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Microprocessor

Microprocessor
Total number of instructions in 8085 microprocessor assembly language is

 246
 244
 247
 245

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Microprocessor
DMA is used between

 none
 memory and I/O
 microprocessor and I/O
 microprocessor and memory

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Microprocessor
Which instruction is required to rotate the content of accumulator one bit right along with carry?

 RAL
 RLC
 RAR
 RRC

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Microprocessor
HLT opcode means

  load data to accumulator.
  store result in memory.
  load accumulator with contents of register.
  end of program.

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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.

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

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Microprocessor
Inintel 8085A microprocessor ALE signal is made high to

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

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