B.Tech Scope

To get a government job in the field of aerospace engineering, you need to take various prescribed entrance exams such as GATE which are widely accepted by PSUs and MNCs.

Go through the link below for details :
https://www.shiksha.com/engineering/colleges/distance-correspondence-diploma-courses-india?ts=72808471&rf=filters&cr[]=10&cl[]=15&ed[]=et_21::dm_34 (copy paste the entire link on the browser ). .

Hi,
Jobs:
Trademarking company:
- Export
- Indian Police Force
- Indian Railways
- Nationalized Banks
- Civil services
You can also get a job in Indian Army, Navy or Air Force.
In the private sector, you can get a job in many companies like:
- Nestle India
- Cadbury
- Sunfeast
- Britania
- Coca-cola
- Pepsico
- Kurkure
- Lehar
- Lays
- Parle.

Your B.Tech will be considered to apply for MBA abroad as you have done it recently.

As you are a graduation degree holder the best course for you will be a post-graduation. I suggest that you may think of doing a degree in business administration, I mean MBA.
You can even get into Masters in English if you want to pursue a passion in literature. However, an MBA in IT or some IT related domain can be the best choice for career growth.

Hi dear, There is job in Kolkata at the same time the competition is very tough because of so many graduates. The average salary of a B.Tech engineering in Kolkata is around 3.5 -4 lac per annum for beginners. Salary tends to increase with experience and your position in the company. Do upvote the answer.

You can definitely get a decent job in Kolkata if you have the required skills. Electronics and instrumentation engineering do provide a lot of scope in both IT and non-IT sector. But remember one thing, don't be assured that a company will allow you to work only at one city. You may have to go at other places as well.

I appreciate your sense of approach. Answering your question. Changing a branch is up to you my friend (my personal opinion is to not to change the branch).
But before you opt for another branch, keep an eye on various subjects and your interests upon the subject. It's your future and your own life. So, you should be aware of your interests and take a branch according to your interest. Talking about your preparation which you did in these 3 years, it doesn't mean the struggle you had is useless. Remember, every experience gives you the new technique and new ideas. So, never lose hope and keep trying.

No, it's not at all a problem if we pursue MBA after B.Tech because if you want to pursue MBA, you can also do it by taking BBA. Whereas coming to your point, the marks will never be deducted if we pursue MBA after B.Tech as it is not about marks.