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Flextronics Written test 2014

Posted on :07-03-2016

Section C

Q1. A lead compensator zero is at Z=Zc, pole is at P = Pc then the following is correct 

a. Pc > Zc, pc< 0, zc< 0


Q2. Gain margin of g(s)h(s)=1/s(s+k);

a. sqrt(1+k2)
b. 0
c. infinity
d. 1


Q3. Manchestor code does not improves 

a. clock recovery
b. bandwidth efficiency


Q4. Possion distribution is used for

a. used in FSM
b. used for queuing delay system of mutually identical events of arrival
c. both a and c


Q5. Number of flip flops for mod 11 counter

a. four
b. five


Q6. If even parity is used for parity generation, what is the hamming distance (simple fig is given)?

ANS: 2


Q7. The code set is {00000, 00111, 11100, 11011} what is the error detecting and correcting capability?

ANS: 2,1


Q8. Operational amp characteristics following is correct: 

1. input impedance is 0
2. output impedance is infinity
3. input impedance is infinity
4. gain is infinity which combinations are correct


Q9. Band pass signal having frequencies 2.5 k and 4.5 k? Give the sampling frequency

a. 9 k
b. 4 k
c. 4.5 k
d. 7 k


Q10. Definition of avalanche diode multiplication


Q11. More no of ripples are present in the diagram? Which is correct 

a. lower order filter
b. high order filter


Q12. If CPU have one interrupt pin and on to connect with external devices with some priority? Which type of the following is used?

a. parallel priority interrupt
b. daisy chain
c. RS flipflop


Q13. One megabit file transfer, serially on 9600 baud one start bit and two stop bits, then how much time it takes (approx)

a. 4 hours
b. 2 hours
c. 20 minutes
d. 2 minute


Q14. IEEE 802.5 is 

ANS: TOKEN RING


Q15. Code sequence is given what is the error correcting distance


Q16. Bit stuffing used in HDLC Protocol.



Section A AND B (Both are mixed )

Q17. If "AaBbCc" is passed to the char

char x(*a)
{
a[0]?x(a+1):1;
printf("%c",a[0]);
return 1;

What will be the output?


Q18. What is the output of the following program?

f(*p)
{
p=(char *)malloc(6);
p="hello";
return;
}
main()
char *p="bye";
f(p);
printf("%s",p); 
}


ANS: bye


Q19. Then the program counter is incremented in the instruction cycle

a. fetch cycle
b. int cycle
c. execution cycle


Q20. Who sorted lists of n elements will take at least fine the order of complexity?

a. 2n
b. n/2
c. square(n)


Q21. Logic diagram is given? find the expression
 
ANS: OR gate


Q22. Question on JAVA string 

ANS: string ends without a null character


Q23. Ache access time is 100 ns. main memory access time is 1000 ns, hit ratio is .9, find mean access time?

ANS: 200 ns


Q24. Which is not suitable to find out IP address?

ANS: ARP


Q25. About deadlock condition


Q26. Convert 41.6875 into binary


Q27. Read about IP AND IPX


Q28. Read about NFS


Q29. DHCP is

a. for routing
b. for network address conversion 
c. for diagnosis


Q30. Execution phase can be

a. pipelined
b. no parallelism is possible
c. vector processing


Q31. In public key algorithm , A wants to send message to B ..... which key is used

a. A public key
b. A private key
c. B public key
d. B private key


Q32. To prevent replay attacks in transmission

a. symmetric encoding
b. Asymmetric encoding
c. for every exchange, key should be changed


Q33. Virtual functionality is used in C++

a. dynamic binding
b. if the derived func is present but base class not present 


Q34. If there are n nodes in a binary tree, how many null pointers are there 

ANS: n+1;


Q35. If heap sort contains n elements, no of comparisons required are

a. log(n)
b. height of heap sort


Q36. Question on ICV(integrity check)


Q37. Which of the following is efficient in terms of space

a. insertion sort
b. quick sort
c. selection
d. both a and c


Q38. In 32 bit representation, the range of numbers in 2s complement form
 
ANS: 2 to the power of 31 to 2 to the power of 31 minus 1


Q39. About normalization


Q40. Socket is implemented in TCP Layer. Which of the following is related to TCP layer?

ANS: port number


Q41. In re entrant procedure, which should be not used for passing parameters? 

a. passed by reg
b. by direct
c. by indirect
d. by stack


Q43. Flow control is used for


Q44. Flow control is used for ------a. congestion at receiver.


Q45. 5 questions on DBMS are there


Q46. In global static variable, declaration in a file

a. localization of scope
b. persistance of the value through out the file.


Q47. In sorted table contains elements, which of the searching is false

a. hash table
b. binary searching


Q48. In demand paging overhead of context switching is more due to

a. copy processes from disk to memory
b. vice versa
c. to get associative table
d. swapping to the disk


Q49. When write through is better than write back (related to cache memory)?


Q50. Which is false when normalization is used?


  
   






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