Deadlock in Operating Systems

Explain the concept of a resource allocation graph in the context of deadlock in operating systems.

• It is a graph that depicts the allocation of resources to processes and is used to identify and create deadlock.

• It is a graph that depicts the allocation of resources to processes and is used to identify and prevent deadlock.

• It is a graph that depicts the allocation of resources to processes and is used to identify and resolve deadlock.

• It is a graph that depicts the allocation of resources to processes and is used to create and prevent deadlock.

What are the necessary conditions for deadlock to occur?

• Unlimited resources, no mutual exclusion

• Mutual exclusion, hold and wait, no preemption, and circular wait

• Preemption of resources, circular exclusion

• Limited resources, no hold and wait

Discuss one method for deadlock prevention in operating systems.

• Restart the system

• Use resource allocation graph

• Increase the number of processes

• Ignore the deadlock

Explain the concept of deadlock detection and how it is implemented in operating systems.

• Deadlock detection involves periodically checking the system to see if a deadlock has occurred.

• Deadlock detection is implemented by allowing deadlocks to happen

• Deadlock detection involves never checking the system for deadlocks

• Deadlock detection is not necessary in operating systems

What is deadlock avoidance and how does it differ from deadlock prevention?

• Deadlock avoidance carefully allocates resources and schedules processes to prevent deadlock, while deadlock prevention removes one of the necessary conditions for deadlock to occur.

• Deadlock avoidance does not involve resource allocation or process scheduling

• Deadlock avoidance allows deadlock to occur, while deadlock prevention actively tries to create deadlock

• Deadlock avoidance and deadlock prevention are the same thing

Discuss one technique for deadlock recovery in operating systems.

• Memory allocation

• CPU scheduling

• Process termination

• Disk defragmentation

What is the significance of resource allocation graph in understanding deadlock?

• It visually represents the allocation of resources and can help identify potential deadlock situations.

• It only works for a single type of resource

• It has no significance in understanding deadlock

• It is used to speed up the process of resource allocation

How can a system prevent deadlock by using the wait-die and wound-wait schemes?

• By allowing processes to hold onto resources indefinitely

• By randomly assigning resources to processes

• By implementing a priority-based approach to resource allocation

• By ignoring the resource allocation requests

Explain the banker's algorithm and its role in deadlock avoidance.

• It is a scheduling algorithm used to prioritize processes in the system

• It is a deadlock avoidance algorithm used to prevent deadlock by ensuring that the system will always be able to allocate the resources requested by processes in a safe sequence.

• It is a deadlock detection algorithm used to identify when a deadlock has occurred

• It is a memory management algorithm used to allocate memory to processes

Discuss the role of timeouts and resource preemption in deadlock recovery.

• To break the deadlock by forcibly releasing resources from one or more processes involved in the deadlock.

• To encourage the processes to continue waiting for the resources

• To allocate more resources to the processes involved in the deadlock

• To terminate all processes involved in the deadlock