If an input device sends data but it does not reach the processor, which path should be checked?

Correct answer: Input controller, port and internal bus

The governing concept is the data path between an input device and the processor. Signals normally pass through the device or input controller, a physical or logical port, and the computer’s internal communication pathway or bus before reaching the CPU. Since the device sends data but the CPU does not receive it, each part of this route should be checked. Printer cartridges, a monitor stand and a speaker cover cannot carry input data, so option A is correct.