DMA stands for direct memory access. The DMA controller is a control unit that can transfer blocks of data between I/O devices and main memory with minimal intervention from the CPU. It is also use to speed up the transfer of data between I/O devices and memory.
A DMA Controller transfers 16-bit word to memory using cycle stealing.
The words are assembled from a device that transmits characters at a rate of 2400 characters/sec. The CPU fetching instructions at an average rate of 1 Million instructions/sec. By how much will the CPU be slowed down because of DMA transfer? (Each character is of 8 bits).