Which hardware device is a reprogrammable digital logic device whose configuration is set after manufacturing?

• A. SoC
• B. Microcontrollers
• C. FPGA
• D. BACnet

Answer: (C)

An FPGA is a reprogrammable digital logic device whose configuration is set after manufacturing. Its fabric is built from programmable logic blocks and a programmable interconnect, and you define how those blocks are wired together by loading a bitstream that implements the desired circuit. Because the hardware behavior is defined by this configuration, you can change what the device does by loading a different bitstream, enabling hardware customization after deployment. This differs from a microcontroller, where the hardware is fixed and you alter behavior through software running on the built-in CPU. A system-on-a-chip combines processing elements and peripherals on a single die and isn’t primarily described by post-manufacture hardware reconfiguration. BACnet is a communication protocol, not a hardware device. FPGA’s post-manufacture configurability and ability to implement custom hardware logic explain why it best fits the description.