What is the system of minors, honours and double majors in IIT Hyderabad? How does it work?

My brother is a double major student at IIT Hyderabad and praises this system a lot. Under this system, you can earn an additional degree in your branch of interest. There are 3 options 

• Double Major/Additional Major: This system enables you to have an additional major in a branch other than your main branch. All you need to do is complete a minimum of 24 credits in that branch. It’s important to note that if you get an FR in 3 or more credits, then your major will be automatically dropped.
• Minor: This too allows an extra degree in another branch of your choice apart from your primary branch. However, in this, you complete 12 credits and earn a minor degree.
• Honors: Under this, you complete extra 12 credits advance courses in the same branch.

This fractal system enables us to explore other branches and pursue your interest also.