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Microprocessor

Microprocessor
SPHL instruction copies the content of H-L register pair to the _________.

 D-E
 PSW
 B-C
 Stack Pointer

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Microprocessor
The address bus of any microprocessor is always

 Either unidirectional or bi-directional
 Unidirectional
 None
 Bi-directional

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Microprocessor
It is possible to copy a file in the same directory.

True
False

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Microprocessor
SUB A instruction in 8085

 sets zero and carry flags
 reset zero and parity flags
 sets zero and sign flags
 reset carry and sign flags

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

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

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Microprocessor
DMA is used between

 none
 microprocessor and memory
 microprocessor and I/O
 memory and I/O

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