Answer Keys for June 2013 - Computer Science

After researching different resources, I am able to compile Answer keys for June 2013 paper of Computer Science. First, I am posting keys for Paper III as this paper is tougher to clear than othet two papers. I am sure 90% of the answers I have given are correct.
1. A
2. D
3. C
4. B
5. B
6. B
7. C
8. D
9. A or B
10. D
11. C
12. --
13. D
14. D
15. --
16. A
17. A
18. B
19. C
20. D
21. D
22. B
23. C
24. A
25. --
26. A
27. B
28. C
29. D
30. A
31. B
32. A
33. C
34. D
35. D
36. --
37. --
38. B
39. C
40. B
41. C
42. D
43. --
44. B
45. A
46. C
47. B
48. A
49. B
50. A
51. C
52. A
53. A
54. D
55. A
56. --
57. A
58. B
59. --
60. D
61. B
62. A
63. B
64. C
65. B
66. D
67. --
68. D
69. C
70. C
71. B
72. C
73. C
74. --
75. --