USA

Dear Manish,
Scholarships are always given on merit-basis, which means it is competitive and awarded to students with an outstanding profile. US Universities are quite generous, when it comes to financial grants and scholarships. To be strongly considered for one, you need a good profile which comprises a brilliant academic track record and substantial extra-curricular activities.
In addition, you will also require a very good GRE score. A small thing to remember here, there is no single criteria when it comes to US, you need to remember that they look for an overall healthy profile. If you do have an average track record, you may be considered for scholarships and admissions if your extra-curricular is strong.

After completing the studies, graduates of nursing can go for M.Sc nursing. There are lots of specialized areas for a person to train. A few of them are:
1. Community health.
2. Medical-surgical.
3. Pediatrics obstetrics and gynecology.
4. Psychiatry.
There are numerous nursing institutes in India that offer students with an assortment of nursing courses. The admission to these institutes is done on the basis of a student performance in written examination. Students who excel in the written test will be notified about a personal interview.
Some of the courses that are available in nursing comprise of:
1. Auxiliary nurse midwife/ health worker.
2. Educators.
3. General nursing and midwifery (GNM).
4. Hospital nursing.
5. Industrial nursing/ occupational health nursing.
6. Military nursing.
7. Orthopedic nursing.
8. Pediatric nursing.
9. Psychiatric nursing.
10. Public health nursing/ community health nursing.

Dear Sathiya,
Process and requirements vary. If you are looking forward to get into an American University, you must take the GRE and TOEFL to be considered for admissions. Universities in Europe do not seek any GRE scores, however might ask for one depending on your profile. Good essays, personal statements, letters of references are additional requirements and matters a lot. About your internship, if you are studying in a foreign university you can easily complete your internship from that particular country. Always look for universities having strong industrial tie-ups, co-op options, providing good career assistance etc.
Best of luck!

MIT, Georgia Tech, Cal Tech, University of California-Berkley, Cornell are some of top universities in USA. Which area of studies are you referring to?
Subject wise, certain universities are better ranked than the others. You may refer to ranking charts such as Times Higher Education Ranking, QS Ranking etc for more university standing.
An advice, since your GRE score is a little lower than the recommended score of 315, you must work hard on your application material such as the personal statement. Other factors affecting admissions include letters of recommendation and extra curricular activities. Remember, extra curricular is extremely important. Most importantly check the admission information and apply well ahead of the deadlines.