Are Harvard online courses valid?

Yes, Ratan Tata attended Harvard University. In 1975, he attended Harvard's Business School's Advancement Management Program. There is one hall dedicated to him at Harvard, known as Tata Hall. It was opened in 2013 and extended and expanded the Exceutive Education at HBS. 

At present, 24,519 students are there at Harvard University. More than 6,700 students are international at Harvard. Many international students were enrolled Harvard College and GSAS almost 1,000+. Over the last 5 years, the total student enrollment at Harvard has remained over 20,000+. Being one of the selective universities in the world, the acceptance rate of Harvard is around 3.6%. 

You would need to do well in your academics to get into either. At Columbia however, you have better chances of admission. Columbia accepts applications at a rate of 4.3%. Harvard, on the other hand, does so at a rate of 3.6%.

Yes, current F1 students can work part-time on campus for up to 20 hours per week at the time of classes. They can work full-time at the time of vacations. Some of the popular part-time jobs in the US are: 

• Tour Guide
• Campus Tech Support
• Teaching Assistant
• Barista
• Campus Tech Support 

The median base salary of Harvard MBA graduate is around USD 184,500 (Around INR 1.65 Cr). and the median signing bonus is USD 30,000. For the Class of 2025, the placement rate is 84% (received an offer). Some of the job functions on which the graduates of this university have been employed are Consulting, Business Development, Marketing, General Management, etc.