Beginner
Digital Logic Design
Q36 / 100
What is the purpose of a "pull-up resistor" in a digital logic circuit?
Correct! Well done.
Incorrect.
The correct answer is A) It ensures a signal line defaults to a high logic level when not actively driven low, preventing an undefined "floating" state
A
Correct Answer
It ensures a signal line defaults to a high logic level when not actively driven low, preventing an undefined "floating" state
Explanation
Without a pull-up resistor, an unconnected digital input could float to an unpredictable voltage, potentially being read as either 0 or 1; the pull-up resistor biases it to a known logic-high state by default.
Progress
36/100