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What will happen if the two keys of the keyboard are pressed at a time?

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in Microcontroller by (14.6k points)
What will happen if the two keys of the keyboard are pressed at a time?

(a) both the keys will be displayed on the screen

(b) the key which is being actually pressed(for more then 20microseconds) will be displayed

(c) the key that is pressed first will be displayed

(d) none of the mentioned

The question was asked in quiz.

Query is from Keyboard Interfacing topic in portion AVR Microcontroller of Microcontroller

1 Answer

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by (24.2k points)
The correct choice is (b) the key which is being actually pressed(for more then 20microseconds) will be displayed

The explanation is: If two or more keys are pressed at a time, then the key that will be pressed for more then 20 microseconds will be displayed on the screen.

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