The method of accessing the I/O devices by repeatedly checking the status flags is
A. Program-controlled I/O
B. Memory-mapped I/O
C. I/O mapped
D. None
Answer:A
The method of accessing the I/O devices by repeatedly checking the status flags is
A. Program-controlled I/O B. Memory-mapped I/O C. I/O mapped D. None
Explanation: In this method the processor constantly checks the status flags , and when it finds that the flag is set it performs the appropriate operation.