Hi Shreyas!

Yes, you need to justify your year gap during VISA Verification! Usually 1 year of gap will be allowed but when it exceeds it, then you will be asked for proper reasons. You have to show proof for your reasons like if you had any sickness you must show them your medical certificate stating you suffered from so and so. If you were working somewhere, then the proof for that. Whatever the reason is, have a proof in handy so you can provide it when asked!

Hope this is helpful!

All the best!