Which of the following is not a phase of "bathtub curve" of hardware reliability ?
Correct answer: D. Time
- A. Useful Life
- B. Burn-in
- C. Wear-out
- D. Time
Explanation
The bathtub curve has three reliability phases: burn-in or early failures, useful life, and wear-out. Time is the horizontal axis, not a phase of the curve.
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