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Wipro paper(System software)
 July1997
 
 
 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] none  (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 AB then
 F=F(G);
 else BC then
 F=G(G);
 in this , for 75% times AB and 25% times BC 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(n3)+zap(n1);
 }
 then the call zap(6) gives the values of zap
 [a] 8 [b] 9 [c] 6 [d] 12 [e] 15
 
 Ans: b
 
 
 
 PARTB
 
 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