Full Time MCA

I always follow one rule if the job is paying well and you are having fun doing it continue with the job and enroll in any part-time institute to do any course so you keep upgrading. If the job is not making you happy then work on changing the job but never leave it. But keep doing part time courses and keep upgrading.

You need to qualify the entrance test in order to pursue MCA.

Hi,
Some of the universities might have entrances, so you may check the eligibility here:
https://it.shiksha.com/mca-distance-education-in-india-categorypage-10-97-1-0-0-1-1-2-none-1-0

The percentage doesn't matter when it comes to a job. If you have the rights skill set, you will get a job anywhere you wish to.

Yes today many college offering non attending course with full time degree , Degree may be valid but first you have to check that university that is UGC approved or not and course is approved by AICTE or not , nodoubt this is not a leagal process but today there is so much lack of admission many college do like this but you can not mention your work experience during this time

Answer is yes little bit but you know what in these days job market, this full-time and distance education discrimination doesn't matter much.
If you choose a renowned and recognized distance education institute then no problem at all.