Which would be a better choice amongst these two

University groups

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

Iam planning for ms in data science and analytics in US

Iam planning for ms in data science and analytics in US please help me to choose universities from below UMBC UMASS UNIV

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?

I'm a fresh Graduate with an Undergraduate Degree in Business Administration. I do not have substantial work ex but have internship experience in Marketing. I have admits from US universities for MS in Marketing (STEM).

Is it ok to go for a 1 year MS Degree? Would it affect my job prospects?