Question

What kind of sensor is the ADXL-335 Accelerometer Module?

(a) Passive

(b) Active

(c) Radio

(d) Pressure based

I have been asked this question at a job interview.

The above asked question is from ADXL335 Accelerometer Sensor topic in section Interfacing of Sensors, Actuators, and Other Modules of Arduino

Answer 1

Correct choice is (b) Active

For explanation I would say: The ADXL-335 sensor is an active sensor since it requires an active DC voltage source to function properly. On the contrary, an LDR can be said to be a sort of a passive sensor since it does not require the input of current from an external source for its working.