What is the problem of using a pushbutton or a switch as a digital input to a microcontroller. Then, what is the solution(s) of that problem?

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
10th Edition
ISBN:9781337399128
Author:Russell E. Smith
Publisher:Russell E. Smith
Chapter13: Heating Control Devices
Section: Chapter Questions
Problem 30RQ
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What is the problem of using a pushbutton or a switch as a digital input to a microcontroller. Then, what is the solution(s) of that problem?

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