During read operation, the CPU fatches __________. 

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NIELIT Scientific Assistant ECE 5 Dec 2021 Official Paper
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  1. A program instruction 
  2. Address 
  3. Data 
  4. All of the above

Answer (Detailed Solution Below)

Option 4 : All of the above
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The correct answer is: 4) All of the above

Explanation:

  • During a read operation, the CPU may fetch different types of information depending on the stage of the instruction cycle:
  • Program instruction (from memory to execute the next command).
  • Address (to locate data or instructions in memory).
  • Data (operands or values stored in memory or I/O devices).

Thus, the CPU can fetch any of these during a read operation, making "All of the above" the correct choice.

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