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Microprocessor

Microprocessor
Total number of instructions in 8085 microprocessor assembly language is

 247
 245
 246
 244

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Microprocessor
Both the ALU and control section of CPU employ which special purpose storage location?

 Buffers
 Decoders
 Registers
 Accumulators

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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.

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

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Microprocessor
SUB A instruction in 8085

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

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Microprocessor
DMA signal/signals in 8085 is/are

 HOLD.
 HLDA.
 READY.
 All.

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Microprocessor
The first machine cycle of an instruction is always

 An I/O read cycle
 A memory write cycle
 A fetch cycle
 A memory read cycle

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