Latest TCS Aptitude Question SOLUTION: in an office, at various times during the day, the boss gives secretary a letter to type , each time putting the letter on top of the secretary's inbox. when there is time, the sec

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(#M40012761) TCS Numerical Ability question Keep an EYE

in an office, at various times during the day, the boss gives secretary a letter to type , each time putting the letter on top of the secretary's inbox. when there is time, the secretary takes the top letter off the pile and type it. if there are 5 letters in all and boss delivers them in the order 12345, which of the following could not be the order in which secretary types them?
a) 24351
b) 45231
c) 32415
d) 12345

Asked In TCS Divya Malhotra (11 years ago)

Unsolved Read Solution (19)

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Read Solution (19) :

raj  (11 years ago)

B) 45231 cant be the order of typing.....
Suppose boss put first time 4 letters in order 1,2,3,4
Then definitely she will strt typing the top one tht is 4th..after completing 4th letter...boss again put the 5th letter on the top....sho she again choose the top most tht is 5th one and type it...after tht queue will have order 1,2,3
So she should shoosed the top most one tht is 3rd card...but in option it is given 2 which is wrong...check like this in all the options.

Is this solution Helpfull? Yes (91) | No (4)  

Kuntal Banerjee  (9 years ago)

Simple stack concept.We have to find the possible combination of popping a stack order can be-
1)push 1, pop 1, push 2, pop 2,push 3, pop 3,push 4, pop 4,push 5, pop 5 so,letter popping order 1,2,3,4,5 so option d correct.
2)push 1,push 2,push 3, pop 3,pop 2,push 4,pop 4,pop 1,push 5,pop 5 so,popping order 3,2,4,1,5.so option c correct.
3)push 1,push 2,pop 2,push 3,push 4,pop 4,pop 3,push 5,pop 5,pop 5 so,popping order 2,4,3,5,1 so,option a is correct.
4)push 1,push 2,push 3,push 4,pop 4,push 5,pop 5.Now not possible to pop 2 without popping 3.so this cannot be a popping order.so,option b is not correct.

Is this solution Helpfull? Yes (21) | No (1)  

avinash trivedi  (11 years ago)

b;
use stack concept;

Is this solution Helpfull? Yes (19) | No (5)  

Rajat Dadhich  (11 years ago)

option a is also possible because.....
boss puts in first turn..1 and 2 and she types top one i.e 2
then boss puts 3 and 4... she types top one i.e 4 and then 3

while she is typing 3 boss puts 5 on top....
so next she types 5
dn lastly 1

hence, possible combination cn be
24351 also.... this may b a dummy ques... correct me if iam wrong

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Sukhdeep Singh  (11 years ago)

b) Not possible coz if 4 and 5 has been removed from the top, then there should be 3 after it. (Not the 2)

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s.jaweed hussain  (11 years ago)

d)12345 because it is clear that there is chance of taking in other i mean a,b,c orders but there is no chance of taking 12345

Is this solution Helpfull? Yes (5) | No (7)  

Alok Jain  (11 years ago)

ans is b...

Is this solution Helpfull? Yes (2) | No (1)  

Ankit Gupta  (11 years ago)

b is right

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sagar  (11 years ago)

b is not possible it is clear to me but how d can possible ?

Is this solution Helpfull? Yes (1) | No (6)  

Swarnab Roy  (9 years ago)

after getting the type of no 1 text,,boss will not provide the same text to type again...at option b thre is no 1 is 2nd tym provided by boss,,so ans is B

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Shambhu Tiwary  (9 years ago)

Answer a is correct

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RAVINDRA KUMAR YADAV  (11 years ago)

b is the correct one, because if 4th is removed first,it means it,s on top of stack,then 5,then 3 should come not 2,as it,s in order.

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srikhakollu bharghav  (11 years ago)

can anyone please explain me how option A can be done...

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pragya  (9 years ago)

can anybody explain why c is the possible order?

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RAJANIKANTH CH  (9 years ago)

to PRAGYA
123------3(top)
12-------2
14-------4
1--------1
5--------5

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ABDUL  (9 years ago)

only option B is correct

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Nivedhidha  (8 years ago)

Option a) cannot be the answer.
Because, when 2 letters are kept on top, the secretary takes the 2nd letter first.
Then, the 3rd letter is placed by the boss on top.
Then the fourth letter is placed.
Then, he can take the 4th letter now.
Now, he takes the 3rd letter.
Then the boss places the 5th letter.
Secretary now takes the 5th letter.
Then finally he can take the 1st letter from the pile to type.

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md shahid jamil  (8 years ago)

b is write answer

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sakshi shrivastava  (7 years ago)

Ans: (b)
Assuming the typist types letter No 4, the boss comes and place letter No 5 on top. There are only five letters and so, beneath the letter No 5 should be letter No 3. Hence the sequence under option (b) is not correct.

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