As long as you can justify your gap with valid reasons, it should not be a problem. But it would be an advice not to disclose that you spent time only for cat preparation. On the flip side, do not lie, you will be easily caught.Try explaining in the interview what relevant skills you added in this time, any certification, any soft skill course or even investing time in your hobby. All the best

Hello arbaaz it wont matter much if you take a gap but during interview you may be asked for why did you take a gap after your graduation. 

If u need any help please do comment 

all the best!!