What is the first step to the boot process?

• A. Processor begins running the bootstrap program
• B. Device receives power from power supply and sends it into the circuitry
• C. Bootstrap program executes a series of tests to check the components and their settings
• D. Loads operating system files to RAM and kernel, if the tests in the third step are successful

Answer: (B)

Booting starts the moment power is applied to the system. The power supply delivers power to the motherboard and all components, waking everything up and bringing the circuitry into a known state so the CPU and firmware can begin their work. Only after power is stable does the firmware take control to start the boot sequence, leading to POST, loading the bootstrap program, and later loading the OS. That makes the first step the device receiving power from the power supply and sending it into the circuitry. The other steps—processor starting the bootstrap program, running tests, and loading OS files—happen in subsequent stages after power-on.