I have filled the intended arrival date in DS160 as 31st March but my visa interview date is 31st march.

As this is the earliest possible date i could get. So will it cause any issue. Will the visa officer ask anything about this? If yes, then what should be my answer?

No it is just an ‘intended’ date and is expected to be approximate. If asked, just let them know ‘the date is correct but a few weeks delay does not matter.’ You will not be asked.

Best wishes

Dr. Sandeep Shankar, hopehumanityATgmailDOTcom