DIGITAL ELECTRONICS MCQS SET 13

DIGITAL ELECTRONICS MCQS SET 13

1․ In the boolean algebra, a variable has ________ different state(s)/value(s).
a. 1        b. 2       c. 3          d. 4
Explain:
Boolean Algebra is based on binary number system which has two different states either 1 or 0.
 

2․ In Boolean algebra A.A is equal to
a. A         b. A²         c. 2A         d. 1
Explain:
In Boolean algebra, A.A = A, where A is a variable having value either 1 or 0.
 

3․ AND operation is equivalant to
a. Division        b. Union      c. Intersection     d Both B and C
Explain:
Logical AND operation means Y = A.B i.e. A AND B = A Intersection B. It results in 1, if and only if all the inputs are 1.
 

4․ OR operation is equivalant to
a. Division         b. Union         c. Intersection      d. Both B and C
Explain:
Logical OR operation means A OR B = A Union B (Y = A + B). It results in 1, if at least one input is 1. 

5․ In Boolean algebra AND is represented by
a. +         b. -               c. /             d. ×
Explain:
In Boolean algebra, logical AND is represented by ×, A AND B = A × B.
 

6․ In Boolean algebra, OR is represented by
a. +         b.  -             c. /            d. ×
Explain:
In Boolean algebra logical OR is represented by +, A OR B = A + B.
 

7․ X + X.Y = ?      a. 1         b. 0           c. X         d. Y
Explain:
By applying Absorption property in Boolean algebra,  .

8․ LSI means
a. Large Symbol Integration         b. Large Scale Integration
c. Large Symbol Invertor             d. Large Scale Invertor
Explain:
LSI means Large Scale Integration. The abstraction level of the Integrated circuits are characterized as
1. Small Scale Integration     2. Medium Scale Integration
3. Large Scale Integration      4. Very Large Scale Integration

9․ Truth table is used to express
a. Boolean expression           b. Boolean map
c. Boolean matrix                 d. Boolean addition
Explain:
Truth tables are used to express the Boolean expression. It has 2n no of outputs for n no of inputs. It means for two inputs there is 22 i.e. 4 outputs.
 

10․ Complement of NOR and OR gate is ________ and ________ respectively.
a. AND, NAND    b. NAND, AND             c. OR, NOR         d. NOR, OR
Explain:
OR is the complement of NOR and reverse logic is also true.