Which of the following is a characteristic of an FPGA?

FPGAs, or Field Programmable Gate Arrays, are unique devices that allow users to configure their hardware after manufacture. This characteristic is fundamental to their design; they can be programmed and reprogrammed to implement a wide variety of digital circuits and functionalities as needed.

The ability to reprogram makes FPGAs highly versatile for applications ranging from rapid prototyping to specialized computing tasks that may require updates or alterations in their operational logic. This flexibility means that developers can adapt the FPGA to different requirements or improvements in technology rather than being locked into a specific application.

In contrast, other options suggest limitations that are contrary to the fundamental nature of FPGAs. They are not restricted to a single application nor do they have programming that is fixed at the time of manufacture. Such traits emphasize the adaptability and ongoing usefulness of FPGAs in various contexts within the field of technology.