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Welcome to the Microcontroller 8051 MCQs Page

Dive deep into the fascinating world of Microcontroller 8051 with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Microcontroller 8051, a crucial aspect of Microprocessor. In this section, you will encounter a diverse range of MCQs that cover various aspects of Microcontroller 8051, 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 Microcontroller 8051. 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 Microcontroller 8051. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Microcontroller 8051 MCQs | Page 1 of 13

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Q1.
Which of the following is an 8-bit register?

a.

PSW(Program Status Word)

b.

TCON(Timer Control Register)

c.

Accumulator

d.

all of the mentioned

Discuss
Answer: (d).all of the mentioned
Q2.
Which of the following is not an instruction of 8051?

a.

arithmetic instructions

b.

boolean instructions

c.

logical instructions

d.

none of the above

Discuss
Answer: (d).none of the above
Q3.
The operations performed by data transfer instructions are on

a.

bit data

b.

byte data

c.

16-bit data

d.

all of the mentioned

Discuss
Answer: (d).all of the mentioned
Q4.
Which of the following is true while executing data transfer instructions?

a.

program counter is not accessible

b.

restricted bit-transfer operations are allowed

c.

both operands can be direct/indirect register operands

d.

all of the mentioned

Discuss
Answer: (c).both operands can be direct/indirect register operands
Q5.
The logical instruction that affect the carry flag during its execution is

a.

XRL A;

b.

ANL A;

c.

ORL A;

d.

RLC A;

Discuss
Answer: (d).RLC A;
Q6.
The instruction that is used to complement or invert the bit of a bit addressable SFR is

a.

CLR C

b.

CPL C

c.

CPL Bit

d.

ANL Bit

Discuss
Answer: (c).CPL Bit
Q7.
The instructions that change the sequence of execution are

a.

conditional instructions

b.

logical instructions

c.

control transfer instructions

d.

data transfer instructions

Discuss
Answer: (c).control transfer instructions
Q8.
The control transfer instructions are divided into

a.

explicit and implicit control transfer instructions

b.

conditional and unconditional control transfer instructions

c.

auto control and self control transfer instructions

d.

all of the mentioned

Discuss
Answer: (b).conditional and unconditional control transfer instructions
Q9.
The conditional control transfer instructions check a bit condition which includes any bit of

a.

bit addressable RAM

b.

bit addressable SFRs

c.

content of accumulator

d.

all of the mentioned

Discuss
Answer: (d).all of the mentioned
Q10.
All conditional jumps are

a.

absolute jumps

b.

long jumps

c.

short jumps

d.

none of the above

Discuss
Answer: (c).short jumps
Page 1 of 13

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