Government & Defence Entrance Exam

Electronics and Communication Engineers are acquired by top recruiters (both private and government) like DMRC, Siemens, Motorola, Intel, Texas Instruments, BEL, ISRO, DRDO, Accenture, Wipro, HCL Technologies, nVIDIA, Samsung, Tech Mahindra, Infosys, TCS, Conexant, MTNL, AIR, BSNL, Indian Air force, Indian Navy, Railways, Bharat Electronics Ltd and Flextronics and Philips Electronics.
The average salary of an Electronics and Communication degree holder is between INR 3.5 lakh and INR 4.5 lakh per annum. Fresher candidates usually get a starting salary of INR 20,000 to INR 30,000 per month depending upon their interview performance and knowledge.
All the best.

You may refer to following link for list of top B.Tech Mechanical Engineering colleges in India: https://www.shiksha.com/b-tech/ranking/top-mechanical-engineering-colleges-in-india/48-2-0-0-0
There are multiple options to join Indian Navy after B.Tech Mechanical Engineer:
(a) CDS Entry: CDS entry consists of written exam conducted by the UPSC, followed by conduct of the SSB interview, medical test by Indian Navy (naval candidates only) and final preparation of merit list by UPSC. The appointment letter is issued by IHQ MoD/DMPR. The training of officers selected through this entry commences in the month of Jan/Jul and the advertisement is published in Nov/Jul.
(b) NCC Entry: The vacancies for Naval Wing Senior Div NCC C certificate holders are published along with CDSE advertisement. No written test is conducted for this entry. The eligible candidates are required to forward their application directly to IHQ MoD (N)/ DMPR through DGNCC. The candidates are deputed for SSB interview. After qualifying SSB these candidates undergo medical examination and if found fit, are inducted in the Indian Navy on the basis of All India Merit. The training of officers selected through this entry normally commences in the month of Jan/Jul every year.
(c) Direct Entry: The Direct entries are controlled by IHQ MoD (Navy) /DMPR and cater for both Permanent Commission (PC) and Short Service Commission (SSC). Advertisements calling for application from eligible candidates for such entries are published in the leading newspapers and Employment News twice in a year between Feb to May and Aug to Nov. The applications are received and candidates are shortlisted for SSB based on cut off decided by IHQ MoD (Navy)/ DMPR. The SSB qualified candidates undergo medical examination and if found fit, are inducted in the Indian Navy on the basis of All India Merit.

The government sector provides numerous job opportunities for these professionals. The qualified candidates can take part in the competitive examinations carried out by UPSC or State PSCs for different jobs. The candidates clearing these examinations will be posted to various departments of government services in related fields. They can also appear for the examinations organized by SSC, Defence sectors, railway departments, public sector banks, etc.
Some of the central government sectors where these professionals can find jobs are
Indian Railway under Signal Section
BSNL (Bharat Sanchar Nigam Limited)
ISRO (Indian Space Research Organization)
DRDO (Defense Research and Development Organization)
ECIL (Electronic Cooperation of India Limited)
AAI (Airport Authority of India)
SAIL (Steel Authority of India)
RRB (Railway Recruitment Board)
UPSC (Union Public Service Commission)
CDS (Combined Defense Service)

Hello Renisha,
There is no special courses for motorman in Indian Railways, but you have to complete ITI degree from recognized technical board.
Your minimum qualification should be class 10th pass out from recognized board.
Age : 18-30 yrs
1) To become a motorman you have to apply for the competitive exam held for the job (whenever declared by any of the 17 RRB'S of different zones in Indian railway)
2) The required training is given after clearing the exam
3) You will be posted as a assistance loco pilot first on goods train then passenger train and at last express train.
4) After few years of experience you will be appointed as a loco pilot.

Private banks now a days demand MBA with good marks.
Also, it includes good personality.
But for government banks procedure is little different. Clearing entrance examination is must for getting government jobs. Entrance exam which consists of question related to:
Quantitative aptitude
English
Reasoning
General awareness
Computers
It is difficult to clear exam without preparation.
But after preparation, you can clear the exam.
For apply in these examination, you have to be:
Graduate from recognised university around 50% marks.
age-between 21 to 28.
govt time to time publish their vacancy in employment newspaper (comes weekly)and other newspapers.
read them regularly.