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Welcome to the 8051 Microcontroller MCQs Page

Dive deep into the fascinating world of 8051 Microcontroller with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of 8051 Microcontroller, a crucial aspect of Computer Architecture. In this section, you will encounter a diverse range of MCQs that cover various aspects of 8051 Microcontroller, 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 Computer Architecture.

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Check out the MCQs below to embark on an enriching journey through 8051 Microcontroller. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Computer Architecture.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of 8051 Microcontroller. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

8051 Microcontroller MCQs | Page 1 of 14

Q1.
8051 series of micro controllers are made by which of the following companies?
Discuss
Answer: (d).Both of the mentioned
Q2.
AT89C2051 has RAM of:
Discuss
Answer: (b).256 bytes
Q3.
8051 series has how many 16 bit registers?

a.

2

b.

3

c.

1

d.

0

Discuss
Answer: (a).2
Q4.
When 8051 wakes up then 0x00 is loaded to which register?
Discuss
Answer: (c).PC
Q5.
When the micro controller executes some arithmetic operations, then the flag bits of which register are affected?
Discuss
Answer: (a).PSW
Q6.
How is the status of the carry, auxiliary carry and parity flag affected if write instruction
MOV A,#9C
ADD A,#64H
Discuss
Answer: (b).CY=1,AC=1,P=0
Q7.
How are the bits of the register PSW affected if we select Bank2 of 8051?
Discuss
Answer: (d).PSW.3=0 and PSW.4=1
Q8.
If we push data onto the stack then the stack pointer
Discuss
Answer: (a).increases with every push
Q9.
On power up, the 8051 uses which RAM locations for register R0- R7
Discuss
Answer: (b).00-07
Q10.
How many bytes of bit addressable memory is present in 8051 based micro controllers?
Discuss
Answer: (c).16 bytes
Page 1 of 14

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