If the output of a three-input AND gate must be a logic LOW, what must the condi

CuriousTab

CuriousTab

Home Aptitude

Discussion

Home ‣ Digital Electronics ‣ Logic Gates Comments

Question
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.

Correct Answer

At least one input must be LOW.

Logic Gates problems

Search Results

2. 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

5. 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

9. A logic probe is again applied to the pins of a 7421 IC with the following results. Is there a problem with the circuit and if so, what is the problem?
Options
A. Pin 6 should be ON.
B. Pin 8 should be ON.
C. Pin 8 should be pulsing.
D. no problem

Comments

More in Digital Electronics: