Question

Is there an interrupt pin on the RFID Module?

(a) Yes

(b) No

I got this question in an interview for internship.

Query is from RFID Module in chapter Interfacing of Sensors, Actuators, and Other Modules of Arduino

Answer 1

The correct option is (a) Yes

To elaborate: There is an interrupt pin on the RFID Module which keeps the module alert to incoming connection requests from any RFID transmitter that approaches its maximum read range so that it can throw a subsequent software interrupt in order for the new transmitter to function in sync with the receiver.