ユーザーが最初に PC の電源を入れたときのパフォーマンスは良好ですが、使用時間が長くなるほど PC の速度が低下します。また、PC でランダムなシステム クラッシュも発生します。次のどれが最も可能性が高い障害ですか?
正解:B
A failing power supply can cause random system crashes and degraded performance as it struggles to maintain a consistent voltage, especially as the system demands increase over time. The CMOS battery only affects system time and settings, while the video card typically causes display issues rather than system-wide crashes. System memory issues often result in specific errors or performance issues rather than gradual slowdowns. CompTIA A+ Core 1 objectives highlight troubleshooting power supply issues as part of hardware and system maintenance.