Sunday, May 20, 2012

UGC NET Computer Science and Application December 2009 Solution

1. If she is my friend and you are her friend, 
then we are friends. Given this, the friend relationship 
in this context is ________________.
(i) Commutative (ii) transitive (iii) implicative (iv) equivalence
(A) (i) and (ii)                                                  (B) (iii) 
(C) (i),(ii),(iii) and (iv)                                   (D) None of these

2. Circle has ________ 
(A) No vertices                                         (B) only 1 vertex 
(C) vertices                                                (D) None of these

8. The highest noise margin is offered by
(A) BICMOS                                              (B) TTL 
(C) ECL                                                       (D) CMOS

9. The answer of the operation (10111)2 * (1110)
in hex equivalence is
(A) 150                                                    (B) 241 
(C) 142                                                     (D) 101011110

10. How many ‘1’ are present in the binary representation of 
3 X 512 + 7 X 64 + 5 X 8 + 3
(A) 8                                                     (B) 9 
(C) 10                                                    (D) 11

11. Recursive functions are executed in a 
(A) First in first out order                         (B) Last in first out order
(C ) Parallel fashion                                    (D) Load Balancing

12. What would be the output of the following program, 
if run from the commandline as “myprog 1 2 3”?
main(int argc,char *argv[])
int i;
(A) 123                                                (B) 6 
(C) Error                                             (D) “123”

13. A ________________ is a special method used to initialize 
the instance variable of a class.
(A) Member function                                 (B) Destructor
 (C) Constructor                                         (D) structure

14. Encapsulation is
(A) Dynamic binding   (B) A mechanism to associate the code and data
(C ) Data abstraction   (D ) Creating new class

15. Which of the statements are true?
I. Function overloading is done at compile time.
II. Protected members are accessible to the member of a derived class.
III. A derived class inherits constructors and destructors
IV. A friend function can be called like a normal function.
V. Nested class is a derived class.
(A) I,II,III                                              (B) II,III,V 
(C) III,IV,V                                            (D) I,II,IV

16. The E-R model is expressed in terms of 
I. Entities
II. The relationship among entitites
III. The attributes of the entities.
IV. Functional relationship.
(A) I,II                                                (B) I,II, IV 
(C) II,II,IV                                         (D) I,II,IV

17. Specialization is ________________process.
(A) top-down                                           (B) bottom up
(C ) both (A) and (B)                               (D) none of these

18. Match the following:
(1) Determinants                  (a) No attributes
(2) Candidate key                 (b) Uniquely identified a row
(3) Non-redundancy            (c ) A constraint between two attributes
(4) Functional dependency (d) Group of attributes on the left hand side of arrow 
of function dependency
(A) 1 – d, 2 – b, 3 – a, 4 – c                      (B) 2 – d, 3 – a, 1- b, 4 – c
(C) 4 – a, 3 – b, 2 – c, 1 – d                      (D) 3 – a, 4 – b, 1 – c, 2 – d

19. A function that has no partial functional 
dependencies is in _____________ form.
(A) 3 NF                                                        (B) 2 NF 
(C) 4 NF                                                        (D) BCNF

20. Which of the following statement is wrong?
I. 2-phase locking protocol suffer from dead lock.
II. Time stamp protocol suffer from more aborts.
III. A block hole in a DFD is a data store with only inbound flows.
IV. Multivalued dependency among attribute is checked at 3 NF level.
V. An entity-relationship diagram is a tool to represent event model.
(A) I ,II,III                                             (B) II,III,IV 
(C) III,IV,V                                           (D) II,IV,V

21. If the number of leaves in a strictly binary tree 
is an odd number, then what can you say with full conviction 
about total number of nodes in a tree? 
(A) It is an odd number.                                          (B) It is an even number.
(C ) It cannot be equal to the number of leaves. (D ) It is always greater than twice the number of leaves.

22. The number of edges in a complete graph of n vertices is
(A) n                                                        (B) n(n-1)/2 
(C ) n(n+1)/2                                           (D) n2/2

23. At a hill station, the parking lot is one long drive way snaking up a hill side. 
ars drive in and park right behind the car in front of them, one behind another.
A car can’t leave until all the cars in front of it have left. Is the parking lot more like 
(A) An array                                                  (B) A stack
(C) A queue                                                  (D) A linked list

24. With regard to linked list, which of the following statement is false ?
(A) An algorithm to search for an element in a singly linked list requires O(n) operations in the worst case. 
(B) An algorithm for deleting the first element in a singly linked list requires o(n) operations in the worst case.
(C ). An algorithm for finding the maximum value in a circular linked list requires o(n) operations.
(D ). An algorithm for deleting the middle node of a circular linked list requires o(n) operations. 

25. A hash function f defined as f(key)=key mod 7, with linear probing used to resolve collisions.
Insert the keys 37,38,72,48,98 and 11 into the table indexed from 0 to 6. What will be the location of 11?
(A) 3                                                    (B) 4
(C ) 5                                                    (D) 6

26. Device on one network can communicate with devices on another network via a 
(A) Hub/switch                                                (B) Utility server
( C) File server                                                 (D) Gateway

27. What is the maximum window size in 
sliding window protocol used in a computer network?
(A) 4                                                                   (B) 8 
(C ) 15                                                                (D) 16

28. Which of the following are Data Link Layer standard?
1. Ethernet 2. HSSI 3. Frame Relay
4. 10-Base T 5. Token Ring
(A) 1,2,3                                               (B) 1,3,5
(C) 1,3,4,5                                            (D) 1,2,3,4,5

29. In case of Bus/Tree topology signal balancing issue is overcome by
(A) Modulation                                                (B) Polling
(C ) Segmentation                                            (D) Strong transmitter

30. Match the following:
(i) Ethernet (a) Deterministic
(ii) Token Ring (b) Utilize the full wire speed
(iii) Cut-through switch (c ) Prevent Looping
(iv) Spanning tree (d) Checking valid address
(A) i-d,ii-a,iii-b,iv-c                                    (B) i-a,ii-d,iii-b,iv-c
(C ) i-d,ii-d,iii-c,iv-b                                   (D) i-d,ii-c,iii-b,iv-a

31. In an absolute loading scheme which loader function is accomplished by assembler?
(A) re-allocation                                  (B) allocation 
(C ) linking                                            (D) loading

32. Which of the following grammar is LR(1)?

33. A shift-reduce parser carries out the actions specified within braces immediately 
after reducing with the corresponding rule of the grammar.
S->xxW[ print “1” ]
S->y [ print “2” ]
W->S2 [ print “3” }, what is the translation of “x x x x y z z”?
(A) 1 1 2 3 1                                            (B) 1 1 2 3 3
(C) 2 3 1 3 1                                            (D) 2 3 3 2 1

34. Context-free Grammar(CFG) can be recognized by
(A) Finite state automata               (B) 2-way linear bounded automata
(C ) push down automata               (D ) Both (B) and (C)

35. Synthesized attribute can be easily simulated by a 
(A) LL grammar                                    (B) Ambiguous grammar
(C ) LR grammar                                   (D) None of the above

36. In the process management Round-robin method is essentially
the pre-emptive version of _______________.
(A) FILO                                          (B) FIFO
(C ) SSF                                            (D) Longest time first

37. A page fault
(A) is an error specific page
(B) is an access to the page not currently in memory
(C ) occur when a page program occur in a page memory.
(D ) page used in the previous page reference.

38. A semaphore count of negative n means (s=-n) 
that the queue contains ___n__________ waiting processes.
(A) n + 1                                         (B) n 
(C) n – 1                                         (D) 0

39. A program is located in the smallest available 
hole in the memory is ______________
(A) best-fit                                             (B) first-bit 
(C ) worst-fit                                         (D ) buddy

40. The unix command used to find out the number of characters in a file is
(A) nc                                                       (B) wc 
(C ) chcnt                                                 (D) lc

41. Software Engineering is a discipline that integrates __________ 
for the development of computer software.
(A) Process                                           (B) Methods
(C ) Tools                                               (D) All

42. Any error whose cause cannot be identified anywhere within the 
software system is called _________________.
(A) Internal error                                        (B) External error
(C ) Inherent error                                      (D) Logic error

43. Recorded software attributes can be used in the following endeavours:
(i) Cost and schedule estimates.
(ii) Software product reliability predictions
(iii )Managing development process
(iv). No where
(A) (i) (ii) (iv)                                                  (B) (ii) (iii) (iv)
(C) (i) (ii) (iii)                                                  (D) (i) (ii) (iii) (iv)

44. Black box testing is done
(A) To show that s/w is operational at its interfaces i.e. input and output.
(B) To examine internal details of code
(C) At client side
(D) None of the above

45. The name of the transaction file shall be provided by the operator 
and the file that contains the edited transactions ready for execution shall be called
(A) Batch.exe                                             (B) Trans.exe
(C ) Opt.exe                                                (D) Edit.exe

46. The single stage network is also called
(A) One sided network                               (B) two sided network
(C ) recirculating network                         (E) pipeline network

47. Analysis of large database to retrieve information is called
(A) OLTP                                                      (B) OLAP 
(C ) OLDP                                                     (D) OLPP

48. Which technology is sometime referred to as wireless cable?
(A) MMDS                                                   (B) ATM 
(C ) LMDS                                                    (D) CDMA

49. Another name of IEEE 802.11 a is ______________
(A) Wi-Max                                                  (B) Fast Ethernet
(C) Wi-fi                                                        (D) 802.11 g

50. The unlicensed National Information Infrastructure 
band operates at the ____________frequency
(A) 2.4 GHz                                                     (B) 5 GHz 
(C ) 33 MHz                                                    (D) 5 MHz

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