Civil Engineering

You need to appear for GATE exam. If you want to opt for M.Tech abroad, then appear for GRE and TOEFL exam.

There are plenty of jobs available in civil engineering. You should visit your state government and central government website frequently, and look for the job notification. Since the competition will be higher for government jobs, they conduct competitive exams. Prepare well and try to crack the exam.
All the best.

Dear Siddarth,
If you intend to pursue your higher education in the same field, you need to check out with the university chosen by you as to which level they can admit you after they check the subjects taken by you in your Diploma. You also need to score good marks in IELTS exam.

Diploma in engineering is not equivalent to graduation. For post-graduation Diploma, one needs to have a degree in engineering. I am sorry to inform you that you are not eligible for this course.

Yes, you can take admission in IITs after your Diploma through lateral entry program. You have to check the eligibility criteria. For lateral entry, there is an entrance exam required or some IITs have on merit basis also.

It is true, but don't think about all of that. You just need to concentrate to learn and focus on your studies.

It depends on individual's interest. Major disciplines in MBA are as follows:
1. Operations: It needs analytical knowledge with fair hands on mathematics.
2. Finance: Needs basic knowledge of accounting and share, equity, credit-debit transactions.
3. Marketing: Deals with promotion and advertising strategy to convince the target customers for your product.
4. HR: It requires good communication skills to deal with your team. You need to get the best out of your team and keep them motivated.

Refer link below for details:
http://www.inspirenignite.com/non-gate-or-without-gate-m-tech-admissions-2016

You have following options with you (a) Job (b) Lateral entry into B.Tech Civil Engineering (c) Along with job do AMIE to have graduation degree. You may chose any of the option based on your personal interests and conditions.