Aptitude test will be online then after drawing test will be conducted on paper i.e. offilne
try on resonance's website, answer key of set R is there.
Staedtler pencils are excellent. why you want to go for a different brand? any specific reason?
you can use the given 90 mins according to your wish. you can experience the interface of nata exam here https://g21.digialm.com//OnlineAssessment/[email protected]@M1