Deadlock Avoidance in Resource Management

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What is a cycle in the resource allocation graph?

A necessary condition for a deadlock (correct)

An indication of a fully utilized system

A sufficient condition for a deadlock

An error in the resource allocation

How can deadlocks be handled according to the text?

Using deadlock prevention methods to ensure necessary conditions cannot hold (correct)

Handling deadlocks by avoiding all resource allocation

Allowing the system to enter a deadlocked state and recovering from it

Ignoring the problem and assuming deadlocks never occur

What is the main goal of deadlock prevention?

To ignore the existence of deadlocks

To ensure that at least one necessary condition for deadlock cannot hold (correct)

To allow the system to enter a deadlocked state

To recover from deadlocks efficiently

In the resource allocation graph, what does a cycle indicate?

Presence of potential deadlock Signup and view all the answers

Which statement best describes the relationship between cycles and deadlocks in a resource allocation graph?

Cycles are necessary conditions but not sufficient conditions for deadlocks Signup and view all the answers

What is the purpose of handling deadlocks in an operating system?

To ensure systems never enter a deadlocked state Signup and view all the answers

What does the 'Mutual exclusion' condition in operating systems refer to?

Only one process can use a specific resource at a time Signup and view all the answers

Which condition of the deadlock problem states that a process holding at least one resource is waiting for another resource held by a different process?

Hold and wait Signup and view all the answers

In terms of resource management, what does 'No preemption' imply in an operating system?

Processes can release resources only after they have voluntarily completed their task Signup and view all the answers

What is the characteristic of 'Circular wait' in the context of the deadlock problem in operating systems?

Multiple processes are waiting indefinitely for a resource held by another process in a circular manner Signup and view all the answers

To avoid deadlocks, which of the following strategies focuses on breaking one of the conditions necessary for deadlocks to occur?

Deadlock Prevention Signup and view all the answers

In the context of resource allocation graphs, what does the presence of a cycle indicate?

A deadlock is certain to happen Signup and view all the answers

What is the purpose of a deadlock-avoidance algorithm in an operating system?

To dynamically examine the resource-allocation state to prevent circular-wait conditions Signup and view all the answers

In the context of deadlock avoidance, when is a system considered to be in a safe state?

When resources can be allocated to each process up to its maximum in some order without causing a deadlock Signup and view all the answers

How does the concept of 'resource-allocation state' contribute to deadlock avoidance?

It indicates the number of available and allocated resources, and maximum demands of processes Signup and view all the answers

What defines a 'safe sequence' in the context of deadlock avoidance?

A sequence where resources requested by each process can be satisfied by currently available resources and those held by other processes Signup and view all the answers

Which characteristic distinguishes a 'safe state' from an 'unsafe state' in deadlock avoidance?

In a safe state, the system can allocate resources such that no circular-wait condition arises; in an unsafe state, circular-wait conditions may occur Signup and view all the answers

How does the deadlock-avoidance model differ from other resource management strategies in operating systems?

It dynamically examines the resource-allocation state to prevent circular-wait conditions Signup and view all the answers

Deadlock Avoidance in Resource Management

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