单选题：For operating systems, deadlock means ______________.

For operating systems, deadlock means ______________.@[D](1)
A. A program is looping forever
B. hardware malfunctions
C. system halts
D. processes are blocked and wait for each other to finish




A.A program is looping forever
B.hardware malfunctions
C.system halts
D.processes are blocked and wait for each other to finish


答案：D