Hello Rohit,

For SCB, It is mandatory for the candidate to appear in IISER aptitude test. IISER Aptitude Test,  a computer based test (CBT), 3-hour multiple choice paper having 60 questions. As per the exam pattern 3 marks will be rewarded for every correct response and 1 mark will be deducted for every incorrect response.

You can check the complete detail with the given below link.

https://engineering.careers360.com/exams/iiser-aptitude-test

Good Luck!