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Microprocessor

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

 Stack Pointer
 PSW
 B-C
 D-E

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Microprocessor
Using DeMorgan’s Theorem we can convert any AND-OR structure into

NAND-NOR
NAND-NAND
NOR-NAND
OR-NAND

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Microprocessor
The content of the A15-A8 (higher order address lines) while executing “IN 8-bit port address” instruction are

 irrelevant
 all bits reset (i.e. 00H)
 same as the content of A7-A0
 all bits set (i.e. FFH)

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Microprocessor
The relation among IC (Instruction Cycle), FC (Fetch cycle) and EC (Execute Cycle) is

 IC = FC - EC
 IC = FC + EC
 EC = IC + FC
 IC = FC + 2EC

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Microprocessor
A microprocessor differentiates between op code, data/address at any time by

 the stack pointer
 the program counter
 its internal registers
 the sequence in which memory contents are fetched by it

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Microprocessor
While STC instruction executes,

 no flags will be affected.
 all flags will be affected.
 only carry flag will be affected.
 only carry and zero flags will be affected.

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MORE MCQ ON Microprocessor

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