If my interviewer ask me the same question, i think ill answer:

Your company is looking for a cow. That interviewer must be a bull, and the entire company must be a zoo.

Then walk to the door, open up then say, "let your horse come.". Then go home, tell your parent, u just went to jurasic park.

firstly, if you wanna get hired for the job, answer all the stupid question for the company's best resort, means like gosok kasut the company. sell yourself or wat so ever, in my point of view, not all the quietions thats bombard to you really required for you to perform , for example, if they ask you that wheter you can tahan mati, say yes, if that what it takes to get you hired for the job, coz in the end of the day, they wont really required you to work 24 hours for 2 weeks, because thats simply IMPOSSIBLE!!!

those question are not stupid, but more of a psycohlogical quietion in which the interviewer look at how well you can answer their quetions.

than after you get hired, then only you decide what to do next, if they really want you to work 24 hour for 2 weeks, report to the labour union coz they are abusing you.

and about the dressing, make the best for your 1st impression, cos you dont get 2nd chance to impress them.

Answer back : you think i robot no need sleep one ar ?

go for more interview.and buy some book about how to ace the interview.Yes,u r a product wanting the buyer to buy u..u must know ur personal asset well,and sell urself,and let the interviewer know y u r the one
About the r u tahan mati or not..i agree it is indeed a stupid question,i wont take that company offer too if i got it.They can ask"are u able to work under pressure or slightly longer working hour?" wat tahan mati la..is abit no standard for the interviewer which shows he/she also is not really that on par..
go for more interview..u get experience