Yes there is no problem in placements even if you are a candidate outside Delhi.

As per Careers360 rating and ranking DTU is rated as AAAA+ college which means an Outstanding college and NSIT is rated as AAAA which means a Very Good college.

Both intake for Btech is through Jee Main exam.

The placements vary for different branches. In DTU you can expect an average salary of Rs5-6 lakhs per year and in NSIT you can expect approx 4-5 lakhs per year.

This can vary on the branch you choose majorly.

Good Luck.