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Microprocessor

Microprocessor
Maximum number of I/O that can be addressed by the INTEL 8085 is

 512
 285
 65536
 256

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Microprocessor
Inintel 8085A microprocessor ALE signal is made high to

 To latch data D0-D7 from data bus
 Enable the data bus to be used as low order address bus
 To achieve all the functions listed above
 To disable data bus

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

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

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Microprocessor
The instruction set of a microprocessor

 is stored inside the microprocessor
 cannot be changed by the user
 is specified by the manufacturers
 is specified by the user

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

2*m
2^m
log2 (m)
m

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Microprocessor
Which one of the following instruction may be used to clear the accumulator content irrespective of its initial value?

 MOV A, 00H
 CLR A
 ORA A
 SUB A

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