B.E.

No, you are not eligible to appear in JEE Main examination after completion of your Polytechnic course. To be eligible to appear in JEE Main examination, you must have completed 12th standard with Mathematics, Physics and Chemistry subjects from a recognised board.

Yes, you can be eligible. Manav Rachna International Institute of Research and Studied offers B.Tech Lateral admissions in Biotechnology. The eligibility criteria is given below. Eligibility criteria : 50% marks in 3-year Diploma in Engineering in any branch/discipline from State Board of Technical Education or Equivalent Examination or B.Sc. Degree from a recognized University as defined by UGC, with at least 50 % marks and passed XII standard with Mathematics as a subject. Because you have completed B.Tech in ECE so you are also entitled to take admission here.

Hello,
Get acclimatized to the mode in which exam is going to be conducted. Practice a lot. Must refer to the short notes for revision. Appear for full length NTA UGC NET Mock Test papers and check your efficiency. You will also get to know about the weak areas. Now let us talk about the difficulty level, for the real feel of exam, for the real difficulty level and to get to know how a simple question is made complex in the examination, just practice previous year question papers. One more thing while solving previous year test papers, rely on only official answer keys. Hope the above information helps.

Yes, universities do take a close look at the number of backlogs. Most of the top good universities do not accept more than 6 (or 8) backlogs. For top universities, it would be maximum 2. Secondly, they would also look at the CGPA in the last 2 years (4 semesters).