Answer the following statements true (T) or false (F)

1. Application programs perform I/O operations by sending a logical request to an operating
system service. The operating system responds by converting that logical I/O request to the appropriate physical I/O commands and communicating those commands from the
operating system to the hardware through a hardware/software interface.
2. The interface that controls a peripheral device executes standard machine language
instructions.
3. After a device is opened, the operating system knows it exists and knows how to
communicate with it.
4. The files stored on a disk are identified by name in the disk’s directory.
5. The programmer is concerned with logical I/O.


1. True
2. False
3. True
4. True
5. True

Computer Science & Information Technology

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