Provided by www.YuvaJobs.com - STMicroelectronics   Paper    Aptitude - General        


ST Microelectronics
there were two papers1. separate for the hardware (electonics people)2. and other for the software (comp).
Software paper
There were 3 sections the questions in these sections were mixed with 2-3 aptitude question, questions on comp n/w & OS were 7-8, 1-2 on CSO, 1 que on controls, 1 on sampling theorem some on Comp Arch. & digital logic & 7-8 on C.
section 1 contains 11 questionssection 2 contains 13 quesection 3 contains 13 que ( total = 37 que , marks= 50)
All the 3 sections was compulsary and u,ve to give a preference among the section 2 & sec 3 so that the weightage for the second one will get doubled. Negative marking was there.
here are some of the ques which i remember
1. which conversion is not possible a. float to int b. int to float c. char to float d. all are possible Ans: d
2. threads have which thing in common a. register set b. data section c. thread id d. ... Ans : b
3. one que like main() { int x=5, y; y= x*x++ * ++x ;
 // print x and y }
4. A CPU has four group of instruction set A, B, C, D CPI of A = 1 CPI of B=3 Cpi of c =2 cpi of d= 4 the cpu access 20% of A, 30% of b, 30% of C and 20 % of D what will be the average CPI.  Ans: 1*20/100 + 3* 30/100 + 2* 30/100 + 4* 20/100( this que was repeated in section 2 & 3)
5 . a question on hit ratio n effective memory access time.
6.  main() { int a=10,b=5 while ( --b>=0 && ++a) { --b; ++a; } print (a); print (b); } ans: a=16, b=-2
7. main() { char i;  for (i=0; i<=255; i++) { printf("%c", i); } } Ans: never ending loop
8. One question on controls systems to find the transfer functnpoles n zeroes were given in a graphans: s(s-2)/(s-3)(s-4)
9. one question on sampling theorem, if sampling frequency is fs then the signal having same characteistics will be of frequency....(in terns of fs)
10. one on the signal to noise ratio - if the amplitude of the signal is reduced to half & N bits samples r used with M quantiztn level, then the SNR will be reduced by a factor of Ans: 6 db
11. questn on calculating the bit rate to be transmitted across the given capacity channel
12. calculating the checksum for the bits to be transmitted given the frame- 11000101 and generator is1100.
13. calculating the no of bits required for the error detection & the error correction for the given codeword set.codeword a:0000000100111111codeword b:101111....110101
14. options were given to choose as which was an example of multitasking. a:multiple remote users accessing a serverb:user working on spreadsheet, downloading some matter from internetc:multiple programs resident in memory
15. CA in CSMA/ CA stands for a. collision approval b. collision avoidance c. critical access
16. in a triangle, without changing the angle, if we double the sides,then new area will beasn. four times
17. there is a pipe having dia 6mm, then how many pipes having 1mm dia wiill be needed to provide same amount of water.ans . 36
18. in which of the folwng schemes after page replacement the entered page will enter in the same memory location as of the replaced one a. direct mapping ( Ans) b. n-set associative c. associative d. none of them 19. belady anamoly is related to.ans. page replacement algos
20.which one uses cache mechanismans TLB
21.what will happen in following code..signal(mutex)critical sectionwait(mutex)
ans. violation of mutual exclusion
22.an RLC ckt was given, fuctioning of ckt to be determined.a: will act like FMb: PMc:AMd: none of the above
23.int i=0;switch(i){case 1: printf("hi");case 0: printf("zero");case 2: printf("world");}
ans: zeroworld
24.which one is the declaration of static stringa: static stringb: ,static string,c: "static string"d:char sting[30]
25.a que on file handling in ca: file cant be openedb:msg.txt is copied to msgc:only first string be copiedd:
26. which of the fuction will store a 100 char string in Xa: fread(x,100,....)b. fread(100,x,.......)c.gets(x)d.read(x) 
 
Provided by www.YuvaJobs.com - STMicroelectronics   Paper    Aptitude - General