In DMA-Based I/O

question 2

Multiple Choice

In DMA-based I/O,

• A) CPU is relieved from data transfer and is interrupted after every word has been transferred to initiate the next word transfer.
• B) cycle stealing can slow down the CPU computation, but off-loading the data-transfer work to a DMA controller generally improves the total system performance.
• C) interrupt mechanism is not used.
• D) data is transferred to/from a single block of memory, but not to/from multiple blocks.

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Definitions:

Neurons

Specialized nerve cells that convey information via electrical and chemical signals in the nervous system.

Myelination

The process by which axons of nerve cells are coated with myelin, a fatty substance that speeds up the transmission of nerve impulses.

Demyelination

A pathological condition in which the myelin sheath covering nerve fibers is damaged, impairing the conduction of electrical signals in the nervous system.

Motor Pathways

Neural pathways that transmit impulses from the brain to control movements in the body.