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Microprocessor

Microprocessor
DMA signal/signals in 8085 is/are

 All.
 HOLD.
 READY.
 HLDA.

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Microprocessor
The execution of RST n instruction causes the stack pointer to

 remain unaffected
 decrement by two
None of these
 increment by two

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Microprocessor
The multiplexing of address bus and data buses is used in

 depends on the internal architecture.
 all the microprocessors.
 none of these.
 never multiplexed.

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Microprocessor
Total number of modes the 8253 can work

 4
 12
 8
 6

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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?

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

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Microprocessor
A sequence of two registers that multiplies the content of DE register pair by two and stores the result in HL register pair (in 8085 assembly language) is

 XCHG & DAD B
 XCHG & DAD H
 PCHL & DAD D
 XTHL & DAD H

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