Dear Aspirant,

JEE exam is conducted by National Testing Academy (NTA) twice a year. It is conducted  to students, who wants to pursue their Engineering courses in Highly reputed and top Most famous NIT's And IIT's In India. From the past few years, the examinations are conducted through online mode in CBT format.

Computer Based Test (CBT) or online exam is a test which is conducted over the internet. Before the start of the exam the candidates are requested to read few instructions where  few specific rules are given related to the exam.

For pattern and more details on the Exam, please refer the below link which will help you to understand further.

https://engineering.careers360.com/articles/how-jee-online-exam-conducted

All The Best!!!