Interfacing 7-segment display - MCQs with answers

Interfacing 7-segment display - MCQs with answers

1. What is the purpose of blanking (BI) associated with the 7-segment display operations?

A. To turn ON the display
B. To turn OFF the display
C. To pulse modulate the brightness of display
D. To pulse modulate the lightness of display

a. B & C
b. A & D
c. A & B
d. C & D

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2. How are the port pins of microcontroller are calculated for time-multiplexing types of display?

a. 4 + number of digits to be displayed
b. 4 raised to the number of digits to be displayed
c. 4 – number of digits to be dispalyed
d. 4 x number of digits to be displayed

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3. What does the RAM location at 44H indicates about the seven segment code?

a. 7-segment code for the third character
b. 7-segment code for the fourth character
c. Display of select code for third display
d. Display of select code for fourth display

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