Diploma

Please specify the college name where you plan to apply, accordingly I'll be able to tell you about affiliation.

Your Diploma in Computer has nothing to do with The Hariom. Direction diploma and if you complete it even, it is not the eligibility for that. Please check their website and see answers on Shiksha given.

If the Diploma is a PG Diploma, then Lateral entry is generally allowed. But in case a mere Diploma, you should be a graduate to do a PG degree then. Besides, you can check with the institution.

Yes, admissions are based on entrance exam.
Refer this link for more information.
https://www.shiksha.com/design/fashion-design/course/diploma-in-apparel-manufacture-and-design-premlila-vithaldas-polytechnic-pvp-mumbai-santacruz-west-92761

You can get all the details through the below link and you can also download their brochure for getting course details on Eligibility, Fees & Important Dates, etc.
https://www.shiksha.com/aviation/course/basic-diploma-in-air-ticketing-bangalore-aviation-academy-m-g-road-287894

Hello Manish Kumar,
The information available on the website of National Dairy Research Institute is unfortunately not updated recently. But it does not talk of possibility of lateral admission. Hence I am afraid that scope of lateral admission is not there. But if your state govt accepts diploma as

Eligibility Criteria for Admission :
Candidate must be a M.Sc Electronics/ B.Sc Electronics/ B.E/ B.Tech in Bio Medical / Electronics/ Electrical/ Electronics & Communications/ Instrumentation graduate or Diploma in Electronics/ Medical Electronics/ Electrical/ Instrumentation from a recognized unive