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Computer Past Papers Solved

1. Which of the following set of UNIX commands will always display “WELCOME”? Title = WELCOME; export title; sh –c “echo $title”
2. Eco system is a Frame work for Building Internet Market
3. The technique of temporarily delaying outgoing acknowledgements so that they can be hooked onto the next outgoing data frame is known as Piggy backing
4. ______ is process of extracting previously non known valid and actionable information from large data to make crucial business and strategic decisions. Data Mining
5. The aspect ratio of an image is defined as The ratio of width to its height measured in unit length.
6. Using RSA algorithm, what is the value of cipher text C, if the plain text M = 5 and p = 3, q = 11 & d = 7? 26
7. You are given an OR problem and a XOR problem to solve. Then, which one of the following statements is true? Problem can be solved using single layer perception and XOR problem can be solved using radial basis function.
8. Let V₁ = 2I – J + K and V₂ = I + J – K, then the angle between V₁ & V₂ and a vector perpendicular to both V₁ & V₂ shall be: 90^০ and (–2I – J + 3K)
9. In classful addressing, an IP address 123.23.156.4 belongs to ______ class format. A (Solved MCQs of Computer Science)
10. The Mandelbrot set used for the construction of beautiful images is based on the following transformation: x_{n + 1}= x²_n+ z          Here Both x & z are complex numbers.
11. Which of the following permutations can be obtained in the output using a stack of size 3 elements assuming that input, sequence is 1, 2, 3, 4, 5? 3, 4, 5, 2, 1
12. In a Linear Programming Problem, suppose there are 3 basic variables and 2 non-basic variables, then the possible numbers of basic solutions are 10
13. Which provides an interface to the TCP/IP suit protocols in Windows95 and Windows NT? Calinsock Active-X Control
14. If dual has an unbounded solution, then its corresponding primal has No feasible solution
15. The number of distinct bracelets of five beads made up of red, blue, and green beads (two bracelets are indistinguishable if the rotation of one yield another) is, 51
16. Which are the classifications of data used in Mobile Applications? Private data, Public data, Shared data.
17. In an enhancement of a CPU design, the speed of a floating point unit has been increased by 20% and the speed of a fixed point unit has been increased by 10%. What is the overall speed achieved if the ratio of the number of floating point operations to the number of fixed point operations is 2 : 3 and the floating point operation used to take twice the time taken by the fixed point operation in original design? 1.62
18. Lamps are to be connected to a single electric outlet by using an extension board each of which has four outlets. The number of extension boards needed to connect all the light is 19
19. Which of the following flags are set when ‘JMP’ instruction is executed? No flag is set
20. A thread is a light weight process. In the above statement, weight refers to Number of resources (Computer Past Papers Solved)
21. The Z-buffer algorithm is used for Hidden surface removal of objects. The maximum number of objects that can be handled by this algorithm shall Be arbitrary no. of objects
22. The power set of AUB, where A = {2, 3, 5, 7} and B = {2, 5, 8, 9} is 64
23. In Win32, which function is used to create Windows Applications? Win Main
24. Suppose a processor does not have any stack pointer registers, which of the following statements is true? All subroutine calls and interrupts are possible.
25. Everything below the system call interface and above the physical hardware is known as Kernel.
26. Which is not the correct statement? The class of regular sets is not closed under inverse homomorphism.
27. When a programming Language has the capacity to produce new data type, it is called as, Extensible Language
28. Which of the following operating system is better for implementing client-server network? Windows 2000
29. Consider a system having m resources of the same type. These resources are shared by 3 processes A, B and C which have peak demands of 3, 4 and 6 respectively. For what value of m deadlock will not occur? 13 (Solved MCQs of Computer Science)
30. The Default Parameter Passing Mechanism is called as Call by Value
31. Which of the following regular expression identities are true? (r + s)* = (r*s*)*
32. Functions defined with class name are called as Constructor
33. Let f be the fraction of a computation (in terms of time) that is parallelizable, P the number of processors in the system, and s_p the speed up achievable in comparison with sequential execution – then the s_p can be calculated using the relation: 1/ [1 – f + f/P]
34. If the parse tree of a word w generated by a Chomsky normal form grammar has no path of length greater than i, then the word w is of length No greater than 2^i–1
35. The Object Modelling Technique (OMT) uses the following three kinds of model to describe a system Object Model, Dynamic Model, and Functional Model.
36. The factors that determine the quality of a software system are Correctness, reliability
37. Skolmization is the process of Removing all the existential quantifiers.
38. Which level of Abstraction describes how data are stored in the data base? Physical level
39. The transform which possesses the “multi-resolution” property is Wavelet transforms
40. Which one is a collection of templates and rules? XSL
41. A program P calls two subprograms P₁ and P₂. P₁ can fail 50% times and P₂ 40% times. Then P can fail 70%
42. Third normal form is based on the concept of Transitive Dependency
43. If the Fourier transform of the function f(x, y) is F(m, n), then the Fourier transform of the function f(2x, 2y) is: 1/4 F(m/2 , n/2)
44. ______ establishes information about when, why and by whom changes are made in software. An Audit Trail.
45. An expert system shell is an expert system without Domain knowledge
46. An example of a dictionary-based coding technique is LZW coding
47. Which is the method used to retrieve the current state of a check box? Get State ( )
48. Referential integrity is directly related to Foreign key
49. A cryptarithmetic problem of the type SEND + MORE MONEY Can be solved efficiently using Constraint satisfaction technique (Solved MCQs of Computer Science)
50. A* algorithm is guaranteed to find an optimal solution if g is always 1.
51. In Delta Rule for error minimization Weights are adjusted w.r.to difference between desired output and actual output
52. The concept of pipelining is most effective in improving performance if the tasks being performed in different stages: require about the same amount of time
53. What is Granularity? The size of data item
54. Suppose that a given application is run on a 64-processor machine and that 70 percent of the application can be parallelized. Then the expected performance improvement using Amdahl’s law is 4.22
55. Which level of Abstraction describes what data are stored in the Database? Logical level
56. The problem that occurs when one transaction updates a database item and then the transaction fails for some reason is Dirty Read Problem
57. In an image compression system 16384 bits are used to represent 256 × 256 image with 256 gray levels. What is the compression ratio for this system? 2
58. X.25 is ________ Network. Connection Oriented Network
59. Which of the following can be used for clustering of data? Self organizing map
60. Which of the following is scheme to deal with deadlock? Time out (Computer Past Papers Solved)
61. If the pixels of an image are shuffled then the parameter that may change is Covariance
62. The common property of functional language and logical programming language: Both are declarative
63. Consider a schema R (A, B, C, D) and functional dependencies A->B and C -> D. Then the decomposition R₁(A, B) and R₂(C, D) is Dependency preserving but not lossless join
64. The quantiser in an image-compression system is a lossy element which exploits the psychovisual redundancy
65. Data Warehouse provides Storage, Functionality Responsiveness to queries