Infosys (comatibility)

1. at each odd year 25 % rise and at each even year
20% fall. then after
10 years what will be there ,a rise or a fall
ans:no rise or fall 3
marks
2. there is a road with length 36 miles.from the one
end, one girl and
from the other a boy starts on a bike towards each
other , with the speed
of 6 miles per hour.when the girls starts one pegion
starts with her at
18 miles per hr speed, meets the boy and then comes
back to the girl.
calculate the total distance travelled by the
pegion.(it doesn't take any
rest.) 3
marks
ans:54 miles

3.a rope of 20 m is cut randomly in 2 pieces such that
they are the
perimeters of the sruare.
1]what is the probability that the area of the bigger
square is 9 m2 or
greater than that.
2]what is the proabibilty that the adddtion of the
areas is 20.5 m2 or
gereater than that.
4marks
4.between A and B stations S (NAME) train travels.it
stars at 9 am then
it reaches b after 3 days 9.30 am. now if such S train
starts from B to A
then , how many S trains does it meet till it
reaches station B ?
ans:7 4 marks.

5.H,W and L (names starting with these letters)are
taking part in one
quiz where 30 questions are asked.there were 45
correcxt answers, amongst
them W answers 55 % that of H.the correct answers
given by the W & L
are 1.25 times that given by H. then the correct
answers given by each
are?(the name of the anchor was also starting with the
letter H and hence
added confusion). 6 marks
ans:20,11,14

6.some lenthy proablem....... with statemnts revealing
the conditions.
green red
and ... houses. 5 neighbours , with different
nationality, different pets
and.....
statements. 6 mark

7.there are 1-82 houses in one colony. i wish to find
out the house no. of
my friend who has newly shifted there. i asked him 3
questions. the answer
may be yes/no. u can find the correct house no.
1]is the noumber above 41?
2]is it divisible by 4?
3]is it perfect square?
ans:64 6 marks

8. three girls r there . to find ut their ages i asked
the questions. one
of them always lies, and other 2 speak truth.
some statements........
then what r the ages. 8 mark.
ans:mostly 26 23 22
9. 3 tribes........... condiion for marriages......
8 mark

this is the Infosys paper at REC TRICHY. 96 were
>shortlisted.
>

results have to come.......

in all 9 questions:
>(1hour ) 50 marks
>Some Question are incomplete soory for that.as By
>the
>time i wrote them down ,i forgot some of them.
>
>Questions
1> there are 111 players participating in atennis
match.Each match uses a new ball.
The loser of each match is eliminated from the
competiton.Find the number of balls used inthe
tennis
compettion.


>ans: 110
>
2) a spider makes a web over a 10 square inch window
> frame. each day it make sthe web twice it has made
>the
>previous day.
>the spider completes the web in 30 days. calculate
>the
>amount of time taken if two spiders are spiining the
>web over the same window.
>(Assuming that each spider completes the work in an
>indepedent manner)
>ans: 29 days


3)Timothy has a stock of ties.consisting of 17 blue
>ties,11 yelow ties.34 orange,9violet and 2 black
>ties.
>the room in which the ties are kept is dark.find
>outhe
>minimum number of ties with timothy should take out
>of
>the room
>so that he has atleast two ties of the same color.


>Ans: 6
>
>4)in a company of 24900 employee,45% of the
>employess
>read Daily.
>60% read Courier,and 40% read Inquirer.
>15% read both Daily and courier
>25% read both Daily and Inquirer
>35% read both inquirer and courir
>while 10% read all the three.
>a) find out how many read daily only?
>b) find out howmany read inquirer only ,courir only
>c) how many dont read newspaper at all


note: it's easy to do in %form , write the answer in
percent


>5)at sabina park ,in a match between india and
>westindies
>the three indian bowlers showed a marvelles
>performance.
>bedi ,prassna and vekatraghvan. find out from the
>condition how many wickets did each score
>conditon 1:
>either bedi took allthe five wicket or prassana took
>3
>wickets
>conditon 2:
>either there was a runout or prassna took one more
>wicket than bedi
>conditon 3)
>the sum of bedi and twice that of prassana is one
>more
>than thrice venkatraghvan
>
> ans :

bedi- 2 wickets

prasana- 4 wickets

venkata - 3 wickets

1 runout


>6) there were two friends.kamal and sikandar both
>were
>talking to each other.
>kaml wanted to ask the age of sikandars 3 children.
>they had the following conversation
>sikandar: the product of their ages is 36
>kamal: i dont have caomplete info abouthis
>tell me something more
>sikandar:the sum of thier ages is equal to u r age.
>kaml: i still cant guess it
>sikandar:my son is more than one year old from both
>my
>daughters.
>
>find the age of the three children
>ans:9 2 2
>


>7)there was a burglary in a neighbourhood. Five
>elderly gentleman used to live in the neighbourhood.
>sherlock holme had come to investigate the
>burglary.he
>had the following facts derived from the
>conversation
> from the five men . Mr black,mr Green,Mr brown,Mr
>grey.
>Mr Plumb
>find their age and names of thier homes.
> conditions:
>A)the 56 and 58 dont live inthe oak house
>b) Mr green is older than mr black
>c) Mr


>
>8) identify the apperance of culprit in the robbery.
>acoording to the foloowuing conditon
>acoording to the guard ,the culprit had blue
>eyes,tall
>,wore a vest and hat
>acoording to the cashier ,the culprit had dark
>eyes,short,wore a vest and hat.
>acording to the secretary,the culprit had green
>eyes,was medium short,wore a raincaot and no hat
>acoording to the director ,the culprit had gray
>eys,was tall , didnot wear a vest but had a hat.
> After the detaild enquiry ,it was found that
>witnesses provided exactly one detail correctly.
>while the atleast one witness provided the correct
>detail oft he culprit.
>Give the appearance of the culprit.


ans : blue eyes,short, wore a raincoat without hat

>
>9) Questin on seating arrnagement from barrons
>there are 10 people:- 5 male L M,N,P,Q AND 5 FEMALE
>U,V,W,S,T
>ALL ARE MARRIED. THAT IS THERE ARE 5 COUPLES.
>they are invbited to a partyy where they are to be
>seated in a row having 10 seat.
>the men ae to occupy the odd numbered seats.while
>the
>women the even numbered seats.
>a) the man whom the woman are married to ,should sit
>at right side of her husband.
>b) Q is Vs husband
>c)
>d)
>
>
>five question based on the above 5-6 conditions.
>
>

ans : i'm not sure the last one..

a. d

b.e

c- c

d: ......


>after this there was an esay writin on :15mins
>"IT IN ENTERTAINMENT INDUSTRY"
>OR
>" COST OF QUALITY CONTROL



Infosys paper held on 4th august in N.I.T.Calicut.

1. There are three tins each one having two boxes.
One tin contains red balls in the two boxes. The
second tin contains blue balls in the two boxes.
The third one contains red balls in one box and blue
balls in another box. Three labels are prepared “red
–red”, ”blue-blue” and “red-blue”. The labels are
fixed randomly on the three boxes. What is the
probability that only one label showing wrong
information?
Ans: 0.

2. In one family there are some boys and some girls.
Each boy has as many brothers as his sisters. And
each girl has as many sisters as the half of her
brothers. How many boys and how many girls are there?
Ans; boys 4,girls 3;

3. In a birthday party there are total 11. Each one
shook his hand with another one only once. Then what
is the total number of shake hands?
Ans: 55.

4.One man is traveling with a constant speed. Due to
consumption of energy the distance traveled per hour
is decreasing same amount every hour. He traveled 135
miles in first two hours. And in the next two hours
he traveled 104 miles. What are the distances he
traveled in the first and the last (fourth) hours?
Ans: 571/8, 385/8

5.One problem with some description about a circus.
The answer is
Ans : BALU.

6. There are two types of tea powders. One costs
5Rs/Kg. And another one costs 3Rs/Kg. 40 Kg of the
mixture is sold at 6Rs/Kg. The profit is 100/3
percent. What are the amounts of tea powders
individually?
Ans: 30Kg,10Kg.

7. one problem with venndiagram about some people
listening to radio stations.
The answer is 400.

INFOSYS 2002 ANNA UNIVERSITY 1/8/2002

Analytical paper(Duration:60 min)

1. In a singles tennis tournament,111 players are
participating.
For each game they will use a new ball.If any player
looses his match,he will be rejected from the
game.then,how many balls are required for the entire
game in order to find out the winner.
(3 marks) 110

2.In a rack there are some ties of different colurs as
follows.
17 green, 11 yellow, 9 blue, 2 orange,7 red.
In dark,how many ties should we extract in order to
have two ties of same colour?
(4 marks)(6)

3.In a company there are 29060 employees.
60%read Daily news.
45% read Indian express.
40% read times of india.
25% read both hindu& indian express.
30% read both indian express and times of india.
10%read both hindu and times of india.
5%read all the paers.
then find
a. How many read only hindu?
b.How many read only indian express and times of
india?
c.How many do not read news paers at all?
(4 marks)

4.one spider is spinning an area of window.It takes 30
days to complete the entire frame provided the
condition is it will spin the same area in the next
day as that of the previous day.
If 2 spiders do this work,then how many days will
those take provided the area spinned by one spider is
equal to that of the other.
(29 days)(4 marks)

5.There are 5 persons lying in one cottage area.
mr.brown, Mr.green, Mr.grey, Mr. plumb, Mr.blue
There are some clues were given about their living
areas and ages.
At last we have to find out their respective ages and
living areas.(GRE analytical type)
(8 marks)

6.Mr.Tom has 3 children.The conversation between him
and his friend George was going like this.
Tom: product of their ages is 36.
The son is elder than each of his sisters by more than
one year.
Can u find their ages?
(4,3,3)(4 marks)

7.The seating arrangement in a theatre is given by
means of some clues.
There are 5 men(l,m,n,p,q) and 5 women(s,t,u,v,w).
Conditions:
1. men will sit in the odd numbered seats.
2......(GRE analytical type)
(8 marks)

8.There was a cricket match and the description of the
no. of wickets taken by 3 plaers b,v,p are as follows.
Either B takes 5 wickets and v takes 3 or p takes a
wicket more than v.
Either B takes half of total wickets or One player is
run out.
Using these, find out the no.of wickets taken by each
player.
(6 marks) ans:4,3,2

9.Gre type like if 2 of 4 say lies then find the
correct one provided the clues given by each of them.
(8 marks) ans:Guard

The other paper is on english comprehension.
(Time: 15 minutes)

Topics:

Profit of quality at cost price
or
IT in entertainment industry.

(1)The price of a certain thing increases every odd
year by 25% And each even year it reduces
by 20%.....so what will happpen to a money after 10
years...... (3 marks)
ans: no loss no profit.

(2) This question is from shankuntala devi (only
sentences has changed)
Two trains are coming from opposite
direction at the speed of 30 miles per hour. and
initially the disence between this two train was 90
miles one pezion which is sitting on the one trainn ..
it is flying to another train ,and as soon as it has
reaches to another one it comes back to previous
train. and this is continyue till the collasion of the
train and flying speed of pezion is 18 miles per hour.
question is that how much distance pezion has
travelled.
Ans. 54 miles

2/two bikemen start at the same time from two
different destination towards each other on a sraight
lin path the distance between them is 36 km.. speed of
each bike is 6 km/hr......one bird starts flying from
one bike simultaneously......how much distance the
bird will travel when the two bikes meet.the speed of
the bird is 18 km/hr

3/ trains from amritsar to mumbai starts at 9:00 am
everyday........and reach mumbai at 9:30 am
after 3 days journey.....the similar is with the down
train.....it also start at 9:00 from mumbai and reach
amritsar at 9:300 after 3 days... the qs is one train
which is starting from amritsar will meet to how much
trains before reaching mumbai.....
Ans. 7 times
4/ there is a rope of 20 meter lenghth .....it is cut
into two pieces ....the two pieces are used to make
two squares using the ropes as perimeters....the qs is
what is the probablity that the area of one of the
square is greater than 9 m square/ what is
probabilty that the sum of the area of two squares is
greater than 20.5
Ans 0.8 or 0.2 (plz check it)
5/ ram's friend live in a house in the locality where
the house number starts from 1 to 82 when he asked his
house number he didnt says directly ........when ram
asked;;;
is it greater than 41?
is it divisible by 4?
is it a perfect square?
he answered all these answers...and ram got
the number.....is it possible ...if
possible then work out this.
Ans. 64
6/there was a question from baron i think.....and it
was not so difficult....a critical
reasoning type qs.......it was very big.....but easy
this is the question on age and answer is smeeta=
30, renu = 28, jyoti = 25
7/the difficult one i think no one have attempted
it......from summers i think.....

for interview they asked
tell about urself....
why do u want to go into software though u r
mechanical student........
why did u join M tech
and they asked 4 puzzles...
where do u find urself after 5 yrs..
the interview held for 30minutes....


. a. In a given RC circuit find the voltage across C
and R?
b. In a given CR circuit find the voltage across R and
C ?;
2.for the given _expression Y=A’B’C+A’BC+AB’C+ABC+ABC’
realize the following
a. 2 input and 3input NAND gate
b. 2 input and 3 input NOR gate
c. AND,OR, INVERTER.
d. INVERTER;
3.what is the importance of scan in digital system.;
4.given A XOR B =C, such that prove the following
a. B XOR C =A
b. A XOR BXOR C=0;
5. construct an input test pattern that can detect the
result E stuck at 1 in the ckt below
NAND (A,B)->E, NAND(C,D)->F
AND(E,F)->A.
6. in a given opamp ckt input offcet is 5mv,volatage
gain =10,000,vsat=+-15v
such that find the output voltage .
7. draw the p side equation of the circuit.(I am not
sulre about it)
8.make a JK FF using a D FF and 4->1 MUX.
9.use 2->1 MUX to implement the following _expression
Y=A+BC’+BC(A+B).
10.for the following ckt what is the relation between
fin and fout.?
the D FF use +ve edge triggered and have a intial
value is 0
CLK->two DFFs with complementing (i.e one DFF have CLK
and other one have
Complement of it),inputs of DFF is same and output of
DFFs is given to NOR
Gate and output of NOR gate is feedback to the two
DFFs.
11. design a asyncronous circuit for the following clk
waveforms.
CLK->thrice the CLK period->half the period of input.
12. what is the setup time and hold time parameters of
the FF, what happens if we are not consider it in
designing the digital ckt.
13. given two DFF A,B ones output is the input of
other and have the common clock.
Fmax if A and B are +ve edge triggered, if A is+ve
edge triggered ,B is -ve edge triggered what is the
Fmax relation to previous Fmax relation…
14. what are the FIFOS .? give some use of FIFOS in
design.
15. i don’t know about it but it is related to PCB
layout..
technical questions are completed.

remaining 10 questions are from optitude.
don’t worry about it.
these can be solve easily…

ALL THE BEST