UNIT 1-Deadlock prevention

1.For Mutual exclusion to prevail in the system ____________

• a) at least one resource must be held in a non sharable mode

• b) the processor must be a uniprocessor rather than a multiprocessor

• c) there must be at least one resource in a sharable mode

• d) all of the mentioned

2.For non sharable resources like a printer, mutual exclusion ____________

• a) must exist

• b) must not exist

• c) may exist

• d) none of the mentioned

3.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

4.The request and release of resources are ___________

• a) command line statements

• b) interrupts

• c) system calls

• d) special programs

5.What are Multithreaded programs?

• a) lesser prone to deadlocks

• b) more prone to deadlocks

• c) not at all prone to deadlocks

• d) none of the mentioned

6.The disadvantage of a process being allocated all its resources before beginning its execution is ____________

• a) Low CPU utilization

• b) Low resource utilization

• c) Very high resource utilization

• d) None of the mentioned

7.For a deadlock to arise, which of the following conditions must hold simultaneously?

• a) Mutual exclusion

• b) No preemption

• c) Hold and wait

• d) All of the mentioned