Question

If a process needs I/O to or from a disk, and if the drive or controller is busy then :

a) the request will be placed in the queue of pending requests for that drive
b) the request will not be processed and will be ignored completely
c) the request will be not be placed
d) None of these

Answer 1

When a drive or controller is busy, an I/O request will be queued to be processed later, ensuring efficient system operations and prevention of data loss or errors.

Step-by-step explanation:

If a process needs I/O to or from a disk, and if the drive or controller is busy, then the correct answer is that the request will be placed in the queue of pending requests for that drive. This is a standard procedure in operating systems where I/O requests are managed by the I/O scheduler. If the disk is busy, the scheduler will add the request to a queue, and it will be processed when the drive becomes available. Ignoring or not placing the request is not an efficient way to handle I/O operations since it can lead to data loss or system errors.