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Microprocessor

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

 PSW
 Stack Pointer
 B-C
 D-E

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

 B-C
 PSW
 D-E
 Stack Pointer

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Microprocessor
The operations executed by two or more control units are referred as

 Bi control-operations
 Multi-operations
 Macro-operations
 Micro-operations

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Microprocessor
Inintel 8085A microprocessor ALE signal is made high to

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

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Microprocessor
During the execution of the instruction, the ________tests the status and control flags and updates them based on the results of executing the instruction.

 None of these
 Execution Unit (EU)
 Bus Interface Unit (BIU)
 Both ‘c’ and ‘d’

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Microprocessor
A mask programmed ROM is

 erasable and programmable
 programmed by the user
 erasable electrically
 programmed at the time of fabrication

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