3
4
7
8 E. None of the above
Answer is Right!
Answer is Wrong!
The correct answer is A. 3.
An AT-machine is a type of personal computer that was introduced by IBM in 1984. It is based on the Intel 80286 microprocessor and uses the ISA bus. The AT-machine has three DMA channels, which can be used to transfer data directly from a peripheral device to memory without going through the CPU.
Option B is incorrect because the AT-machine has three DMA channels, not four.
Option C is incorrect because the AT-machine has three DMA channels, not seven.
Option D is incorrect because the AT-machine has three DMA channels, not eight.
Option E is incorrect because the AT-machine does have DMA channels.