hard20 pts · first answer countsbootloaderreliabilitysecurity

Bricked devices after an update

Some devices became unusable when power was lost during an over-the-air firmware update. Which design prevents this?

A.Write the new firmware directly over the running image as fast as possibleB.Ask users not to unplug devicesC.Use a dual-bank (A/B) layout with a bootloader that verifies the signed image and rolls back if the new firmware does not confirm itself after bootD.Update only when the battery is full

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