問題文
A hosting provider is documenting the startup sequence of its Linux fleet for new staff. A junior engineer asks what actually hands control from the firmware to the running system. Which sequence describes the order correctly?
選択肢
- The kernel is loaded directly by the firmware, which reads the filesystem and locates the kernel image without any boot loader involved.
- The init system runs first and decides which kernel to load, then the boot loader hands the selected kernel a list of units to start.
- Firmware runs, the boot loader loads the kernel and the initial RAM image, the kernel mounts a temporary root and then switches to the real root, and the init system starts the remaining units.
- The initial RAM image is mounted after the real root, so that it can override any driver the real root provides.