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Digital Electronics
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Logic Gates
Comments
Question
When reading a Boolean expression, what does the word "NOT" indicate?
Options
A. the same as
B. inversion
C. high
D. low
Correct Answer
inversion
Logic Gates problems
Search Results
1. Which of the following is not a basic Boolean operation?
Options
A. OR
B. NOT
C. AND
D. FOR
Show Answer
Scratch Pad
Discuss
Correct Answer: FOR
2. 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
Show Answer
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Discuss
Correct Answer: 1 + 1 + 0 + 0 = 1
3. 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
Show Answer
Scratch Pad
Discuss
Correct Answer: OR gate immediately followed by an inverter
4. 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.
Show Answer
Scratch Pad
Discuss
Correct Answer: If one input to a 2-input AND gate is HIGH, the output reflects the other input.
5. How many unique symbols are used in the decimal number system?
Options
A. One
B. Nine
C. Ten
D. Unlimited
Show Answer
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Discuss
Correct Answer: Ten
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
Show Answer
Scratch Pad
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
Show Answer
Scratch Pad
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.
Show Answer
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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
Show Answer
Scratch Pad
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
Show Answer
Scratch Pad
Discuss
Correct Answer: OR
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