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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 8 of 13

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Q71.
Which of the following is not an unconditional control transfer instruction?
Discuss
Answer: (c).JNC
Q72.
The conditional control transfer instructions use
Discuss
Answer: (d).all of the mentioned
Q73.
Which of the following is not a conditional control transfer instruction?
Discuss
Answer: (d).All are conditional control transfer instructions
Q74.
The mnemonic used to perform a subtraction of source with an 8-bit data and jumps to specified relative address if subtraction is non-zero is
Discuss
Answer: (b).CJNE
Q75.
The mnemonic, JNB is used to jump to the specified relative address only if
Discuss
Answer: (a).specified bit=1
Q76.
The type of operand that is not allowed to use in boolean instructions of 8051 is
Discuss
Answer: (c).immediate bit
Q77.
In boolean instructions, the flag that is the only allowed destination operand for two operand instructions is
Discuss
Answer: (d).carry flag
Q78.
Which of the following is not one of the SFR addresses of the ports of 8051?
Discuss
Answer: (d).All are SFR addresses of the ports of 8051
Q79.
Each port line of a port can individually source a current of upto
Discuss
Answer: (c).0.5 mA
Q80.
Each port line of a port can individually sink a current of upto
Discuss
Answer: (b).8 mA

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