A new IO card has been added to the security server to log the opening and closing of the main entrance. A switch is attached, so the interface card returns a 1 when the door is opened and a 0 when…

The correct answer is C. /dev/gpio. /dev/gpio represents General Purpose Input/Output pins - hardware interfaces that read or write digital high/low (1/0) signals, exactly as described. GPIO is commonly used for sensors, switches, and simple hardware integration. /dev/tty0 is a virtual terminal (console)…

System Management

Question

A new IO card has been added to the security server to log the opening and closing of the main entrance. A switch is attached, so the interface card returns a 1 when the door is opened and a 0 when the door is closed. Which of the following describes the Linux device to which this switch is attached?

Options

A/dev/tty0
B/dev/port
C/dev/gpio
D/dev/sg0

How the community answered

(25 responses)

A
4% (1)
C
96% (24)

Explanation

/dev/gpio represents General Purpose Input/Output pins - hardware interfaces that read or write digital high/low (1/0) signals, exactly as described. GPIO is commonly used for sensors, switches, and simple hardware integration. /dev/tty0 is a virtual terminal (console). /dev/port provides raw access to I/O port addresses in the processor's I/O space. /dev/sg0 is the SCSI generic device interface for SCSI/SAS storage.

Topics

#Linux Device Files#GPIO#Hardware Integration#Peripheral Devices

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