The method of accessing the I/O devices by repeatedly checking the status flags is ___________
A)Memory-mapped I/O
B)Program-controlled I/O
C)I/O mapped
D)None of the mentioned

Question

Quizplus · Accepted Answer

Program-controlled I/O, also known as polling, involves the CPU repeatedly checking the status flags of an I/O device to determine if it is ready for data transfer. This method does not use interrupts; instead, the CPU actively waits and checks, consuming its time in the process.

The Method of Accessing the I/O Devices by Repeatedly Checking