Deadlock Prevention in Operating Systems

<p>It can be difficult to assign IDs to all resources, especially dynamically created ones. (C)</p> Signup and view all the answers

<p>Deadlock allocation (C)</p> Signup and view all the answers

<p>Prevention is more efficient but less flexible, while avoidance is more flexible but less efficient. (D)</p> Signup and view all the answers

<p>The intersection space (C)</p> Signup and view all the answers

<p>Preemption (B)</p> Signup and view all the answers

<p>More resources must be obtained. (B)</p> Signup and view all the answers

<p>Process priority queue (A)</p> Signup and view all the answers

<p>A state where all processes can complete without blocking. (C)</p> Signup and view all the answers

<p>To prevent deadlock by allocating resources safely. (B)</p> Signup and view all the answers

<p>The process has indicated the maximum amount of each resource it might need. (B)</p> Signup and view all the answers

<p>P1 may request up to 3 units of R1, 2 units of R2, and 2 units of R3. (A)</p> Signup and view all the answers

<p>It indicates the units of each resource currently available in the system. (A)</p> Signup and view all the answers

<p>After every resource allocation. (B)</p> Signup and view all the answers

<p>To accept the possibility of deadlocks and deal with them only when they happen. (C)</p> Signup and view all the answers

<p>Deadlocks are very rare, making complex prevention mechanisms less worthwhile. (A)</p> Signup and view all the answers

<p>By constructing and analyzing a resource allocation graph for cycles. (A)</p> Signup and view all the answers

<p>It can be too drastic and lead to data loss or inconsistencies. (D)</p> Signup and view all the answers

<p>It may require extensive analysis to determine the optimal termination order. (D)</p> Signup and view all the answers

<p>A process is terminated while holding a resource that is not released. (D)</p> Signup and view all the answers

<p>Releasing resources held by terminated processes to avoid inconsistencies. (C)</p> Signup and view all the answers

<p>Deadlocks are infrequent enough that a dedicated, complex approach is not warranted. (C)</p> Signup and view all the answers

<p>Preemption (A)</p> Signup and view all the answers

<p>All of the above (D)</p> Signup and view all the answers

<p>Deadlock resolution (A)</p> Signup and view all the answers

<p>All of the above (D)</p> Signup and view all the answers

<p>A situation where only one process can access a resource at a time (C)</p> Signup and view all the answers

<p>Deadlock detection and recovery (B)</p> Signup and view all the answers

<p>Deadlock prevention aims to prevent deadlocks from occurring, while deadlock avoidance only aims to avoid deadlocks at certain times. (B)</p> Signup and view all the answers

<p>Increasing the priority of the processes involved in the deadlock (D)</p> Signup and view all the answers

<p>Mutual exclusion, hold-and-wait, no preemption, circular wait (A)</p> Signup and view all the answers

<p>Deadlock prevention eliminates one of the four conditions, while avoidance checks for safe states. (A)</p> Signup and view all the answers

<p>The system can allocate resources to processes without falling into deadlock. (B)</p> Signup and view all the answers

<p>Processes can hold certain resources while waiting for others that are currently allocated. (C)</p> Signup and view all the answers

<p>A process's resources cannot be forcibly taken while it is executing. (B)</p> Signup and view all the answers

<p>Processes can request resources gradually as needed, to enhance safety. (D)</p> Signup and view all the answers

<p>Circular wait (D)</p> Signup and view all the answers

<p>General-purpose operating system (B)</p> Signup and view all the answers

<p>P1 may require more R1 than available, leading to a potential deadlock. (C)</p> Signup and view all the answers

<p>6, 2, 3 (A)</p> Signup and view all the answers

<p>This ordering is a safe ordering, but other safe orderings may exist. (B)</p> Signup and view all the answers

<p>To find a safe ordering for processes to avoid deadlocks. (A)</p> Signup and view all the answers

<p>All of the above. (D)</p> Signup and view all the answers

<p>A state where no process can be allocated any resources without risking deadlock. (A)</p> Signup and view all the answers

<p>P2 requires only a small amount of additional resources, which are currently available. (B)</p> Signup and view all the answers

<p>Both Process P1 and Process P3 (B)</p> Signup and view all the answers

High-stakes scenarios where resource pre-allocation avoids deadlocks, like nuclear power control.

Allocating all necessary resources beforehand to ensure availability when needed, preventing deadlocks.

A condition where resources cannot be taken away from processes once allocated.

Enabling removal of resources from processes; often leads to user dissatisfaction.

A condition where processes wait in a loop for resources, causing deadlock.

Assigning unique IDs to resources and accessing them in increasing order to avoid circular wait.

The approach of processes accessing resources in a predetermined sequence to prevent deadlocks.

Resources created as needed, complicating pre-allocation and ordering efforts.

An algorithm used to determine safe state in resource allocation.

A system state where processes can complete without deadlocks.

A state where processes might not complete due to potential deadlock.

A matrix showing maximum resources each process may claim.

A matrix showing currently allocated resources to processes.

A vector showing remaining available resources in the system.

A sequence in which processes are allowed to execute.

A demand made by a process for additional resources.

The process of distributing resources to various processes in an operating system.

A process currently using 1 unit of R1 and needing up to 2 units of R1.

When a process cannot continue executing because it cannot obtain required resources.

A process that can claim up to 6 units of R1 and currently uses 6 units of R1, needing maybe more R3.

The stage when all allocated resources are returned to the system after a process finishes executing.

The method of identifying when deadlocks have occurred in a system.

A graphical representation to track resource allocation and detect deadlocks.

A circular path in a graph that indicates a deadlock situation.

Strategies for resolving a deadlock situation once detected.

Ending a process to resolve a deadlock situation.

Ending a process that has high resource and time costs.

When resources are left in a state that cannot be used effectively.

A situation where processes are stuck waiting for each other, preventing progress.

A condition where resources cannot be shared and are allocated exclusively.

A situation where processes hold onto resources while waiting for others.

Strategies designed to eliminate at least one of the necessary conditions for deadlock.

Temporary removal of conditions to prevent deadlock at specific times.

Allowing deadlocks to occur but having a method to detect and recover from them.

Requesting resources gradually instead of all at once to avoid deadlocks.