ST MicroElectronics placement paper 3

ST MicroElectronics placement paper 3


ST MICROELECTRONICS PLACEMENT PAPER - 3



INTERVIEW

TECHNICAL

C QUESTIONS

Data types, Pointers, Dynamic Memory Allocation, Preprocessor Directive

OS QUESTIONS

Multitasking, Parallel Processing, DMA

VLSI QUESTIONS

Short circuit power dissipation, Static and Dynamic power dissipation

HR Why ST?

Is money reason for carrying to ST

Serving in ST for 3-5 years itself is demanding job security is less …How will you cope up?


Noida is far away and people of the place are of different culture How will u cope up?

Study abroad

What is ur short term specific objective (to reach what destination)

Character and Personality

APTITUDE TEST

OS

Compiling Linking Loading , Disk Scheduling Algorithms Memory Management Algorithms, cpu Scheduling Algorithms ,Computer Networks (CRC)

DIGITAL --Half Adder Karnaugh Map

Microprocessors -- Stack CALL POP instructions

Data Structures -- Sorting

1.which of the following no. can be represented w/o any error using IEEE format (64 bits-1 bit sign bit,exponent 7,mantissa 56)

a)2 b).4 c).5d)none



2.CRC polynomial is given. Message is given. Find the message to be transmitted.

3. what r the gates used in half adder.

4. simplify a Boolean eqn.(Karnaugh map is used to solve)

5. which of the devices can be used as latch?

a.JK F/F

b.SR latch

c.Data F/F

d.T F/F.

6.the probability of the message coming out of a source is ½,1/4,1/8,1/8.what is the information content in the message?

a.6/5

b.7/4

c.1

d.none

7.how many page faults r reqd. for swapping given pages using LRU algo. For a frame size of 3.

8.the time of exec. Of 4 processes P1-P4 r given.using Round robin(1 sec) method find the time taken for P4 to finish?

9.main()

{fork();fork();fork()}

How many processes are created?



10.a.while(;;)

{b.while(;;)

{sleep();}

which of the following is true?

execution time of a is more than b

execution time of b is more than a

similarly 2 more options r given.



11. mov sp, addr

call addr

pop sp

what is the value stored in sp and hl?

There were 10 1 mark q’s which includes linking & compiling & all r based on OS only.

The above r 2 marks & 5 marks Q’s.

10*1,5*2,5*5=50 marks for aps.

16. Y catches 5 times more fishes than X. If total number of fishes caught by X and Y is 48, then number of fishes caught by X?

Ans: 8

17. Y catches 5 times more fishes than X. If total number of fishes caught by X and Y is 42, then number of fishes caught by X?

Ans: 7

18. If a train covers 600m in 0.5 seconds, how long it will cover in 10 seconds?

Ans: 3000m = 3km

19. The girl's age is twice that of boy, if the boy is four years old. After four years the age

of the girl is

Ans: 12 years

20. Sister's age is twice than that of the brother. If the brother's age is six, what is the sister's age after two years?

Ans: 14 Yrs.

21. Two lemons cost 10 cents. Then one and a half dozen cost

Ans: 90 cents

22. A clock is late by 1 minute 27 seconds in a month. Then how much will it be late in 1 day?

Ans: 2.9 seconds

23. Which of the following figures together will make a triangle?

Ans: a,b,c,d

24. Make a square by drawing only one line

Ans: line 2-5, square 2-3-4-5-2

25. Which of the following is the odd one? crew, constellation, companion, league, participants.

Ans: companion

26. Opposite of Remote?

(a) Far (b) Near (c) Huge (d) Village

27. Statement A: All great men are ridiculous;

Statement B: I am ridiculous ;

Inference : I am a great man;

(a) True (b) False (c) Not clear

28. Statement: Normal children are active;

Inference: All children are active;

(a) True (b) False (c) Uncertain

29. Next number in the series 1, 1/2, 1/4, 1/8 ?

Ans: 1/16

30. In 6 seconds a light flashes once. In one hour how many times it will flash?

Ans: 601 times

31. At 20% discount, a cycle is sold at a selling price of 2500 Rs. What is the actual price?

Ans: Rs. 3125

32. Statement A: A & B have same age;

Statement B: B is younger than C;

Inference : A is younger than C;

(a) True (b) False (c) Uncertain



33. All chickens lay eggs (True/False)

Ans: False

34. A invests $12000, B invests $8000, C invests $6000 and they got a profit of $1200. How much share A got more than B and C?

Ans: 2/13 and 3/13

ST MicroElectronics placement paper 2

ST MicroElectronics placement paper 2
ST MICROELECTRONICS PLACEMENT PAPER - 2
1. separate for the hardware
2. and other for the software
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 questions section 2 contains 13 que section 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 functn poles n zeroes were given in a graph
ans: 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:
0000
0001
0011
1111
codeword b:
101111
110101
14. options were given to choose as which was an example of multitasking.
a:multiple remote users accessing a server
b:user working on spreadsheet, downloading some matter from internet
c: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 be
asn. 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 mechanism
ans TLB
21.what will happen in following code..
signal(mutex)
critical section
wait(mutex)
ans. violation of mutual exclusion
22.an RLC ckt was given, fuctioning of ckt to be determined.
a: will act like FM
b: PM
c:AM
d: 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 string
a: static string
b: 'static string'
c: "static string"
d:char sting[30]
25.a que on file handling in c
a: file cant be opened
b:msg.txt is copied to msg
c:only first string be copied

26. which of the fuction will store a 100 char string in X
a: fread(x,100,....)
b. fread(100,x,.......)
c.gets(x)
d.read(x)
Hardware paper..
there were 22 que, all of them were computer related < -

ST MicroElectronics placement paper 1

ST MicroElectronics placement paper 1
ST MICROELECTRONICS PLACEMENT PAPER - 1
INTERVIEW
TECHNICAL
C QUESTIONS
Data types, Pointers, Dynamic Memory Allocation, Preprocessor Directive
OS QUESTIONS
Multitasking, Parallel Processing, DMA
VLSI QUESTIONS
Short circuit power dissipation, Static and Dynamic power dissipation
HR
Why ST?
Is money reason for carrying to STServing in ST for 3-5 years itself is demanding job security is less …How will you cope up?Noida is far away and people of the place are of different culture How will u cope up?Study abroadWhat is ur short term specific objective (to reach what destination)Character and PersonalityAPTITUDE TEST
OSCompiling Linking Loading , Disk Scheduling Algorithms Memory Management Algorithms, CPU Scheduling Algorithms ,Computer Networks (CRC)
DIGITAL --Half Adder Karnaugh MapMicroprocessors -- Stack CALL POP instructions
Data Structures -- Sorting1.which of the following no. can be represented w/o any error using IEEE format (64 bits-1 bit sign bit,exponent 7,mantissa 56)
a)2 b).4 c).5d)none2.CRC polynomial is given. Message is given. Find the message to be transmitted.

3. what r the gates used in half adder.4. simplify a Boolean eqn.(Karnaugh map is used to solve)5. which of the devices can be used as latch?
a.JK F/Fb.SR latchc.Data F/Fd.T F/F.
6.the probability of the message coming out of a source is ½,1/4,1/8,1/8.what is the information content in the message?
a.6/5b.7/4c.1d.none
7.how many page faults r reqd. for swapping given pages using LRU algo. For a frame size of 3.
8.the time of exec. Of 4 processes P1-P4 r given.using Round robin(1 sec) method find the time taken for P4 to finish?
9.main()
{fork();fork();fork();}How many processes are created?10.a.while(;;){}
b.while(;;)
{
sleep();
}
which of the following is true?
a. execution time of a is more than b
b. execution time of b is more than a
similarly 2 more options r given.

11. mov sp, addr
call addr
pop sp
what is the value stored in sp and hl?
There were 10 1 mark q’s which includes linking & compiling & all r based on OS only.
The above r 2 marks & 5 marks Q’s.
10*1,5*2,5*5=50 marks for aps.

pattern

ST MicroElectronics pattern
ST MICROELECTRONICS
INTERVIEW
TECHNICAL
C QUESTIONS
OS QUESTIONS
VLSI QUESTIONS

APTITUDE TEST
DIGITAL --Half Adder Karnaugh Map
Data Structures -- Sorting