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Which of the following is NOT a function of the Control Unit?

hard Q8 of 15
Computer Aptitude - Computer Hardware
Which of the following is NOT a function of the Control Unit?
AInstruction decoding
BDirecting data flow
CPerforming arithmetic operations
DSending control signals
Step-by-Step Solution

  1. Step 1: List CU functions

    CU decodes instructions and sends control signals.

  2. Step 2: Identify non-CU task

    Arithmetic operations are done by ALU, not CU.

  3. Final Answer:

    Performing arithmetic operations → Option C

  4. Quick Check:

    Arithmetic ≠ CU → Correct ✅
Quick Trick: Math operations never belong to CU.
Common Mistakes:
  • Thinking CU does all processing.
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