Technician a Says That a Switch in a "Pull-Up Circuit

Multiple Choice

Technician A says that a switch in a "pull-up circuit" provides voltage to the computer when it is closed. Technician B says that a switch in a "pull-down circuit" provides a ground to the computer when it is closed. Who is correct?

A) Technician A only
B) Technician B only
C) Both technicians
D) Neither technician