IIIT Hyderabad takes the admission through the channels like JEE Main, Undergraduate Engineering Entrance Examination - UGEE– CSD/ ECD/ CND/ CLD/ NK/ NTSE or KVPY, Olympiad, Direct Admissions for Students Abroad (DASA) and Special Channel of Admission (SPEC).

JEE Main Mode- IIIT Hyderabad B.Tech Admission will be done based on JEE Main marks for limited seats to the single degree programmes only. These programmes includes, B. Tech. in Electronics and Communication Engineering (ECE), and B. Tech in Computer Science and Engineering (CSE).

DASA Mode: Through this channel candidates living in abroad will get direct admission based on DASA. 

UGEE Mode: Through this mode, admission to all research-based dual-degree programmes will be done. What candidates need to know is that admission in through this mode will be based on an entrance examination followed by an interview.

Special Channel of Admission (SCA) Mode: This mode has been introduced in 2018 only. Through this channel candidates get admission to single degree B. Tech. (ECE/CSE) programs. The admission through this you need to appear and qualify an entrance examination and interview. 

Every channel have a separate application procedure.

You can also prefer the below given link for the further information.

https://engineering.careers360.com/articles/iiit-hyderabad-btech-admission

Good Luck!