MCQ IN COMPUTER SCIENCE & ENGINEERING

Detailed explanation-1: -By using Buffer registers, the processor sends the data to the I/O device at the processor speed and the data gets stored in the buffer.

Detailed explanation-2: -The programmed I/O method is particularly useful in small low-speed computers or in systems that are dedicated to monitor a device continuously. The difference in information transfer rate between the CPU and the I/O device makes this type of transfer inefficient.

Detailed explanation-3: -A data bus can transfer data to and from the memory of a computer, or into or out of the central processing unit (CPU) that acts as the device’s “engine."Hence, Option 3 is correct.

Detailed explanation-4: -Transparent mode takes the most time to transfer a block of data, yet it is also the most efficient mode in terms of overall system performance. In transparent mode, the DMA controller transfers data only when the CPU is performing operations that do not use the system buses.

Detailed explanation-5: -FTP (File Transfer Protocol) is a common way to transfer bulk data over the Internet.