Microprocessors - ECE Questions and Answers

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In Pascal an array declaration provides information to the Pascal processor to enable it to

identify the variable as an array name

reserve memory locations to store all the components of array

check the values computed for subscripts expressions during program execution with the specified lower and upper limits of subscripts

all of the above

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In which of the following instructions of 8085 are the contents of accumulator complemented?

STC

CMC

CMA

RAL

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Assertion (A): Microprocessors 8086 and 8088 are very similar in organisation and have identical instruction sets.

Reason (R): If clock speed is same the execution time of 8088 and 8086 are exactly equal.

Both A and R are correct and R is correct explanation of A

Both A and R are correct but R is not correct explanation of A

A is correct R is wrong

A is wrong R is correct

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In which of the following logical group instructions of 8085 is the addressing mode 'immediate'?

ANA r

ANA M

ANI data

XRA r

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Which of the following is a valid real constant in FORTRAN 77?

1.2 E 231

3 E - 2

-3.2 E 2.3

1.2 E 23

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Mouse is a very suitable input device for computers.

True

False

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Which of the following instructions have only one operand?

Multiply

Add

Shift

Subtract

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Which of the following is not a keyword in C?

int

float

return

capital

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'Rotate instruction' in microprocessor belongs to

data transfer group

arithmetic group

logic group

branch group