Wat are your answers....

[speedy250kmph]

I Wud post some Indian Civil Services Interview Questions here....

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0. Classic: If a bear walks one mile south, turns left and walks
one mile to the east and then turns left again and walks one mile
north and arrives at its original position, what is the color of the
bear.

ANS. The color of the bear is trivial. The possible solutions to it
are interesting. In addition to the trivial north pole, there are
additional circles near south pole. Think it out.

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* 1. Given a rectangular (cuboidal for the puritans) cake with a
rectangular piece removed (any size or orientation), how would you
cut the remainder of the cake into two equal halves with one
straight cut of a knife?

ANS. Join the centers of the original and the removed rectangle. It
works for cuboids too! BTW, You must be thinking why a horizontal slice across the middle will not do. Please
note the "any size or orientation" in the question! Don't get boxed
in by the way you cut your birthday cake Think out of the box.

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2. There are 3 baskets. one of them have apples, one has oranges
only and the other has mixture of apples and oranges. The labels on
their baskets always lie. (i.e. if the label says oranges, you are
sure that it doesn't have oranges only,it could be a mixture) The
task is to pick one basket and pick only one fruit from it and then
correctly label all the three baskets.

HINT. There are only two combinations of distributions in which ALL
the baskets have wrong labels. By picking a fruit from the one
labeled MIXTURE, it is possible to tell what the other two baskets
have.

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3. You have 8 balls. One of them is defective and weighs less than
others. You have a balance to measure balls against each other. In 2
weighings how do you find the defective one?

ANS. Take 3 and 3 balls in each of balance and keep other 2 aside.If
there is any defective ball in 3 balls either there will be
unbalance.if so take those 3 balls aside which has no defective
ball.Then keep 1 ball from the 3 balls in which there is a
defective aside and weigh other 2.If there is defective in them
there will be unbalance otherwise the remaining kept aside will be
defective.If neither of 3 balls combination has defective ball then
weigh the remaining which kept initially aside.

4. Why is a manhole cover round?

HINT. The diagonal of a square hole is larger than the side of a
cover!

Alternate answers: 1. Round covers can be transported by one person,
because they can be rolled on their edge. 2. A round cover doesn't
need to be rotated to fit over a hole.

5. How many cars are there in the USA?

6. You've got someone working for you for seven days and a gold bar
to pay them. The gold bar is segmented into seven connected pieces.
You must give them a piece of gold at the end of every day. If you
are only allowed to make two breaks in the gold bar, how do you pay
your worker?

ANS counting bar segments from left to right
from 1 to 7.break the gold bar at 3 position then u will get 2(1,2),1
(3),4(4,5,6,7) combination gold bar and break at middle in 4 segment
(4,5,6,7)in middle so that there will be 2 segment combination(4,5)
and (6,7)
at 1st day the owner gives 1 the 2nd day he gives 2 and takes 1 and
3rd day he gives 1,4th day he gives 2 and takes 1,5th day he gives
1,6th day he gives 2 and takes 1 and 7th day he gives 1
NOTE:THIS CAN ALSO BE DONE BY BREAKING ONCE
FOR THIS DO'T BREAK 2 TIME AND REPEAT THE PROCESS AS SAME


7. One train leaves Los Angeles at 15mph heading for New York.
Another train leaves from New York at 20mph heading for Los Angeles
on the same track. If a bird, flying at 25mph, leaves from Los
Angeles at the same time as the train and flies back and forth
between the two trains until they collide, how far will the bird
have traveled?

HINT. Think relative speed of the trains.

8. You have two jars, 50 red marbles and 50 blue marbles. A jar will
be picked at random, and then a marble will be picked from the jar.
Placing all of the marbles in the jars, how can you maximize the
chances of a red marble being picked? What are the exact odds of
getting a red marble using your scheme?

9. Imagine you are standing in front of a mirror, facing it. Raise
your left hand. Raise your right hand. Look at your reflection. When
you raise your left hand your reflection raises what appears to be
his right hand. But when you tilt your head up, your reflection does
too, and does not appear to tilt his/her head down. Why is it that
the mirror appears to reverse left and right, but not up and down?

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10. You have 5 jars of pills. Each pill weighs 10 gram, except for
contaminated pills contained in one jar, where each pill weighs 9
gm. Given a scale, how could you tell which jar had the contaminated
pills in just one measurement?

ANS. 1. Mark the jars with numbers 1, 2, 3, 4, and 5.
2. Take 1 pill from jar 1, take 2 pills from jar 2, take 3 pills
from jar 3, take 4 pills from jar 4 and take 5 pills from jar 5.
3. Put all of them on the scale at once and take the measurement.
4. Now, subtract the measurement from 150 ( 1*10 + 2*10 + 3*10 +
4*10 + 5*10)
5. The result will give you the jar number which has contaminated
pill.

11. If you had an infinite supply of water and a 5 quart and 3 quart
pail, how would you measure exactly 4 quarts?

12. You have a bucket of jelly beans. Some are red, some are blue,
and some green. With your eyes closed, pick out 2 of a like color.
How many do you have to grab to be sure you have 2 of the same?

13. Which way should the key turn in a car door to unlock it?

14. If you could remove any of the 50 states, which state would it
be and why?

15. There are four dogs/ants/people at four corners of a square of
unit distance. At the same instant all of them start running with
unit speed towards the person on their clockwise direction and will
always run towards that target. How long does it take for them to
meet and where?

HINT. They will meet in the center and the distance covered by them
is independent of the path they actually take (a spiral).

16. (from Tara Hovel) A helicopter drops two trains, each on a
parachute, onto a straight infinite railway line. There is an
undefined distance between the two trains. Each faces the same
direction, and upon landing, the parachute attached to each train
falls to the ground next to the train and detaches. Each train has a
microchip that controls its motion. The chips are identical. There
is no way for the trains to know where they are. You need to write
the code in the chip to make the trains bump into each other. Each
line of code takes a single clock cycle to execute.
You can use the following commands (and only these);
MF - moves the train forward
MB - moves the train backward
IF (P) - conditional that's satisfied if the train is next to a
parachute. There is no "then" to this IF statement.
GOTO

ANS.
A: MF
IF (P)
GOTO B
GOTO A
-----
B: MF
GOTO B
Explanation: The first line simply gets them off the parachutes. You
need to get the trains off their parachutes so the back train can
find the front train's parachute, creating a special condition that
will allow it to break out of the code they both have to follow
initially. They both loop through A: until the back train finds the
front train's parachute, at which point it goes to B: and gets stuck
in that loop. The front train still hasn't found a parachute, so it
keeps in the A loop. Because each line of code takes a "clock cycle"
to execute, it takes longer to execute the A loop than the B loop,
therefore the back train (running in the B loop) will catch up to
the front train.