verifone placement paper - whole testpaperTotal Views 511

Paper Title :  verifone placement paper - whole testpaper

Posted Date : 31 Mar 2011
Paper Type : Whole Testpaper

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Verifone Candidate Experience 2011-2012


There will be 45 qstns. 15+5+5+5+5+5+5.

section: electronics:

1.a logic ckt is given and asked to identify the configuration.
ans: XOR.


2.multi vibrator with nor gates is given
ans: astable multi sqr wave opt.

3.4 stage ripple counter with delay(f/f) 10msec. How much time it takes
for a state to change. 4*10=40.


4.impedence of a p'lel resonant circiut at resonance:R.


5.serial to parellel conversion is done by ans:shift register.


5.if the address bus id 20bits.then the memory space is 1Mb.


6.filtering can be done with:capacitor,iductor,both,none.


7.the config that is worst effected by low CMMR
ans:Non inverting amplifier.


8.two progs are given. one satrts counting frm 0 to MAX and the other
stars frm MAX to 0. which one executes fast.may be Max to 0.Think of.it
should be.

another 6 qstns are there. simple.

Networks:

1.the fctn of datalink layer is:bit stuffing.


2.which of the following is not fctn of datalink layer: Encription.


3.voltage levels of rs232x:+12,-12.


4.which of the following is not used for client/server.


RPC, TCP/IP, MESSAGEQs None ans:may be none.

5.Database:

1. which of the following is true.
ans:the primary key in Database design is very important.


2. SQL is a Non procedural query langauge.
3.
4
5.


Compiler/algo/ds:

1.Data structure used to impliment a menu: doubly linked circular linked list.
2. some regular expression is given:WaW'.may be it is context free grammar.
3.,4,5.


os:
1.the feature of real time os is: fast context swithing.
2.os impliments protection with the help of hardware(like virtual
addressing in 386/286 etc).



C:
some small c progs are given asked to tell the function/errors etc.
one of the qstn(last in the paper) is an invalid statement.
finish of all these very fast and think about those others. they are
simple only.


Interview:

depends on the member.(Mr.Deep if he comes asks archirect of 586/486/386/286
etc. otherwise DS,OS,C,TCP/IP . they hv taken 21(18btechs+3mtechs).
ok if u hv any queries ask immediately.