Microprocessors MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Microprocessors, a fundamental topic in the field of Electronics and Communication Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Microprocessors MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Microprocessors mcq questions that explore various aspects of Microprocessors problems. Each MCQ is crafted to challenge your understanding of Microprocessors principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Electronics and Communication Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Microprocessors MCQs are your pathway to success in mastering this essential Electronics and Communication Engineering topic.

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

So, are you ready to put your Microprocessors knowledge to the test? Let's get started with our carefully curated MCQs!

Microprocessors MCQs | Page 40 of 59

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Q391.
The general purpose register code for accumulator in 8085 is
Discuss
Answer: (a).111
Q392.
Which of the following is not an internal DOS command?
Discuss
Answer: (c).MEM
Discuss
Answer: (b).TRAP and RST lines are not high
Q394.
Consider the following statements

1. The sign of a floating point number depends on the sign of mantissa only.
2. If the absolute value of a number is less than 1, the sign of exponent is zero or positive.
3. With sign bit of mantissa as 0, increasing the exponent from a positive to a more positive value gives a larger floating point number.

Which of the above are correct?
Discuss
Answer: (c).1 and 3 only
Q395.
Assertion (A): In microprocessor 8085 instruction LXIB, 90 FF H means register B and C are loaded with upper and lower bytes to get B = 90 H and C = FFH.

Reason (R): In 8085 the stack pointer indicates which memory location is to accessed.
Discuss
Answer: (b).Both A and R are correct but R is not correct explanation of A
Q396.
To add 8 bit words, two IC 74181 can be cascaded.
Discuss
Answer: (a).True
Q397.
The initial contents of ACC and CY in 8085 are

1. CY = 1
2. ACC = 10000001

After instruction RAL is executed once the contents of CY and ACC respectively will be
Discuss
Answer: (a).1 and 00000011
Discuss
Answer: (a).The general form of an array variable is an integer or a real variable name followed by subscripts enclosed within square brackets. The subscripts are separated by commas
Q399.
In 8085, which of the following is an 8 bit register?
Discuss
Answer: (a).A
Discuss
Answer: (a).Load the program counter with contents of register pair H L