Logic Gates problems
- 1. With regard to an AND gate, which statement is true?
Options- A. An AND gate has two inputs and one output.
- B. An AND gate has two or more inputs and two outputs.
- C. If one input to a 2-input AND gate is HIGH, the output reflects the other input.
- D. A 2-input AND gate has eight input possibilities. Discuss
Correct Answer: If one input to a 2-input AND gate is HIGH, the output reflects the other input.
- 2. Logically, the output of a NOR gate would have the same Boolean expression as a(n):
Options- A. NAND gate immediately followed by an inverter
- B. OR gate immediately followed by an inverter
- C. AND gate immediately followed by an inverter
- D. NOR gate immediately followed by an inverter Discuss
Correct Answer: OR gate immediately followed by an inverter
- 3. Which of the following equations would accurately describe a four-input OR gate when A = 1, B = 1, C = 0, and D = 0?
Options- A. 1 + 1 + 0 + 0 = 01
- B. 1 + 1 + 0 + 0 = 1
- C. 1 + 1 + 0 + 0 = 0
- D. 1 + 1 + 0 + 0 = 00 Discuss
Correct Answer: 1 + 1 + 0 + 0 = 1
- 4. Which of the following is not a basic Boolean operation?
Options- A. OR
- B. NOT
- C. AND
- D. FOR Discuss
Correct Answer: FOR
- 5. When reading a Boolean expression, what does the word "NOT" indicate?
Options- A. the same as
- B. inversion
- C. high
- D. low Discuss
Correct Answer: inversion
- 6. The term "hex inverter" refers to:
Options- A. an inverter that has six inputs
- B. six inverters in a single package
- C. a six-input symbolic logic device
- D. an inverter that has a history of failure Discuss
Correct Answer: six inverters in a single package
- 7. If the input to a NOT gate is A and the output is X, then ________.
Options- A. X = A
- B.
- C. X = 0
- D. none of the above Discuss
Correct Answer:
- 8. If the output of a three-input AND gate must be a logic LOW, what must the condition of the inputs be?
Options- A. All inputs must be LOW.
- B. All inputs must be HIGH.
- C. At least one input must be LOW.
- D. At least one input must be HIGH. Discuss
Correct Answer: At least one input must be LOW.
- 9. The Boolean expression for a 3-input AND gate is ________.
Options- A. X = AB
- B. X = ABC
- C. X = A + B + C
- D. X = AB + C Discuss
Correct Answer: X = ABC
- 10. Which of the following logical operations is represented by the + sign in Boolean algebra?
Options- A. inversion
- B. AND
- C. OR
- D. complementation Discuss
Correct Answer: OR
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