Hello Aspirant,

I would suggest you to go through with the previous year papers to know the level of the questions & do practice as much you can.

Here are some preparation books you can follow for the exam preparation.

A Comprehensive Guide for MCA Entrance Examinations by RS Aggarwal

A complete study package MCA Entrances of all Indian universities (Old Edition)

Excel With Objective Book For NIMCET By J B Dixit, Ruchi Sharma, Ashish Mangal

Arihant MCA Entrance Test (Self Study Guide) By Amit M. Agarwal

Good Luck!