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Hi,
Hacking institutes in Tamil Nadu-
CMS Computer Institute
RJP Infotek Pvt. Ltd.
IICT CHROMEPET
Appin Technology Lab
Onix Academy
For more, refer- https://it.shiksha.com/ethical-hacking-courses-in-tamil-nadu-categorypage-10-109-1-0-0-1-123-2-0-none-1-0
Also you have not mentioned your academic details, however a degree program is essential in either of the following-
Computer Applications
Computer Science
Information Technology
Information Systems
To add on, for being a professional ethical hacker you require motivation, dedication, initiative, self-education and formal training in ethical hacking. I would like to suggest a few points:-
1. Know about the different types of hackers, such as White Hat, Grey Hat and Black Hat hackers
2. Evaluate your strengths and interests and gain some programming knowledge such as C, or Java.
3. Learn the UNIX operating system as it is regarded as the original operating system built by hackers.
Explore the links below for scope in Ethical Hacking-
https://www.shiksha.com/ethical-hackers-the-data-protectors-article-3406-1
https://www.shiksha.com/ethical-hacking-do-you-want-to-join-the-online-cops-brigade-article-3212-1
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Mechatronics is a design process that includes a combination of mechanical engineering, electrical engineering, control engineering and computer engineering.It is a multidisciplinary field of engineering.Originally, mechatronics just included the combination of mechanics and electronics, hence the word is a combination of mechanics and electronics; however, as technical systems have become more and more complex the word has been "updated" during recent years to include more technical areas.
There are universities like MIT, LPU, SRM etc that are offering this degree. They offer direct admission as well as scholarships to meritorious students.
Good luck.