Wipro paper(System software)

July-2003

------------

PART --A

------------------------------------------------------

1) abcD+abcd+aBCd+aBCD

then the simplified function is

( Capital letters are copliments of corresponding letters

A=compliment of a)

[a] a [b] ab [c] abc [d] a(bc)* [e] mone

(bc)*=compliment of bc

Ans: e

-------------------------------------

2) A 12 address lines maps to the memory of

[a] 1k bytes [b] 0.5k bytes [c] 2k bytes [d] none

Ans: b

----------------------------------------

3) In a processor these are 120 instructions . Bits needed to impliment

this instructions

[a] 6 [b] 7 [c] 10 [d] none

Ans: b

-----------------------------------------

4) In 8085 microprocessor READY signal does.which of the following

is incorrect statements

[a]It is input to the microprocessor

[b] It sequences the instructions

Ans : b

----------------------------------------

5) Return address will be returned by function to

[a] Pushes to the stack by call

Ans : a

------------------------------------------

6)

n=7623

{

temp=n/10;

result=temp*10+ result;

n=n/10

}

Ans : 3267

----------------------------------------------

7) If A>B then

F=F(G);

else B>C then

F=G(G);

in this , for 75% times A>B and 25% times B>C then,is 10000 instructions

are there ,then the ratio of F to G

[a] 7500:2500 [b] 7500:625 [c] 7500:625 if a=b=c else

7500:2500

--------------------------------------------------

8) In a compiler there is 36 bit for a word and to store a character 8bits are

needed. IN this to store

a character two words are appended .Then for storing a K characters string,

How many words are needed.

[a] 2k/9 [b] (2k+8)/9 [c] (k+8)/9 [d] 2*(k+8)/9 [e] none

Ans: a

---------------------------------------------------------

9) C program code

int zap(int n)

{

if(n<=1)then zap=1;

else zap=zap(n-3)+zap(n-1);

}

then the call zap(6) gives the values of zap

[a] 8 [b] 9 [c] 6 [d] 12 [e] 15

Ans: b

---------------------------------------------------------------

PART-B

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1) Virtual memory size depends on

[a] address lines [b] data bus

[c] disc space [d] a & c [e] none

Ans : a

-----------------------------------------------

2) Critical section is

[a]

[b] statements which are accessing shared resourses

Ans : b

-------------------------------------------------

3) load a

mul a

store t1

load b

mul b

store t2

mul t2

add t1

then the content in accumulator is

Ans : a**2+b**4

---------------------------------------------------

4) question (3) in old paper

5) q(4) in old paper

6) question (7) in old paper

7) q(9) in old paper

------------------------------

Hughes,Delhi:

-------------

> > (A)Aptitude :25 Qns, 20 Minutes

> >

> > 1. 2 x 4 analytical GRE type qns

> > 2. 2-3 Reasoning qns (GRE type)

> > 3. Probability of getting a sum of 7 when two dices are thrown together

> > 4. Rest quantitative questions

> >

> > (B) Technical: 50 Qns, 45 Minutes

> >

> > 1. 3 qns on operating systems. I qn on dijkestra algorithm

1. 3 qns on operating systems. I qn on dijkestra algorithm

> >

> > 2. Using which pin it's possible to address 16 bit addresses even though

there

> > are only 8 address bits in 8085? Ans: ALE

> > 3. Voltage gain for an amplifier is 100 while it is operating at 10

volts.

> > What is the O/P voltage wen i/p is 1 volt

> > 4. Quality factor indicates a0 Quality of inductor b) quality of

capacitor

> > c) both

> > 5. Qns related to bridges, routers and generators, which OSI layer they

> > corresspond to. (Refer to stevens 4th chapter)

> > 6.OPAmp's I/P ciurrent, O/p current and CMRR is given, what is the

voltage

> > gain

> > 7. 2-3 qns on scope of static variables in C. Qn to view o/p odf a C

static

> > var

> > 8. Qn to print a value of a pointer

> > 9.resistance increases with temperature in a) Metal b) semiconductor

> > 10. A qn to find the physical address from a given virtual address,

virtual

> > to physical address table was provided

> > 11. 16 bit mantissa and 8 bit exponent can present what maximum value?

> > 12. 4 bit window size in sliding window protocol, how many

acknowledements can be held?

> > 13. Security functionality is provided by which layer of OSI

> > 14. Frequency spectrums for AM, FM and PM (figure given, u'veto tell

which

> > Kind of modulation it belongs to)

> > 15. Among AM and FM which is better and why?

> > 16.LASt stage of TTL NAND gate is called: Ans: Totem Pole Amplifier

> > 17. SR to JK flip flop conversion. Ans: S=JQ', R=KQ

> > 18. LSB of a shift register is connected to its MSB, what is formed:

Ans:

> > RING Counter

> > 19. 2-3 Qns based on Demorgan's laws (identiies: (A+b)' = A'b', etc)

> > 20. 2 qns on Logic gates (O/p of logic gates)

> > 21. Diff in IRET and RET statements of 8086

> > 22. How many address bytes are required to address an array of memory

chips

> > (4 * 6), each chip having 4 memory bits and 8k registers.

> > 23. Diff. in memory mapped and I/P O/P mapped Input/Output (Refer a book

23. Diff. in memory mapped and I/P O/P mapped Input/Output (Refer a book

on Microprocessor)

> > 24. Qn on pipeline architecture

> > 25 QN on LAPB protocol

> >

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