GK
TECHNOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which interface is an entity that controls data transfer from external device, main memory and or CPU registers?
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Interface Output
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Output Interface
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CPU interface
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Input Output Interface
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Explanation:
Detailed explanation-1: -Explanation: DMA is an interface that provides i/o transfer of data directly to and from the memory unit and the peripheral. In this technique, an external device is used to control data transfer.
Detailed explanation-2: -The hardware device used for direct memory access is called the DMA controller. DMA controller is a control unit, part of I/O device’s interface circuit, which can transfer blocks of data between I/O devices and main memory with minimal intervention from the processor.
Detailed explanation-3: -An interface may receive four types of commands. They are control, status, data input and data output Control command: It is issued to activate the peripheral and to inform it what to do.
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