hello asha sharma
I hope you are doing good.
I have given national level test of mca so i do think that i would able to you inform better about mca entrances . Taking admission in guru nanak dev university is not very tough task as the level of exam is easy . The syllabus is divided into 3 sections which is maths, logicial ability , computer awareness . Try to focus on the some easy of topics of maths but make a good command in it like trigo , differentiation , permutation and combination ,set theory and for Lr topics like blood relation, coding decoding, series are some topics which you can have focus on .Dont forget to 10 year papers thoroughly
Hope you found this answer helpful. Good luck for your future