Question

The operation in which CPU waits for a device to be ready for an 1/0 operation is:
(a) Buffering
(b) Spooling
(c) Poling
(d) DMA​

Answer 1

Answer:

Management of I/O devices is a very important part of the operating system - so important and so varied that entire I/O subsystems are devoted to its operation. ( Consider the range of devices on a modern computer, from mice, keyboards, disk drives, display adapters, USB devices, network connections, audio I/O, printers, special devices for the handicapped, and many special-purpose peripherals. )

I/O Subsystems must contend with two ( conflicting? ) trends: (1) The gravitation towards standard interfaces for a wide range of devices, making it easier to add newly developed devices to existing systems, and (2) the development of entirely new types of devices, for which the existing standard interfaces are not always easy to apply.

Answer 2

Answer:

DMA

Explanation:

The operation in which CPU waits for a device to be ready for an 1/0 operation is DMA.

Direct Memory Access (DMA) is a capability provided by some computer bus architectures that allows data to be sent directly from an attached device (such as a disk drive) to the memory on the computer's motherboard. The microprocessor is freed from involvement with the data transfer, thus speeding up overall computer operation.

FINAL ANSWER- DMA

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