Software Engineering

If you have maths as a subject in XII board then you can join BCA followed by MCA to become a software engineer. If you do not have maths as a subject, you can still join BCA but your college/ university options will be lesser as the majority of universities/ colleges eligibility criteria for BCA is maths in class XII board. For example, you can join BCA offered by IGNOU with Maths.

Both the branches are similar, but CSE engineering is in demand. So, you can opt for B.Tech in CSE.

You cannot avoid appearing in entrance examinations as most of private universities also conduct engineering entrance examinations for admission in their engineering programs. Few private engineering universities allows admission based on class 12th performance e.g. BITS - Pilani gives direct admission to toppers of different boards.

Go for UK, Germany, Canada, USA or Australia for IT.

Yes, you can pursue BCA and then MCA. You can even do M.Tech in CSE by clearing GATE after your MCA.