Which of the following best describes a digital input?
A. either on or off
B. a variable output
C. process up to 10,000 signals per second
D. convert readings to an electrical signal
Answer (2)
A digital input has two states.
The two states are on or off.
The best description of a digital input is either on or off.
Therefore, the answer is either on or off. e i t h ero n oro ff
Explanation
Understanding Digital Inputs A digital input is a type of input that can only have two states: on or off. This is also known as a binary input.
Analyzing the Options Let's analyze the options:
either on or off: This accurately describes a digital input.
a variable output: This describes an analog signal, not a digital one.
process up to 10,000 signals per second: This refers to the processing speed, which isn't the defining characteristic of a digital input.
convert readings to an electrical signal: This is the function of a sensor or transducer, not the digital input itself.
Conclusion Therefore, the best description of a digital input is that it is either on or off.
Examples
Think of a light switch. It's either on or off. Digital inputs work the same way, representing information as either one state (on) or another (off). This is used in computers, microcontrollers, and other digital systems to read signals from sensors, buttons, and other devices. For example, a button connected to a microcontroller acts as a digital input; when pressed, it's 'on,' and when released, it's 'off.'
The best description of a digital input is 'either on or off,' as it represents two distinct states consistent with the binary system. This characteristic defines how digital inputs function in electronic devices. Therefore, the correct answer is option A: either on or off.
;
