I have been told by my grand father that one tricky question was asked in one interview.
A candidate was asked initially formal questions and finally he was asked how many stairs you climbed while coming to this hall. Such questions are asked to make the candidate alert in all respects.
I read in one book. A boy was searching jobs after his graduation. As he was in the house, his father used to ask him to not to keep books on the rack as rubbish, closing the water tap when the water is unnecessarily flowing, asked to switch off the fans and lights in the places where there was no persons etc., Annoyed this person keenly search for a job and decided himself to join in any job available. He went to one interview. He got into the company and found the security was not sitting in the place allotted to him and he asked him to sit there, switched off the fans and lights in the place where there was no persons found, asked the receptionist to keep the records in order on her table. Then he entered into the hall of interview. As he was last candidate,he sat patiently. Lastly he entered into the room of interview without any hope of getting job in that company. The panel asked him to sit and seen all his certificates. With smile the middle person told,'sir, actually the candidate has been filled for the job called for. But on seeing your activities after you enter into the office premises, we have decided to offer Administrative Officer post to you in our company. Please wait and collect your appointment order'. Immediately the candidate think about his father and thank him by heart.
(here we should note that the candidates should bear in the mind that not only mere questions on subject decides the selection)
some other tricky questions:
1. In which side the handle is located in a coffee cup? (The real answer is outside)
2.A candidate was offered coffee in the interview table and asked,'What is before you?'
The candidate replied as coffee, or coffee cup. But the correct answer is 'T'.