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Dear Dinesh,
Well both the streams require Maths. However, as far as scope is concerned, I have mentioned about it below
*Computer Science*:
Computer Science Engineering is a division of engineering which involves the principles and techniques of both computer science and electronics engineering. It includes testing and designing of computer components.
Some of its specialized fields are: -
Networking
Game Systems
Customer service
Database systems
Embedded systems
Operating systems
Computer Validation
Software engineering etc.
Scope:
The rapid growth of information technology has made computer industry, one of the fastest growing segments. Because of it, there is a huge demand for computer engineering professionals for the development of faster hardware components, new communication systems and software. Computer Engineers with a high percentage of mark and good communication skills can be simply employed in top companies. Software and IT companies are the major employers of these graduates. Some of the top companies such as Microsoft, Google, HCL, Infosys, Wipro, TCS and Mahindra offer a very high salary package.
*Electronics and Communication*
Electronics and Communication Engineering opens up great career prospects for the students. The students after completion of the degree can easily avail job opportunities in manufacturing industries and service organizations such as broadcasting, consulting, data communication, entertainment, research and development; and system support.
After completing graduation, one can find gainful employment in variety of sectors such as Indian Telephone Industries, Civil Aviation, Development Centers in various States, Defense, NPL, A.I.R, Posts and Telegraph Department, Railways, Bharat Electronics Limited, D.R.D.O, Telecommunication, Software Engineering/IT, Power sector, Hardware Manufacturing, Home Appliance and VLSI design, Television Industry and Research & Development.
Some job titles:-
Service Engineer
Software Analyst
Technical Director
Field Test Engineer
Senior Sales Manager
Network Planning Engineer
Customer Support Engineer
Electronics and Communications Consultant
Research & Development Software Engineer
For more, I would request Himal Prasad Ghimiray to share his expertise.
Thanks
All The Best!

Hi Shubham,
Keeping in mind this year JEE (Main) paper analysis, last year cut offs and only your JEE Main marks (boards not included), you can expect a rank above 120000+
To calculate your JEE Main rank, you can refer to the below articles
https://www.shiksha.com/jee-main-2014-rank-predictor-how-to-calculate-ranks-and-scores-article-7711-1
https://www.shiksha.com/jee-main-2014-rank-predictor-understanding-percentile-and-normalization-of-class-12th-board-marks-article-7710-1
https://www.shiksha.com/jee-main-2014-rank-predictor-how-to-map-scores-to-ranks-article-7713-1
For the list of institutes, you can refer to shiksha college predictor
https://www.shiksha.com/jee-mains-college-predictor
All The Best.!