Dear Vijay 

Since you completed electronics  you can write lots of exams.

You have to put lots of efforts and time for government exams 

The list of exams you can apply 

1.staff selection exmas 

2.state exams 

3.goverment electronics companies such as Bell , Hal etc 

For this you have to

Yes, you can go for 2019 intake as there is no such eligibility criteria in GRE. You can register for the test irrespective of age.

However, you have to fulfil the GRE eligibility criteria for individual institutes where you are applying. 

The are four sections in GRE General test- Verbal

• Engineering mathematics
• Networks, signals and systems
• Electronic devices
• Analog circuits
• Digital circuits
• Control systems
• Communications
• Electromagnetics

In order to get into NSIT you have to appear for JEE Main exam and you have to attend JAC counselling.

Below is the eligibility criteria of NSIT

-You must have secured at least 60% aggregate marks or more in Physics, Chemistry and Mathematics at Senior School Certificate Examination Level/XII.

You can check the cut off below in general category through MHT CET

VJTI

Electrical Engineering- Your rank should be around 900 in and marks should be around 163.

Electronics and telecommunication- Your rank should be around 670 in MHT CET and marks should be around 166

COEP

Assuming you are asking for KPCL Assistant Engineer (AE) Syllabus for Electrical and Electronics. So you can check the syllabus below -Mathematics related to Engg., Network-Analysis, Logic Design, Microcontrollers, Control Systems,Field Theory, Power Electronics, Transformers and Induction Machines, Signals and Systems, Transmission and Distribution, Engineering Physics and Chemistry, Introduction

DTU (ST category Outside Delhi)

CSE- Around 110 marks

ECE- Around 95 marks

NSIT (ST caregory outside Delhi)

CSE- Around 95 marks

ECE- Arounrd 90 marks

Good Luck!!

You need to score around 95 marks in JEE Main to get CSE branch in your home state quota and around 60 marks to get ECE in your home state quota under ST category.

Good Luck!!

Both are mostly equal branches & there is a little difference such as Communication Engineering is more preferable than Electronics and Telecommunication Engineering as it has a broader scope. 

Electronics and communication engineering deals with the details of the electronics sector and the communication sector.

Electronics and Tele communication engineering

For management quota you can contact the officials directly. 

To know the cut off marks and rank you can refer below link

TNEA Cut off 2017

Good Luck!!