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Which of the following is NOT a primary purpose of an operating system?

medium Q14 of 15
Computer Aptitude - Operating Systems
Which of the following is NOT a primary purpose of an operating system?
AManaging memory
BControlling input and output devices
CDesigning computer hardware
DAllocating CPU time
Step-by-Step Solution
  1. Step 1: Recall OS responsibilities

    The operating system manages CPU, memory, and devices.
  2. Step 2: Identify the unrelated task

    Designing hardware is done by engineers, not by the OS.
  3. Final Answer:

    Designing computer hardware → Option C
  4. Quick Check:

    OS manages existing hardware, not its design ✅
Quick Trick: OS manages hardware; it does not create hardware.
Common Mistakes:
  • Assuming OS is involved in hardware design.
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