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When you have 80% marks and above you will get admission in any foreign universities.
You need to do IELTS because it is to prove your English proficiency.
In this you have to write four papers as Reading, Writing, listening and Speaking.
As this exam is a global one and it is to gauge your level to compare in the global level, it is better for you to take some good coaching and then write the exam. You will be given good scholarships by British council if you take good score of Band 8 and above. If you need coaching through skype you see www.mizpah.in or search for a good coaching center and take coaching and then write the exam.
GRE is not necessary for many universities. After you select the university you check up in their website about the requirements. Only if they ask then you take coaching and write.

Hi Rajasekhar,
Before seeking admission in any institute, kindly check the below mentioned parameters such as affiliation, accreditation, fee structure, curriculum, infrastructure, placement, faculty, admission procedure etc.
Here is the list of some good institutes offering Ph.D. in Mechanical Engineering:
Delhi Technological University
Veermata Jijabai Technological Institute, Mumbai
M S Ramaiah University of Applied Sciences, Bangalore
Institute of Chemical Technology, Mumbai
Dwarkadas J. Sanghvi College of Engineering, Mumbai
Lingaya's University, Faridabad
Refer to the below link to know about more institutes offering Ph.D. in Mechanical Engineering:
https://engineering.shiksha.com/phd-in-mechanical-in-india-categorypage-2-68-680-0-0-1-1-2-0-none-1-0?
Refine the search as per your state preference.
Hope this helps,
If you like this answer rate it as the best answer.
Thanks.
All The Best!

Hi Vaibhav,
Master in Science in IT (MSc IT)
Master of Science in information technology (MSc IT) is a 2 year postgraduate degree program designed mainly to produce technically competent, self motivated and highly productive professionals to meet the growing demand of an ever changing market of the global IT industry.
This course is a professional qualification in IT, which grooms not only IT professionals, but also experts from other domains providing a unique and comprehensive programme.
This program is unique and flexible which allows graduates to build a satisfying career in the challenging field of IT.
Career prospects after completing M.Sc IT:
Software Engineer
Computer Programmer
Interface Engineer
Java Developer
Project Manager
Information Security Analyst
IT Consultant
Network Administrator
Here is the list of some good institutes offering M.Sc IT in Hyderabad:
University College of Engineering
Tally Institute of Learning (Authorised Institute from Tally Bengaluru)
ECIL(Electronics Corporation of India Limited)
Mahatma Gandhi University (MGU)
A P State Council of Higher Education
Refer to the below link to know about more institutes offering M.Sc IT:
https://it.shiksha.com/msc-it-colleges-in-hyderabad-categorypage-10-98-49-0-0-702-100-2-0-none-1-0
Refine the search as per your state preference.
Hope this helps,
If you like this answer rate it as the best answer.
Thanks.
All the best!