Objective Questions(61-70)

61. In DBMS Which statement is correct
1. Logical data independence is easier than physical data independence
2. Logical data independence is difficult than physical independence
3. Both are easy to achieve
4. Both are difficult to achieve

62. Which header file should be included to use functions like malloc() and calloc()?
A. memory.h B. stdlib.h C. string.h D. dos.h

63. Latch is. . . . . . ??
A) basic memory element.
cross connection of nand or nor gate. C) bistablemultivibrator.
D) all.

64. Nassi - schneiderman charts
A. are being replaced by flowcharts
B. often describe over lapping control structures
C. are made up of boxes within boxes
D. both (a) and (c)

65. Below production
S −→ ACaB
Ca −→ aaC
CB −→ DB
aD −→ Da
aE −→ Ea
AE −→ ε
belongs to which type of grammar
A) Type 0
Type 1
c) Type 2
d) Type 3 

LHS of production is greater than RHS so option A is Correct Type-0(AE → ε)

66. Which of the following relations on {1, 2, 3, 4} is reflexive
a. R = {(1, 1), (1, 2), (2, 3), (3, 3), (4, 4)}
b. R = {(1, 1), (2, 2), (2, 3), (3, 3), (4, 4)}
c. R = {(1, 1), (2, 2), (2, 3), (3, 3)}
d. None of the above 

none of the above because reflexive relations for the set R would be (1,1),(2,2),(3,3) and (4,4). so, in the expressions in relation2 has (2,3). So, none are valid

67. R = {(1, 1), (1, 2), (2, 1), (3, 3), (4, 4)} It is
A. Symmetric B. ASymmetric
c. Anitsymmetric
d. None of the above

68.Modules X and Y operate on the same input and output data, then the cohesion is
(A) Sequential (B) Communicational
(C) Procedural (D) Logical

69. In normalised floating point notation mantissa starts....
1. between 0 and 1
2. Between .1 and 1
3. .1 and .9
4. None of these

70. We have set A with 5 elements ; how many different relation can we have
a. 2^5
b. 2^10
c. 2^25 d. None of the abovec; 

formula is 2^n^2 ;