Labs247 Interview Question for Quality Assurance Engineers


Country: India
Interview Type: In-Person




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4
of 4 vote

Person C was wearing a Black Cap.

- Anonymous June 29, 2012 | Flag Reply
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0
of 0 votes

You are absolutely right... Black Cap

- XYZ June 29, 2012 | Flag
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0
of 0 votes

yes C is wearing black..

- Anonymous June 29, 2012 | Flag
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0
of 0 votes

Can you explain why

- anonymous June 29, 2012 | Flag
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0
of 0 votes

When A said he doesn't know :
-> botch B and C are not wearing white.

When B saw C, if C had a white cap B would have answered black because from A's answer both B and C were sure both of them are not wearing white cap.
So when B said he doesn't know C was sure he was wearing a black cap.

- Avi June 29, 2012 | Flag
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0
of 0 votes

C was wearing a black cap!

- stalin July 12, 2012 | Flag
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0
of 0 votes

it is black.

- Kishan August 10, 2012 | Flag
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3
of 5 vote

When A says he doesn't know it means that he doesn't see two white caps. That means he sees
1. Two black caps
OR
2. One white cap and one black cap

In that context B knows that he's wearing a black cap if he sees C wearing a white cap. If B were to see C wearing a black cap he (B) wouldn't know the color of his cap. That is based on implications from A's answer.

Since B says he doesn't know the color of his cap it means that C wears a black cap.

- gcristea June 29, 2012 | Flag Reply
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0
of 2 vote

When A said he doesnt know he means that the two guys infront of him are wearing black caps. As there are three black caps he could be wearing either black or white.
Is my logic correct?

- lewis_therin June 29, 2012 | Flag Reply
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0
of 0 votes

may be one of them was wearing black and the other was wearing white

- Avi June 29, 2012 | Flag
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0
of 0 vote

A B C
----------------
B B B
B B W - Ruled Out By B in Step 2.
B W B
B W W-{ Step 1:A's Turn: Decision1 : if this was the case . A would have said he is
wearing While, so this wasn't case, this option is ruled out , B can use this fact
when he makes a decision }
W B B { Step 2: B's Turn: When ever C is wearing White B is wearing Black, B would
have said he is wearing Block If C is wearing White , But this wasn't the case ,
therefore option 2 and option 6 is ruled out }
W B W
W W B - Ruled Out by B in Step 2.

Step 3: C knows that B wasnt able to answer , the only case where he wont be able to answer is when C is wearing a Black. Hence the answer ... C is wearing Black

- KrishKrish July 12, 2012 | Flag Reply
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0
of 0 vote

doesnot ake more than 2 min.

- Anonymous July 27, 2012 | Flag Reply
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0
of 0 vote

black cap......!!

- Anshul September 11, 2012 | Flag Reply
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0
of 0 vote

I don't see any cap .....

- Vikash jha December 07, 2016 | Flag Reply
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0
of 0 vote

I have some cap questions and ask you later...

- unnikrishnanmanimunda May 09, 2018 | Flag Reply
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0
of 0 vote
{{{ i have some cap questions and ask you later..}} - unnikrishnanmanimunda May 09, 2018 | Flag Reply
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0
of 0 vote

The question assumes all of them dont lie !!!

- Bineesh Kumar May 11, 2019 | Flag Reply
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0
of 0 vote

It might be possible that A didn't answer because A saw that both B and C were having Black caps.

- Ishan Jain September 24, 2019 | Flag Reply
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0
of 0 vote

This is same as C is blind, but A and B can both 'see' each other and C and colours are pinned to their backs.

- ppheanix February 09, 2020 | Flag Reply


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