| Wednesday, September 07, 2005 |
| Patni Computer Services (PCS) Placement Paper |
Q. A man leaves office daily at 7pm A driver with car
comes from his home to pick him from office and bring
back home
One day he gets free at 5:30 and instead of
waiting for driver he starts walking towards home.
In the way he meets the car and returns home on
car He reaches home 20 minutes earlier than usual.
In how much time does the man reach home
usually??
Ans. 1hr 20min
Q The following truth table is given What is Y equal
to??
A B C Y
0 0 0 1
0 0 1 1
0 1 0 0
0 1 1 0
1 0 0 0
1 0 1 0
1 1 0 1
1 1 1 1
Ans. (A')(B')(AB) , where ' stands for complement.
Q. A works thrice as much as B. If A takes 60 days
less than B to do a work then find the number of days
it would take to complete the work if both work
together?
Ans. 22½days
Q. How many 1's are there in the binary form of
8*1024 + 3*64 + 3
Ans. 4
Q. In a digital circuit which was to implement (A B) +
(A)XOR(B), the designer implements (A B) (A)XOR(B)
What is the probability of error in it ?
Q. A boy has Rs 2. He wins or loses Re 1 at a time If
he wins he gets Re 1 and if he loses the game he loses
Re 1.
He can loose only 5 times. He is out of the game
if he earns Rs 5.
Find the number of ways in which this is
possible?
Ans. 16
Q. If there are 1024*1280 pixels on a screen and each
pixel can have around 16 million colors
Find the memory required for this?
Ans. 4MB
Q. On a particular day A and B decide that they would
either speak the truth or will lie.
C asks A whether he is speaking truth or lying?
He answers and B listens to what he said. C then
asks B what A has said B says "A says that he is a
liar"
What is B speaking ?
(a) Truth
(b) Lie
(c) Truth when A lies
(d) Cannot be determined
Ans. (b)
Q. What is the angle between the two hands of a clock
when time is 8:30
Ans. 75(approx)
Q. A student is ranked 13th from right and 8th from
left. How many students are there in totality ?
Q. A man walks east and turns right and then from
there to his left and then 45degrees to
his right.In which direction did he go
Ans. North west
Q. A student gets 70% in one subject, 80% in the
other. To get an overall of 75% how much should get in
third subject.
Q. A man shows his friend a woman sitting in a park
and says that she the daughter of my grandmother's
only son.
What is the relation between the two
Ans. Daughter
Section1:
5 questions.. (Mutiple choices)
i.e select any one of the following for 5 questions;;
A) only 1 is sufficent
B) only 2 is sufficent
C) both nessary
D) both are insufficent
E) either is sufficent
1. .......... (Don't know)
2. one composition contains... 5/4 L 6/14 L....
(Ans. both r insufficent)
3. x fabric.... 6.50 per meter , 25% wholesale...
(Ans: both r required)
4 & 5 don't know....
/**************************************/
Section 2 (Analitical...)
1. Average 3years 45,000, 1st 1.5 times, 2nd 2.5
times..
(Calculate in this way... (x+1.5x+2.5x)/3 = 45000 i.e
5x/3 =
45000 )
then calculate required value...)
2. Three vehecle speed ratio 1:2:3 & time ratio
3:2:1...
Distance ratio ??
(Ans: 3:4:3.. check once)
3. some km/hr problem...
(Ans: 150 km/hr)
4 & 5 don't know....
/***********************************/
Section 3 (English - 8 marks.. mutiple choice..)
Don't know...
/******************************/
Section 4 (True or Flase type..)
1. Square contains all angles , one object does not
contain angles;
-----------------------------------------------------
///////////////PATNI NEW OVER at jadavpur
99////////////
____________
1.what is the angle between teo hands of a clock when
time is 8-30
ans:75(appro
2.a student is ranked 13th from right and 8th from
left.how many are
there(similer)
3.a,b,c,d,e,f are arranged in a circle b is to right
of c and so on(rs
aggrewal)
4.chain rule(work&time)
5.puzzle test.some data is given and he asked three
qustions below.based on
data
we have to answer.
6.six questions on venn diagrams.
7.5 years ago sum of ages of father and son ans:40,10
8.assertion and reasoning 1.clouds 2.capital city of
dweloped corentira ans
for
both is :a
9.man walks east & from turns to right & from to left
&then 45degrees to
right.in which direction he went ans:north west
10.aa-b-bb-aaa-
11.96,85,....(a series with diff
11),3,15,45,....,total 3 questions are
given on
series
12.a student got 70% in one subject,80% in other.to
get overall 75% how much
he
should get in third subject.
12.a news pwper must have a.news b.advertizements
3.editor 4.date 5.paper
13.if clouds are air, air are water and so on where
birds fly?
14.press,cinema,tv ans:mass media
15.3 qustions on rs aggrewal relations i.e first few
chapters of
aggrewal(english)
16.a man showed to a woman sitting in a pack & told to
his friend.she is
the
daughter of my grand mother only son ans:daughter
group disscussion topic
1.if you become muncipal corporater what steps you
take to develop your
area.
2.if you become administrative officer of this
university what steps you
take to
improve standards.
3.tell what are the seven problems in calcutta and
solutions to problems?
4.abortion is legal or illegal
the following two topics are omportant they asked the
same topics to many
students by changing the numbers
5.in 2050 a nuclear disaster has ocurred and 50
persons are saved.which are
of
age above 15.of them 20 know 6 subjects and you have
to choose only 3 of
six
subjects so that resticted resorces can used for
future
subjects are 1.enggineering 2.medical 3.law 4.social
sciences 5.life
sciences
6.----
6.in space ship 5men are going1.docter,drug asdditive
2.lady lawer has done
crime 3.teacher emotinally imbalanced
4.18.18 year old aeruonautical engineer 5. noble
lauraut .suddenly some
thing
happend
and oxygen is avaliable to only three people to use
which of three you
choose
interview
here they asked only personal.relating to what you
have written in
sychometric
test
and some puzzles
one puzzle is 10 machines are there only one is
defective iteams are coming
out
how tdo you find out which is defective
second: *
* * how do you reverse this in two transitions
* * *
* * * *----------------------------------- two
transistors are connected Vbe is 0.7volts .this is
simple ckt.one
transistor is diode equivalent. & asked the o/p across
the 2 nd transistor.
2.simple k map ans is Bbar.
3.
Emitter
---R-------transistorbase| --
| ---
collector
in above capacitor is connected parallel with
resistance r.capacitor
is not shown
in fig.capacitor is used for in this ckt:
ans:a.speedupb.active bypass c.decoupling
4.
-----R------I----------o/p
|___R____ |
in above r is resistence.I is cmos inverter.
then ckt is used for:
a.schmitt trigger b.latch c.inverter d.amplifier
5.simple amplifier ckt openloop gain of amplifier is
4.V in =1v.asked for
V x?
amplifdier + is connected to base. - is connected to
i/p in between 5k is
connected.
from o/p feedback connected to - of amplifier with
15k.this is ckt.
6.resistence inductot cap are serially connected to ac
voltage 5
volts.voltage across
inductor is given.R I C values are given & asked for
voltages across resistence & capacitor.
7.
___ R_____
| |
---R------OPAMP ----------
|---
R1 R1 is for wjhat i mean what is the purpose of R1.
|
ground
8.asked for Vo at the o/p.it is like simple cmos
realization that is n block
is above
& p block is below.Vdd is 3 volts at supply.V
threshold 5 volts.
9.2 d ffs are connected in asyncro manner .clock 10
MEGAHZ.gate delay is 1
nanosec.
A B are the two given D FFs.asked for AB output is:
a.updown
b.up c. updown glitching like that (take care abt
glitching word)
10.
----------------| subtractor|---------o/p
|___HPF____|
the ckt is LPF ,HPF or APF ?
11.in a queue at the no of elements removed is
proportional to no of elements
in
the queue.then no of elements in the queue:
a.increases decreases exp or linearly(so these are the
4 options given choose
1 option)
12.with 2 i/p AND gates u have to form a 8 i/p AND
gate.which is the fastest
in the
following implementations.
ans we think ((AB)(CD))((EF)(GH))
13.with howmany 2:1 MUX u can for 8:1 MUX.answer is 7.
14. there are n states then ffs used are log n.
15.cube each side has r units resistance then the
resistance across diagonal
of cube.
16.op amp connections asked for o/p
the answer is (1+1/n)(v2-v1).check it out.practise
this type of model.
17.
_____________ supply
---|__ ___|
Ii >________ |___ Tranistot
> _______Vo
|
|
R |
| | Io
ground.
asked for Io/Ii=? transistor gain is beta.
a.(1+beta)square b.1+beta c. beta
18.y=kxsquare. this is transfer function of a block
with i/p x & o/p y.if i/p
is
sum of a & b then o/p is :--
a. AM b.FM c. PM
19.
------MULTIPLIER--- |
| |
_____R__|__OPAMP______________________Vo
---
|
ground.
v in = -Ez then o/p Vo =?
answer is squareroot of -Ez.multiplier i/ps are a & b
then its
o/p
is a.b;
--------------------------------------------------------
1.1 True
1.2 False
1.3 True
Thanks to sushree kanta peda for sending this to me! |
posted by Midhun @ 7:09 AM   |
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