GRE

Hi, 310 is a decent GRE score. Apart from that you must also check your academic averages, your overall profile will be evaluated, your project work, extracurricular activities, SOP, LORs, etc. Different universities have different requirements so shortlist accordingly.

Your GRE score looks good, but if you have 10 backlogs then probably engineering is not a good choice for you. You might be good at many other things, but certainly not engineering. Why do you want to pursue engineering only? There are many other higher education options in Canada which you can pursue. Also, most of the good universities won't consider you unless you give them a "passed" transcript for all subjects and semesters. I'm talking about good universities. If you really have some good projects and high quality work experience you can give it a try though.

The word best is very subjective. The individual needs vary from person to person. You have to see which institute suits your need the best!
There are a few popular ones in Bangalore such as Crackverbal and GREdge. I would recommend you to attend free workshops and Demo classes organised by these Coaching centers and see which one you like the most.
Some of the factors to keep in mind would be the Teaching Methodology, Quality of Faculty, Support Options, Course Fee and the Test Series they offer.

Take GRE exam while looking up for colleges abroad. You'll definitely find great colleges abroad. Good GRE score will help you to get admission in a reputed college abroad.

Hi,
Unfortunately, no. You may get considered for a scholarship if you are bright, a full scholarship if you are extraordinary.

Hi Mallikarjun,
Scholarships to study abroad are given by the universities on merit basis. Your application will be considered by default when you apply and if you have a very good profile you will have good chances. A very high GRE score will of course help.

Hi,
GRE scores are not mandatory for all Canadian universities. I will advice you to do some proper research at your end first, please visit university websites and have an idea about the admission requirements. If at all you take the GRE you are adviced to score 315 and above and nothing less. About the academics, nothing less than 75% is accepted if you are aiming for the top universities. You can be considered with lower grades if your overall profile is very strong.

Yes, but not too many. If you are a domestic applicant check with the universities directly and prefer for the national entrances instead.

Hi Kunal,
A GRE score of 315 and above is strongly recommended.

Hi,
There is no eligibility attached with these exams. Also, you need not to take all of them. GMAT or GRE and TOEFL or IELTS. Aim for these scores:
GMAT -710 and above
GRE -315 and above
TOEFL - 100
IELTS - 6.5