Accounting & Commerce

Go through the link below:
https://it.shiksha.com/it-cyber-security-courses-in-delhi-ncr-categorypage-10-127-1-0-0-10223-1-2-0-none-1-0

You may opt to pursue BBA and eventually MBA.This will give you insight on business management.

Manav Rachna (MRIU) is a deemed University under UGC. You can get admission into it if you just have a score card of AIEEE/IIT.
There is no rank criteria as far as I have known. Ranks ranging from 50k to 10 Lakhs are admitted here.
College Fee is quite high and you have other options like GD Goenka an

PGDCA is only advisable if you aim for a career in IT industry. Also you should pursue MCA after the PG Diploma in order to enhance career opportunities.
Eligibility requirement:
For seeking admission to the Post Graduate Diploma in Computer Applications course, candidates must have completed their gr

Hundreds of courses in DU, Please specify the stream.

This is dependent on the college that you pursue the course from.

Check this link:
https://www.shiksha.com/accounting-commerce/articles/course-options-after-b-com-blogId-12939

The software would be a company specific need, so you need to work on the details of the company that you aspire to work for.

The best college is SRCC but the cut-off is quite high.