Exam

You can study 1 to 2 hours on weekdays. On weekends, try to do 3–4 hours if possible. But no need to study whole day. Just be regular and serious.

Yes, 8 weeks is enough if you study every day. Just follow this TOEFL study plan, do some practice tests, and focus on your weak parts. Many students do it in 2 months.

The NATA exam is scheduled from 7 Mar to 28 Jun. Candidates are required to appear for the entrance in order to participate in the entrance-based admission process. Candidates are required to clear the cutoff set by Nehru School of Architecture to get invited for the next admission rounds. 
Candidates who clear the admission process are eligible to pay the course fee and secure their seat. 

Candidates seeking MBA admission at Rajagiri College of Social Sciences (RCSS) are required to submit the scores obtained in one of the accepted entrance exams. The college accepts the exam scores of three Management entrance exams. These exams are CAT, CMAT and KMAT. Candidates with a valid score in any one of these exams are eligible for MBA admission at the college. Hence, candidates can get admission at RCSS for an MBA without having to appear for CAT.

"Tough" isn't quite the right word; "tricky" is more accurate. The Decision Making questions are unique because they don't have a single, formula-based right answer. They present you with complex business and ethical dilemmas where all the options seem very close.

The real challenge is to pick the most logical and ethical course of action, which tests your managerial judgment under pressure. Excelling here is a huge advantage, as it demonstrates the exact kind of practical mindset that top B-schools like GIBS highly value in their future leaders. It's a direct test of your management potential.