Question

The key detection and the key identification are two different procedures?

(a) true

(b) false

(c) depends on the circumstances

(d) difficult to tell

I had been asked this question in quiz.

My question is from Keyboard Interfacing in division AVR Microcontroller of Microcontroller

Answer 1

The correct answer is (a) true

To elaborate: The key detection and the key identification are the two different procedures, one is used to detect that whether any key is pressed or not and the other technique is used to find that the pressed key is located in which row and column.