GRE Mock Tests Needed

I have done my graduation in Mechanical Engineering. But I look to do Masters in Data Science related courses. Which courses and universities should I look for?

Since pure Data Science courses will hard to get admit into because of my background not related to the field

University groups

Is there a whatsapp or telegram group for Illinois Institute of Technology, Chicago - Data Science

Why having a credit card is important in the USA ?

The advantages of having a credit card are dependent on what your credit scores are in the USA. Credit scores can be any

Do Professional LOR’s require any stamp from the company?

Do we need to get the lor sealed / stamped or is it not required and can we submit a pdf?