11. For a Hold and wait condition to prevail : a) A process must be not be holding a resource, but waiting for one to be freed, and then request to acquire it b) A process must be holding at least one resource and waiting to acquire additional resources that are being held by other processes c) A process must hold at least one resource and not be waiting to acquire additional resources d) None of these 12. Deadlock prevention is a set of methods: a) to ensure that at least one of the necessary conditions cannot hold b) to ensure that all of the necessary conditions do not hold c) to decide if the requested resources for a process have to be given or not d) to recover from a deadlock 13. A deadlock avoidance algorithm dynamically examines the circular wait condition can never exist. a) resource allocation state b) system storage state to ensure that a c) operating system d) resources 14. A state is safe, if : a) the system does not crash due to deadlock occurrence b) the system can allocate resources to each process in some order and still avoid a deadlock c) the state keeps the system protected and safe d) All of these