Hi Nishant
I am answering the last question, which according to you is Microsoft Favourite, because it has a logical answer; leaving the other questions - where there may not be any right answer; to be answered by other members.
Manhole covers are round; to prevent them from falling into the hole, inadvertently. You'll notice that a circle has equal diameter, measured from any point on its circumference; hence if the rim of cover is even slightly larger than the hole, it will not fall inside.
Whereas, since in a square or rectangle, the diagonal is much larger than any of its side, one will need a very large rim around a square or rectangular cover, to prevent it being twisted and dropped inside the hole.
Hope, it helps interviewees.
Regards.
I am answering the last question, which according to you is Microsoft Favourite, because it has a logical answer; leaving the other questions - where there may not be any right answer; to be answered by other members.
Manhole covers are round; to prevent them from falling into the hole, inadvertently. You'll notice that a circle has equal diameter, measured from any point on its circumference; hence if the rim of cover is even slightly larger than the hole, it will not fall inside.
Whereas, since in a square or rectangle, the diagonal is much larger than any of its side, one will need a very large rim around a square or rectangular cover, to prevent it being twisted and dropped inside the hole.
Hope, it helps interviewees.
Regards.