This set of Switching Circuits Multiple Choice Questions & Answers (MCQs) focuses on “Boolean Algebra Basic Theorems”.
1. Evaluate the boolean expression A + 0.
a) A
b) 0
c) A’
d) 1
View Answer
Explanation: The answer to the above question can be verified using the following truth table.
| A | A + 0 |
|---|---|
| 0 | 0 |
| 1 | 1 |
From the above truth table, it can be verified that A + 0 = A.
2. Evaluate the Boolean expression A.1.
a) 1
b) A’
c) A
d) 0
View Answer
Explanation: The answer to the above question can be verified using the following truth table.
| A | A.1 |
|---|---|
| 0 | 0 |
| 1 | 1 |
From the above table it can be verified that A.1 = A.
3. The Boolean expression A + 1 evaluates to A.
a) True
b) False
View Answer
Explanation: The answer to the above question can be verified using the following truth table.
| A | A + 1 |
|---|---|
| 0 | 1 |
| 1 | 1 |
From the above table it can be verified that A + 1 = 1. Hence the answer is False.
4. The Boolean expression A.0 evaluates to 0.
a) True
b) False
View Answer
Explanation: The answer to the above question can be verified using the following truth table.
| A | A.1 |
|---|---|
| 0 | 0 |
| 1 | 0 |
From the above table it can be verified that A.0 = 0. Hence the answer is True.
5. Evaluate the Boolean expression A + A.
a) A
b) 1
c) 0
d) A’
View Answer
Explanation: The answer to the above question can be verified using the following truth table.
| A | A + A |
|---|---|
| 0 | 0 |
| 1 | 1 |
From the above table it can be verified that A + A = A.
6. Evaluate the Boolean expression A.A.
a) A
b) 1
c) 0
d) A’
View Answer
Explanation: The answer to the above question can be verified using the following truth table.
| A | A.A |
|---|---|
| 0 | 0 |
| 1 | 1 |
From the above table it can be verified that A.A = A.
7. Evaluate the Boolean expression A.A’.
a) A
b) 1
c) 0
d) A’
View Answer
Explanation: The answer to the above question can be verified using the following truth table.
| A | A’ | A.A’ |
|---|---|---|
| 0 | 1 | 0 |
| 1 | 0 | 1 |
From the above table it can be verified that A.A’ = 0.
8. Evaluate the Boolean expression A + A’.
a) A
b) 1
c) 0
d) A’
View Answer
Explanation: The answer to the above question can be verified using the following truth table.
| A | A’ | A + A’ |
|---|---|---|
| 0 | 1 | 1 |
| 1 | 0 | 1 |
From the above table it can be verified that A + A’ = 1.
9. Evaluate the Boolean expression (A’)’.
a) A
b) 1
c) 0
d) A’
View Answer
Explanation: The answer to the above question can be verified using the following truth table.
| A | A’ | (A’)’ |
|---|---|---|
| 0 | 1 | 0 |
| 1 | 0 | 1 |
From the above table it can be verified that (A’)’ = A.
10. Evaluate the Boolean expression A + B + C’ + D +1.
a) A
b) 1
c) 0
d) C’
View Answer
Explanation: As any Boolean expression ORed with 1 result in 1, the answer is 1.
In other words, using the property A + 1 = 1, we get the answer.
Sanfoundry Global Education & Learning Series – Switching Circuits.
To practice all areas of Switching Circuits, here is complete set of 1000+ Multiple Choice Questions and Answers.
