Arithmetic Instructions in MCS-51 - MCQs with Answers

Arithmetic Instructions in MCS-51 - MCQs with Answers


Q1. Which flag allow to carry out the signed as well as unsigned addition and subtraction operations ?

a. CY
b. OV
c. AC
d. F0

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ANSWER: b. OV



Q2. How many bytes are supposed to get occupied while subtracting indirect RAM from an accumulator along with borrow under the execution of SUBB A, @Ri?

a. 1
b. 2
c. 3
d. 4

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ANSWER: a. 1



Q3. What can be the oscillator period for the multiplication operation of A & B in accordance to 16-bit product especially in B : A registers?

a. 12
b. 24
c. 36
d. 48

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ANSWER: d. 48


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