ISRO2007-41

Question

A task in a blocked state

• A. is executable
• B. is running
• C. must still be placed in the run queues
• D. is waiting for some temporarily unavailable resources

Answer 1

Answer : is waiting for some temporarily unavailable resources

A process that is blocked on some event (such as I/O operation completion or a signal), may be blocked due to various reasons, such as exhausting its CPU time allocation or waiting for an event to occur.

Comments

The answer could be Option C as well. Because even if an I/O operation is the last phase of a task, it'll still have to be placed in the running state to be led to termination.

Option D says "A task in a blocked state is waiting for some temporarily unavailable resources" which is incomplete. It can also be performing an I/O operation.

I understand how Option D would be correct, tho, can you point out why option C is incorrect?

Answer 2

ans is (d)

a process is an instance of a computer program that is being executed. A process always exists in exactly one process state. A process that is blocked is one that is waiting for some event, such as a resource becoming available or the completion of an I/O operation