didn't succeed or I was pursuing my hobby as my career but not i got to know that there is not a good career in that.