Hello Akshay,
For diploma holders as well as students who have completed 10+2 admission in Zakir Hussain College of Engineering is through the entrance test - AMUEE (Aligarh Muslim University Entrance Exam) which is a 150 marks paper divided into three sections - Physics, Chemistry and Mathematics.
For further information on admission and for the online application form, here is a link to the admissions page of the official AMU website - https://www.amucontrollerexams.com/page/view/general-admission-1550578415
I hope this helps you, good luck!! :)
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