NIMCET

As you are pursuing your Bachelor's degree from distance learning? Then, you've to work harder on developing your skills because many IT Firms don't tend to hire candidates from distance learning educational background. Therefore, you need to put in your extra time in learning and understanding concepts of your BCA. If you want to learn a programming languages then you need to understand and implement the concept side by side. Just understand the concept first in theory then look at the programme and after that try to write the programme by yourself. Consider taking help from internet to get much deeper knowledge. If you want to learn programming languages which you will be studying in your BCA course then you can check out this app which is specially designed and developed for BCA students. It has programs and assignments of languages like C, C+ and Java with their outputs. You'll be studying these languages in your 3 years of BCA. https://play.google.com/store/apps/details?id=technark.bca_courprogramming.

NIMCET Eligibility Criteria 2018:
Candidates must be Indian nationals. They should be graduation degree holders (BCA/B.Sc (Hons. )/B.Sc/BIT) as per 10+2+3 pattern from a recognized university. Candidates must have studied Mathematics or Statistics or equivalent subject during graduation. Candidates belonging to General category are required to score a minimum of 60% marks or 6.5 CGPA score in aggregate of all subjects. SC/ST category candidates need to obtain at least 55% marks or 6.0 CGPA score on a 10 point scale in aggregate. Those, who hold Bachelor of Engineering (B.E)/B.Tech degree or equivalent degree, are also eligible for NIMCET 2018. Hope this helps you.

I am suggesting you some of the books for the preparation of NIMCET.
Reference books for NIMCET:
Arihant MCA Entrance Test by Admit M. Agarwal
Arithmetic for Competitive Examinations by Jain & Sharma
Barrons Military Flight Aptitude Tests by Terry L. Duran
Common Errors in English by Abul Hashem
English Reading Comprehension by Anjani A Gupta
A Comprehensive Guide for MCA. Entrance Examination by R. S. Agarwal & Deepak Agarwal
A Concise English Grammar by RPH Editorial Board
A Modern Approach to Non Verbal Reasoning by R. S. Aggarwal
A Text Book on Calculus by S. K. Goal
Advance General English by H. S. Bhatia
All about Reasoning (Verbal) by Anjani A Gupta
Objective General English by Anjani A Gupta
Objective Mathematics by M. L. Khanna
Quantitative Aptitude by Rita Mishra
Quantitative Aptitude for Competitive Examinations by R. S. Aggarwal
Hope it helps.