• Placement Questions

Frequently Asked Interview Questions and Answers

(#M40002963) CAT QUESTION Keep an EYE

What is the total number of ways of selecting twenty balls from an infinite number of blue, green and
yellow balls?
(a) 320 (b) 203 (c) 231 (d) 1771

Solution

the answer are wrong
no. of methods to find first ball = 3
similarly no. of methods for second ball = 3
so answer for selecting 20 balls = 3^20

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Asked In CAT Nitish Kumar (14 years ago)

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(#M40002962) SELF QUESTION Number Keep an EYE

This is a simple Number System Problem, posted under Placement Category

Let x, y and z be distinct integers. x and y are odd and positive, and z is even and positive. Which one of the following statements cannot be true?

1)(x-z)2 y is even 2)(x-z)y2 is odd 3) (x-z)y is odd 4)(x-y)2z is even

Solution

i think, in this question in options, 2 used is not multiplied number, it is square
so by checking first is (odd-even)^2 * odd = odd
but it is given even so it will be incorrect

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Ankit (14 years ago)

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(#M40002952) TCS QUESTION Keep an EYE

The citizens of planet Oz are 7 fingered and thus have developed an umber system in base 7 . A certain street in Oz contains 100 bvuildings numbered from 1 to 100. how many 3's are used in numbering thers buildings?

15

14

7

21

Solution

the ans is 14. any no from 1 to 100 comes 20 times.so if base is 7 then the maximium no can be 66. the no 37,38,39,73,83,93 will not be counted.and they have six 3's. so total 3's will 20-6=14.
This answer is given by ROHIT and is correct answer

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Asked In TCS Neelkamal Sharma (14 years ago)

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(#M40002950) TCS QUESTION Keep an EYE

There are two boxes, one containing 19 red balls and other containing 23 green balls. you are allowed to move the balls between the boxes so that when you choose a box at random and a ball at random from the chosen box, the probabilty of getting a red ball is maximized, This maximum probability is
.45
.50
.23
.72

Asked In TCS Neelkamal Sharma (14 years ago)

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(#M40002940) SELF QUESTION Keep an EYE

on a nice summer day two tourists visit the Dutch city of Gouda. During their tour through the center they spot a cosy terrace. They decide to have a drink and, as an appetizer, a portion of hot "bitterballs" (bitterballs are a Dutch delicacy, similar to croquettes). The waiter tells them that the bitterballs can be served in portions of 6, 9, or 20. What is the largest number of bitterballs that cannot be ordered in these portions?

jai Narayan Mishra (14 years ago)

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(#M40002938) SELF QUESTION Keep an EYE

The numbers 1, 2, 3, 4, 5, 6, 7, 8, and 9 must be put in the depicted triangle, in such a way that the sums of the numbers on each side are equal. How should the numbers be arranged in the triangle?

Solution

2
9 8
1 * 6
7 4 5 3
This answer is given by RAJENDRA and is correct answer

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jai Narayan Mishra (14 years ago)

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(#M40002935) SELF QUESTION Keep an EYE

Tom has three boxes with fruits in his barn: one box with apples, one box with pears, and one box with both apples and pears. The boxes have labels that describe the contents, but none of these labels is on the right box. How can Tom, by taking only one piece of fruit from one box, determine what each of the boxes contains?

jai Narayan Mishra (14 years ago)

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(#M40002926) TCS QUESTION Keep an EYE

(98*98*98 ± 73*73*73)/( 98*98*98 ± 73*73*73)=?

Asked In TCS sinjita (14 years ago)

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(#M40002924) TCS QUESTION Keep an EYE

There are 7 children and the youngest child is a boy. What is the probability that all of them are boys is 1 in

Asked In TCS jai Narayan Mishra (14 years ago)

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(#M40002923) TCS QUESTION Keep an EYE

NY public library is one of the worlds greatest repositories of books and journals. It has a beautiful reading room facing Manhattans famous 5th Avenue. In the reading room are 10 reading spots. Each reading spot consists of a round table with 4 chairs placed around it. There are some readers such that in each occupied reading spot, there are different numbers of readers. If in all there are10 readers, how many spots are empty?

Asked In TCS jai Narayan Mishra (14 years ago)

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