Q1. A hierarchical memory system that uses cache memory has cache access time of 50 nano seconds, main memory access time of 300 nano seconds, 75% of memory requests are for read, hit ratio of 0.8 for read access and the write-through scheme is used. What will be the average access time of the system both for read and write requests ?

Q2. For switching from a CPU user mode to the supervisor mode following type of interrupt is most appropriate

Q3. In a dot matrix printer the time to print a character is 6 m.sec., time to space in between characters is 2 m.sec., and the number of characters in a line are 200. The printing speed of the dot matrix printer in characters per second and the time to print a character line are given by which of the following options ?

Q4. Match the following 8085 instructions with the flags :

Q5. How many times will the following loop be executed ?
LXI B,
0007 H LOP :
DCX B MOV A,
B ORA C JNZ LOP

Q6. Specify the contents of the accumulator and the status of the S, Z and CY flags when 8085 microprocessor performs addition of 87 H and 79 H.

Q7. Location transparency allows :
I. Users to treat the data as if it is done at one location.
II. Programmers to treat the data as if it is at one location.
III. Managers to treat the data as if it is at one location.
Which one of the following is correct ?

Q8. Which of the following is correct ?
I. Two phase locking is an optimistic protocol.
II. Two phase locking is pessimistic protocol
III. Time stamping is an optimistic protocol.
IV . Time stamping is pessimistic protocol.

Q9. _____________ rules used to limit the volume of log information that has to be handled and processed in the event of system failure involving the loss of volatile information.

Q10. Let R = ABCDE is a relational scheme with functional dependency set F = {AB, BC, ACD}. The attribute closures of A and E are

Q11. Consider the following statements :
I. Re-construction operation used in mixed fragmentation satisfies commutative rule.
II. Re-construction operation used in vertical fragmentation satisfies commutative rule.
Which of the following is correct ?

Q12. Which of the following is false ?

Q13. Which of the following categories of languages do not refer to animation languages ?

Q14. Match the following :

Q15. A technique used to approximate halftones without reducing spatial resolution is known as ____________

Q16. Consider a triangle represented by A(0, 0), B(1, 1), C(5, 2). The triangle is rotated by 45 degrees about a point P(–1, –1). The co-ordinates of the new triangle obtained after rotation shall be _______________

Q17. In Cyrus-Beck algorithm for line clipping the value of t parameter is computed by the relation : (Here P1 and P2 are the two end points of the line, f is a point on the boundary, n1 is inner normal)

Q18. Match the following :

Q19. Consider the following statements S1, S2 and S3 :
S1 : In call-by-value, anything that is passed into a function call is unchanged in the caller’s scope when the function returns.
S2 : In call-by-reference, a function receives implicit reference to a variable used as argument.
S3 : In call-by-reference, caller is unable to see the modified variable used as argument.

Q20. How many tokens will be generated by the scanner for the following statement ? x = x * (a + b) – 5;

Q21. Which of the following statements is not true ?

Q22. The pushdown automation ({q0, q1, q2}, {a, b}, {0, 1}, , q0, 0, {q0}) with
(q0, a, 0) = {(q1, 10)}
(q1, a, 1) = {(q1, 11)}
(q1, b, 1) = {(q2, )}
(q2, b, 1) = {(q2, )}
(q2, , 0) = {(q0, )}
Accepts the language

Q23. Given two languages :
L1 = {(ab)n ak | n > k, k ≥ 0}
L2 = {an bm | n m}
Using pumping lemma for regular language, it can be shown that

Q24. Regular expression for the complement of language L = {an bm | n ≥ 4, m ≤ 3} is

Q25. For n devices in a network, ____________ number of duplex-mode links are required for a mesh topology.

Q26. How many characters per second (7 bits + 1 parity) can be transmitted over a 3200 bps line if the transfer is asynchronous ? (Assuming 1 start bit and 1 stop bit)

Q27. Which of the following is not a field in TCP header ?

Q28. What is the propagation time if the distance between the two points is 48,000 ? Assume the propagation speed to be 2.4 × 108 metre/second in cable.

Q29. _______________ is a bit-oriented protocol for communication over pointto-point and multipoint links.

Q30. Which one of the following is true for asymmetric-key cryptography ?

Q31. Any decision tree that sorts n elements has height

Q32. Match the following :

Q33. We can show that the clique problem is NP-hard by proving that

Q34. Dijkstra algorithm, which solves the single-source shortest--paths problem, is a ______________, and the Floyd-Warshall algorithm, which finds shortest paths between all pairs of vertices, is a _______________.

Q35. Consider the problem of a chain of three matrices. Suppose that the dimensions of the matrices are 10 × 100, 100 × 5 and 5 × 50 respectively. There are two different ways of parenthesization : (i) ((A1 A2)A3) and (ii) (A1(A2 A3)). Computing the product according to the first parenthesization is ___________ times faster in comparison to the second parenthesization.

Q36. Suppose that we have numbers between 1 and 1000 in a binary search tree and we want to search for the number 365. Which of the following sequences could not be the sequence of nodes examined ?

Q37. Which methods are utilized to control the access to an object in multi-threaded programming ?

Q38. How to express that some person keeps animals as pets ?

Q39. Converting a primitive type data into its corresponding wrapper class object instance is called

Q40. The behaviour of the document elements in XML can be defined by

Q41. What is true about UML stereotypes ?

Q42. Which method is called first by an applet program ?

Q43. Which one of the following is not a source code metric ?

Q44. To compute function points (FP), the following relationship is used FP = Count – total × (0.65 + 0.01 × (Fi)) where Fi (i = 1 to n) are value adjustment factors (VAF) based on n questions. The value of n is

Q45. Assume that the software team defines a project risk with 80% probability of occurrence of risk in the following manner : Only 70 percent of the software components scheduled for reuse will be integrated into the application and the remaining functionality will have to be custom developed. If 60 reusable components were planned with average component size as 100 LOC and software engineering cost for each LOC as $ 14, then the risk exposure would be

Q46. Maximum possible value of reliability is

Q47. ‘FAN IN’ of a component A is defined as

Q48. Temporal cohesion means

Q49. Various storage devices used by an operating system can be arranged as follows in increasing order of accessing speed :

Q50. How many disk blocks are required to keep list of free disk blocks in a 16 GB hard disk with 1 kB block size using linked list of free disk blocks ? Assume that the disk block number is stored in 32 bits.

Q51. Consider an imaginary disk with 40 cylinders. A request come to read a block on cylinder 11. While the seek to cylinder 11 is in progress, new requests come in for cylinders 1, 36, 16, 34, 9 and 12 in that order . The number of arm motions using shortest seek first algorithm is

Q52. An operating system has 13 tape drives. There are three processes P1, P2 & P3. Maximum requirement of P1 is 11 tape drives, P2 is 5 tape drives and P3 is 8 tape drives. Currently, P1 is allocated 6 tape drives, P2 is allocated 3 tape drives and P3 is allocated 2 tape drives. Which of the following sequences represent a safe state ?

Q53. Monitor is an Interprocess Communication (IPC) technique which can be described as

Q54. In a distributed computing environment, distributed shared memory is used which is

Q55. Equivalent logical expression for the Well Formed Formula (WFF), ~( x) F[x] is

Q56. An A* algorithm is a heuristic search technique which

Q57. The resolvent of the set of clauses (A B, ~A D, C ~B) is

Q58. Match the following :

Q59. Match the following components of an expert system :

Q60. A computer based information system is needed :
I. as it is difficult for administrative staff to process data.
II. due to rapid growth of information and communication technology.
III. due to growing size of organizations which need to process large volume of data.
IV . as timely and accurate decisions are to be taken.
Which of the above statement(s) is/are true ?

Q61. Given the recursively enumerable language (LRE), the context sensitive language (LCS), the recursive language (LREC), the context free language (LCF) and deterministic context free language (LDCF). The relationship between these families is given by

Q62. Match the following :

Q63. According to pumping lemma for context free languages : Let L be an infinite context free language, then there exists some positive integer m such that any w L with |w|m can be decomposed as w = u v x y z L with |w| m can be decomposed as w = u v x y z

Q64. Given two spatial masks

The Laplacian of an image at all points (x, y) can be implemented by convolving the image with spatial mask. Which of the following can be used as the spatial mask ?

Q65. Given a simple image of size 10 × 10 whose histogram models the symbol probabilities and is given by
The first order estimate of image entropy is maximum when

Q66. A Butterworth lowpass filter of order n, with a cutoff frequency at distance D0 from the origin, has the transfer function H(u, v) given by

Q67. If an artificial variable is present in the ‘basic variable’ column of optimal simplex table, then the solution is

Q68. The occurrence of degeneracy while solving a transportation problem means that

Q69. Five men are available to do five different jobs. From past records, the time (in hours) that each man takes to do each job is known and is given in the following table :
Find out the minimum time required to complete all the jobs.

Q70. Consider the following statements about a perception :
I. Feature detector can be any function of the input parameters.
II. Learning procedure only adjusts the connection weights to the output layer.
Identify the correct statement out of the following :

Q71. A _____________ point of a fuzzy set A is a point xX at which μ A(x) = 0.5

Q72. Match the following learning modes w.r.t. characteristics of available information for learning :

Q73. Which of the following versions of Windows O.S. contain built-in partition manager which allows us to shrink and expand pre-defined drives ?

Q74. A Trojan horse is

Q75. Which of the following computing models is not an example of distributed computing environment ?