Australia

Let me ask you, what kind of a job are you looking for?
Do you intend to pursue your career in engineering or planning to shift?
What are your interests?
The answer to these questions itself will help you decide which course you need to look out for. It is important you know what you want, figure out your own interests and career goals, check various job profiles, career outcomes and see what interests you.

As per my knowledge, GRE is not required to get admission in Australian Universities. However, IELTS or TOEFL percentage is required.
1. IELTS: Minimum of 6 in each section and overall of 6.5 band.
2. TOEFL: Minimum of 23 in each section.
3. GMAT is required by some universities for the MBA program.
Although, I would suggest you to check the requirements of the university in which you are interested.

I think, you are looking for under graduation abroad. The two above mentioned countries are very magnificent for Indian students as there is large majority of Indians already present there. If you want to choose between Australia and Canada, I would suggest you to go for Canada as there are lots of scholarships for international students and the quality of education is better than Australia.
Best of luck.

Just work there and learn various things related to HR. Gain some experience and then apply for core HR jobs in MNCs. If you work for atleast 1 year in a consultancy, after that you will get better options. After gaining some experience then you can give IELTS exam to get job in Canada or US. First you should have experience of 2 to 3 years and try to get a job in MNCs.

Yes, It's an amazing university for sure and the course you are thinking to pursue in Australia also will help you to glow up your career.

Hi Nikhil,
You must be accepted by the University to be eligible for the international undergraduate scholarship. These are merit-based scholarships so you must have had an excellent academic background with no backlogs. Read more here
https://studenteforms.app.unimelb.edu.au/apex/f?p=153:2:0:2:P2_ID:283

The University of Melbourne is Ausralia's top ranked business school, also known worldwide.

MCA only available in India. In abroad, there is only M.Sc in CS course available.

Yes, but you need to know about the admission process of different countries. If you want to study your Master's in USA, you need to give GRE and TOEFL. If you want to pursue your Master's in other specified countries, then you must give IELTS or TOEFL and must maintain a good CGPA in your Bachelor's degree.
I hope it helps.