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Microprocessor

Microprocessor
DMA signal/signals in 8085 is/are

 HLDA.
 All.
 READY.
 HOLD.

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Microprocessor
Assuming LSB is at position 0 and MSB at position 7, which bit positions are not used (Undefined) in flag register of an 8085 microprocessor?

 1, 2, 5
 1, 3, 5
 2, 3, 5
 1, 3, 4

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Microprocessor
Number of Hex digits needed to represent the 20-bit address of a memory location are

 20
 5
 16
 4

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

 Stack Pointer
 B-C
 D-E
 PSW

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Microprocessor
The data lines of 8085 microprocessor are multiplexed with

 higher order address lines
 status lines
 lower order address lines
None of these

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Microprocessor
XCHG instruction exchanges the content of H-L with ______ register pair.

 Stack Pointer
 B-C
 D-E
 PSW

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