Solution

The Correct Answer is: Option 3

Key Points

• When a computer processes an instruction, it follows a structured sequence of steps to ensure accurate execution.
• The correct sequence is:
  1. Step 1: Fetch the instruction (B) - The CPU retrieves the instruction from memory.
  2. Step 2: Decode the instruction (C) - The CPU interprets the fetched instruction to understand what needs to be done.
  3. Step 3: Calculate the effective address (A) - The CPU determines the address of any operands or data required for execution.
  4. Step 4: Fetch the operands (D) - The CPU retrieves the necessary operands or data from memory.
  5. Step 5: Execute the instruction (E) - The CPU performs the operation specified by the instruction.
• This sequence ensures the CPU processes each instruction correctly.

Additional Information

• Fetch: The instruction is retrieved from memory to the CPU.
• Decode: The CPU decodes the instruction to understand its type and required operation.
• Effective Address Calculation: The CPU calculates the actual memory address needed to fetch operands.
• Operands Fetch: The required data or operands are retrieved from memory.
• Execute: The operation specified in the instruction is carried out.

Hence, the correct sequence is: Option 3) B, C, A, D, E