Polytechnic

As per your branch need, you are supposed to have a laptop after all you are going to code something.
If I borrow a laptop in your college for your projects, then it will fine.
But make sure, you are going to be a software engineer.
Practice matters most.

CAREER PROSPECTS AND JOB OPPORTUNITIES
Diploma in Agriculture and agro Polytechnic course passed candidates have access to private as well as government sector jobs. This qualification is enough to secure entry level jobs in both these sectors. Since the course deals with agriculture and its allied areas, the common recruiters include
Banks
Food production firms
Government Agricultural Boards
Private fertilizer manufacturing firms
Government fertilizer manufacturing firms
Agriculture machinery manufacturing firms
Plantations.

Dear Charles, there is no age for learning. So, its okay if you have 3 years gap. Submit gap certificate and take admission. You can appear for LEET exam or go for university specific exams or even go for direct admission subject to fulfilling the eligibility criteria. Universities like LPU, DIT, Mangalyatan, Chitkara, etc. Are offering B.Tech Lateral entry. All these universities have wonderful infrastructure and world-class facilities to offer to students apart from good placements. Some even offer scholarships to meritorious students. Good luck.

First off all you should get at least above 90% aggregate of level subjects. Also, do some research on good colleges for your branch, see the last year cutoffs, placements and overall ratings. Even these all things will matter but the very first thing is your marks so work hard and get good marks. All the best.

Hello Umesh, One has to upload marksheet of the last semester only. The system will surely give enough time after declaration of results for this purpose. So my advice is just do not worry.

Yes, you are eligible for many government exams if you have done Diploma. I would suggest you apply to ISRO and DRDO.

Yes, it is possible. You can start your Polytechnic Diploma with the desired branch after which you can do your graduation also.
All the best.
Good luck.

There are many colleges like:
Indira Gandhi Engineering College
Jabalpur Engineering College
Gyan Ganga College of Technology Jabalpur
Lakshmi Narain College of Technology
Gwalior Engineering College
Ujjain Engineering College.