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Welcome to the Peripherals and Interfacing with 8086 MCQs Page

Dive deep into the fascinating world of Peripherals and Interfacing with 8086 with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Peripherals and Interfacing with 8086, a crucial aspect of Microprocessor. In this section, you will encounter a diverse range of MCQs that cover various aspects of Peripherals and Interfacing with 8086, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Microprocessor.

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Check out the MCQs below to embark on an enriching journey through Peripherals and Interfacing with 8086. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Microprocessor.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Peripherals and Interfacing with 8086. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Peripherals and Interfacing with 8086 MCQs | Page 4 of 11

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Q31.
Programmable peripheral input-output port is another name for

a.

serial input-output port

b.

parallel input-output port

c.

serial input port

d.

parallel output port

Discuss
Answer: (b).parallel input-output port
Q32.
Port C of 8255 can function independently as

a.

input port

b.

output port

c.

either input or output ports

d.

both input and output ports

Discuss
Answer: (c).either input or output ports
Q33.
All the functions of the ports of 8255 are achieved by programming the bits of an internal register called

a.

data bus control

b.

read logic control

c.

control word register

d.

none of the mentioned

Discuss
Answer: (c).control word register
Q34.
The data bus buffer is controlled by

a.

control word register

b.

read/write control logic

c.

data bus

d.

none of the mentioned

Discuss
Answer: (b).read/write control logic
Q35.
The input provided by the microprocessor to the read/write control logic is

a.

RESET

b.

A1

c.

WR(ACTIVE LOW)

d.

All of the mentioned

Discuss
Answer: (d).All of the mentioned
Q36.
The device that receives or transmits data upon the execution of input or output instructions by the microprocessor is

a.

control word register

b.

read/write control logic

c.

3-state bidirectional buffer

d.

none of the mentioned

Discuss
Answer: (c).3-state bidirectional buffer
Q37.
The port that is used for the generation of handshake lines in mode 1 or mode 2 is

a.

port A

b.

port B

c.

port C Lower

d.

port C Upper

Discuss
Answer: (d).port C Upper
Q38.
If A1=0, A0=1 then the input read cycle is performed from

a.

port A to data bus

b.

port B to data bus

c.

port C to data bus

d.

CWR to data bus

Discuss
Answer: (b).port B to data bus
Q39.
The function, ‘data bus tristated’ is performed when

a.

CS(active low) = 1

b.

CS(active low) = 0

c.

CS(active low) = 0, RD(active low) = 1, WR(active low) = 1

d.

CS(active low) = 1 OR CS(active low) = 0, RD(active low) = 1, WR(active low) = 1

Discuss
Answer: (d).CS(active low) = 1 OR CS(active low) = 0, RD(active low) = 1, WR(active low) = 1
Q40.
The pin that clears the control word register of 8255 when enabled is

a.

CLEAR

b.

SET

c.

RESET

d.

CLK

Discuss
Answer: (c).RESET
Page 4 of 11

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