Germany

The eligibility criteria for MS differ in different universities. General eligibility criteria to study it in German University is as follows:
(a) High academics performance or records in undergraduate studies.
(b) If the course is taught in German, then proof of proficiency in the German Language. If the course is taught in English, then proof of proficiency in English by TOEFL or IELTS score.
(c) Some universities require GRE score
(d) With relevant work experience in the field of further study, chances of selection increases
(e) Demonstration of technical ability through project execution, participation in the technical symposium, conference, etc.
(f) Recommendations letters from internationally known faculty from where you have completed your graduation.

Hi Anirudh,
To study from US you must take your GRE. IELTS or TOEFL is an additional requirement for international students. You may consider learning German language if you desire to study in Germany for better prospects. Your profile seems good though you haven't specified your academic profile. Have clarity over your career plans, you have to convince the university why marketing or why entrepreneurship or why business management through your statement of purpose and personal interviews at a later stage. Every university has different admission requirements, it is recommended you check university websites for the entry requirements and prepare accordingly.