Diploma

Yes, there are many jobs in Event management:
https://www.shiksha.com/hospitality-travel/event-management-chp

NIFT doesn't provide any Diploma courses all you have the degree courses to choose from. Courses provided by NIFT:
Undergraduate (UG) Programs
Bachelor of Design (B. Des) Bachelor of Fashion Technology (B. F. Tech ). Postgraduate (PG) Programs
Master of Design (M. Des) Master of Fashion Technology (M. F. Tech). Master of Fashion Management (M. F. M).

Students are required to visit the college in person with all the documents required such as Class 10th Mark Sheet, Certificate, ID proof and Photographs at the time of admission.

Yes,
You are definitely eligible for the PG Diploma in Direction and Screenplay Writing as the minimum eligibility criteria includes the candidate needs to have a graduation in the respective specialization or equivalent from a recognized University.

It is best, if you go for a undergraduate programme in Textile technology. Be it BA/B.Sc/B.Tech in Textile tech. Though, it is hard to find colleges offering UG courses under correspondence, so I would advise you to go for full time classes. For distant course details, you can follow this link. https://www.shiksha.com/b-tech/colleges/distance-correspondence-b-tech-in-textile-engineering-colleges-india.

The minimum qualification required for admission into a diploma course is passing of the Secondary School Leaving Certificate (SSLC)/tenth standard/equivalent examination, with at least 35 percent in science and Maths subjects. The state boards of technical education of most of the states in India conduct entrance tests.
The percentage is decided according to the course also choosing for the Diploma.

Various colleges are providing PG Diploma in Interior design such as: Bhavy Shimla School of Design
Gurgaon, GD Goenka University - GDGU, Gurugoan
School of Design and Visual Arts, Apeejay Stya University, Gurugoan
These are some best options to go.

This is the maximum information I can give you, hope it helps
https://www.shiksha.com/college/tritya-maritime-academy-tma-lajpat-nagar-delhi-56077?rf=searchWidget&landing=ilp

Hi,
Diploma in Fashion Design is a 1-year Diploma course, the minimum eligibility is 10+2 or its equivalent exam. Admission to Diploma in Fashion Design course depends on the basis of candidate's performance in a relevant entrance exam, and subsequent round of counselling. I hope you find it helpful, please feel free to ask any query.