61. A one dimensional array A has indices 1....75.Each element is a string and takes up three memory words. The array is stored starting at location 1120 decimal. The starting address of A[49] is

1167

1164

1264

1169

62. Size of the array need not be specified, when

Initialization is a part of definition

It is a declaratrion

It is a formal parameter

All of these

63. If S is an array of 80 characters, then the value assigned to S through the statement scanf("%s",S) with input 12345 would be

"12345"

nothing since 12345 is an integer

S is an illegal name for string

%s cannot be used for reading in values of S

64. If x is an array of interger, then the value of &x[i] is same as

&x[i-1] + sizeof (int)

x + sizeof (int) * i

x+i

none of these

65. What is the maximun number of dimensions an array in C may have?

Two

Eight

Twenty

Theoratically no limit. The only practical limits are memory size and compilers

66. For 'C' programming language

Constant expressions are evaluated at compile

String constants can be concatenated at compile time

Size of array should be known at compile time

All of these

67. O(N)(linear time) is better than O(1) constant time.

True

False

both (a) and (b)

none of these

68. Window NT

security model is based on the notion of user accounts

creates a security access token that includes the security ID for users

NT operates with client server model

all of these

69. Two programs of worm are

grappling hook program

main program

both (a) and (b)

none of these

70. Audit log can be used to

determine how and when the problem occurred

what amount of damage was done

when security has been violated

all of these

71. Worm was made up

one program

two programs

three programs

all of these

72. An audit log

simply records the time

user

type of all access to an object

all of these

73. The security of a system can be improved by

threat monitoring

audit log

both (a) and (b)

none of these

74. Trap door

could be included in a compiler

pose a difficult problem because, to detect them

both (a) and (b)

none of these

75. Threat monitoring technique is

the system can check for suspicious patterns of activity in an attempt to detect a security violation

a time sharing a system that counts the number of incorrect passwords given

both (a) and (b)

none of these

76. Trojan Horse

A code segment that misuses its file is called Trojan horse

good for file accessing

both (a) and (b)

none of these

77. Protection against computer viruses is

preventation

practice of safe computing

purchasing unopened software from vendors

avoiding free or pirated copies from public sources

78. Program threats are

trap doors

Trojan Horse

both (a) and (b)

none of these

79. Viruses

are usually spread by users downloading viral programs from public bulletin boards or exchanging floppy disks containing an infection

are beneficial for program

both (a) and (b)

none of these

80. In one time password

the password is different in each instance

the password is same in each instance

both (a) and (b)

none of these