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Microprocessor

Microprocessor
In Fortran 77 a variable name can contain special characters.

True
False

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Microprocessor
Assertion(A): Address bus is unidirectional. Reason(R): Data bus is bidirectional

 A is true but R is false
 Both A & R are true and R is the correct explanation of A
 A is false but R is true
 Both A & R are true but R is not the correct explanation of A

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Microprocessor
If m is a power of 2, the number of select lines required for an m-input mux is:

log2 (m)
m
2*m
2^m

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Microprocessor
Consider the following I) Sign flag II) Trap flag III) Parity flag IV) Auxiliary carry flag. Which one of the above flags is/are present in 8085 microprocessor?

 (I) & (II)
 (I) ,(III) & (IV)
 (II) & (III)
 (I) only

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Microprocessor
Length of the instruction POP D is

 1 byte
 4 byte
 2 byte
 3 byte

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Microprocessor
Using one 8259 IC is equivalent to providing …………. INTR pins on 8085

 12
 16
 18
 8

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