Sample mcq questions unit1

1. R.M.K COLLEGE OF ENGINEERING & TECHNOLOGY
DEPARTMENT OF ECE
YEAR:II SEMESTER:III
EC8392-Digital Electronics
UNIT1-DIGITAL FUNDAMENTALS
PART A -MCQ questions

2. X Y Z H
1.0 0 1
0 0 1 0
0 1 0 1
1.1 1 1
2.0 0 1
3.0 1 0
1 1 0 0
1 1 1 1
1.Write the POS form of
Boolean function H, which is
represented in a truth table as
follows:
0 0 0 1
0 0 1 0
0 1 0 1
0 1 1 1
1 0 0 1
1 0 1 0
1 1 0 0
1 1 1 1
X Y Z H
Sample PART B MCQ
Options:
A. H= M(0,2,3,4,7)
B. H= M0+M2 +M3 +M4 +M7
C. H= (X+Y+Z) (X+Y’+Z) (X+Y’+Z’) (X’+Y+Z)
(X’+Y’+Z’)
D. ALL THE ABOVE

3. 2.Identify the logic circuit diagram for the Boolean expression:
X.(Y + Z) from the below options

4. 3.Identify the logic circuit diagram for the Boolean
expression: A.(B+C) from the below options

5. 4. State De-Morgan’s Laws from the below options

6. 5. 8-bit 2’s complement form of (-45)10 is
▪ a) 11010010
▪ b) 11010011
▪ c) 10010011
▪ d) 11010001

7. 6. Decimal equivalent of (2124)5 is
a) 285
b) 284
c) 289
d) 189

8. 7.Reduce the following Boolean expression using
K-map: F(A, B, C, D) = ∑(2, 3, 4, 5, 6, 7, 8, 10, 11)

9. 8. Identify the minimal form for the following
Boolean expression using Karnaugh Map:
H(P, Q, R, S) = ∑(0, 1, 2, 3, 5, 7, 8, 9, 10, 14, 15)

10. 9. Decimal value of the signed magnitude binary number
(11101) is
a) +13
b) - 13
c) + 23
d) – 17

11. 10. The diode shown in the circuits are ideal. The logic
function realized by the Following circuit is
(a)X+Y (b) X.Y (c) (X+Y)’ (d) (X.Y)’