Q. for i/o of 8255,if -----, the word is taken as a bit set/rest word
✅ Correct Answer: (B)
D7=0
Microprocessors MCQs | Page - 1
Dear candidates you will find MCQ questions of Microprocessors here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.
Q. on activation of ----, 8255 loads data from the input port lines into the input buffer of that port
✅ Correct Answer: (B)
IBF
Q. in ----, bidirectional data transfer is possible
✅ Correct Answer: (C)
mode2
Q. walkie-talkie is an example of …..serial communication
✅ Correct Answer: (B)
Half duplex
Q. Transmission through telephone lines is an example of….serial commuincation
✅ Correct Answer: (C)
Full Duplex
Q. Asynchronous serial communication involves
✅ Correct Answer: (D)
all of these
Q. to configure 8255 with port A output,Port B input port C lower output and port C upper input
✅ Correct Answer: (B)
mov al,0AEH
Q. A high on ---line indicates that the buffer register is empty
✅ Correct Answer: (B)
TXE
Q. Adc 0808 uses ----technique
✅ Correct Answer: (A)
Successive apraximation
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