GMAT

If you want to go in good B-School then it is must to give the above mentioned examinations.

Hi Hartej,
Here is the list:
The official guide for GMAT review:
Kaplan GMAT Prep
Manhattan GMAT Prep
and cracking the GMAT by Princeton review.

Hi Sonali,
Not at all, GMAT is basically required for MBA programs. It's not required for each and every Master's degree course abroad.

You don't have any chance of getting admission in a good college. Stanford's cut-off is 740 and Wharton's is 728.
However, if your aim is just to get MBA at any cost then IIPM, Manav Rachna and Manav Bharti are the kind of institutes which exist in the USA who can't provide you placements, but they badly need students so you can search and apply for such B or C category institutes.

Hi Harman,
The download is not available for this book. Please buy. Check
http://www.mba.com/india/store/store-catalog/gmat-preparation/the-official-guide-for-gmat-review-2017.aspx
You can download the GMAT preparation software instead:
http://www.mba.com/india/the-gmat-exam/prepare-for-the-gmat-exam/test-prep-materials/free-gmat-prep-software

Hi Anuj,
Yes, it will be considered as work experience. You must prove or demonstrate your contribution to the business, its growth and your role in it. The nature of your involvement will be evaluated.

Hi,
The following answers should help.
https://ask.shiksha.com/which-is-the-best-book-for-preparation-for-gmat-qna-2322348
https://ask.shiksha.com/which-are-the-best-books-to-prepare-for-gmat-qna-3738652

English speaking skills is important for admission as some universities also prefer admission on the basis of work experience.

No, entrance exams are a must to secure admission in any of the college.