In a microprocessor, which is the register that always holds the result of an operation?

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RRB ALP Mechanic Radio & TV 23 Jan 2019 Official Paper (Shift 3)
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  1. Instruction register
  2. Accumulator
  3. Buffer
  4. Data bus

Answer (Detailed Solution Below)

Option 2 : Accumulator
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Detailed Solution

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Accumulator:

  • It is a register used for storing intermediate results of larger computations  It keeps track of the result of any arithmetic or logic operation.
  • Intermediate results of an operation are progressively written to the accumulator, overwriting the previous value.
  • It is an 8-bit register that contains 8 flip-flops. It can store a maximum of 8 bits of data.
  • It is the most frequently used register to store data from memory.
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