What are device drivers?

• A. They are the main storage units
• B. They execute user applications directly
• C. They manage network protocols only
• D. They act as translators for signals between the OS and hardware/peripherals

Answer: (D)

Device drivers are software components that act as translators between the operating system and hardware or peripherals. When the OS needs to perform input/output, it issues generic commands and requests. The driver takes those requests and converts them into device-specific instructions, handling the hardware’s timing, signaling, and protocol details. It also manages data transfer, interrupts, and power considerations, then returns results to the OS in a standard form. This separation lets software work with a wide variety of hardware without needing to know how each device works internally. The other options miss the core role: storage units are physical media, drivers don’t execute user applications directly, and while network hardware uses drivers, drivers aren’t limited to managing network protocols alone.