Ittiam Placement Paper

1
--------S ----R1-------
| R2
V |___
| R3 |( C
| | -----
--------------------------
instantaneous Voltage across R2 when switch S is closed :
a.V*R2/(R1+R2)
b.V*R2/(R1+R2+R3)
c.0
d.V
Ans V*R2/(R1+R2+R3)------is what I wrote

2
---------R----------
| |
V L
| |
_______________

as freq increases which of the following increases

ans : Z and V(L)


3 q? on setup time and dealy

diagram below given not very clear\

clock period is 10ns ,
setuptime of each ff is 2 ns
clk2Q delay is 3ns
Slew dew to inverter is 1ns
Wht is the max allowable dealy of block D hold time=0

Ans 10-2-3-1=4ns
D
Slew=1
CLK=10ns


4 o/p of the following gate

A
or
nand
B
nand
C D
and
not
e

ans : (a+b)c+de


5 SER=10^-4 the BER of a QPSK
a =SER
b <=SER
c>=SER
d =SER/2
ans >=SER

6 for 62db of PCM System what is the no of bits =10

7 for a 4 level pipeline processor the no of machine cycles required for executing 4 and (someno I dont rember) with initially pipeline flushed

ans = 4+3 and +3
u add there for initial latency

8 An ideal LPF is
a causal
b non causal
c non stable
d none
ans: non causal ,

9 impluse func and white noise have same
a magnitude and phase response
b magnitude response
c phase response
d none
ans magnitude and phase response

10
y(t)=y(t-1)+0.1x(n) is what typr of filter
ans : IIR LPF

11 a signal s(t)=sin(omega*t) is sampled at fs, then the resulting signal spectrum is periodic depends on:
a Omega/fs
b omega *fs
c omega
d fs
ans omega/fs

12 if 2 gaussian func of mean m1 and m2 are added the wht is the resulting PDF
a guassian func with mean m1+m2
b guassian func with mean m1+m2/2
c uniform with mean m1+m2
d rayelig with mean m1+m2

13 u(t)+ sumof( deltafunc(n-k)){n=- infinitive to+ infinitive ) is equaltent to
I hope I am made this clear it is a simple one
Ans u(-t-1) +2u(t)

14 if the probaba of drawing an even no is p the wht is the probailty of drawing odd no in 2nd chance given 1st draw resulted in even one
a.p
b.(1-p)
c.p(1-p)
d.p/(1-p)
ans p(1-p)

15 no of multi required to mutli 2 upper triangular matrixes
a p(p+1)/2
b (p-1)(p+1)/2
c.summation (i=1 to p) i(i+1)/2
d..
ans:c