Operating Systems Interview Questions You'll Most Likely Be Asked by Vibrant Publishers

Author:Vibrant Publishers
Language: eng
Format: epub
Tags: Operating Systems

185: What are the conditions for a deadlock?

Answer:

Deadlock may happen due to the following conditions:

a) Mutual Exclusion – There’s at least one resource that’s not sharable and hence can be used only by one process. If another process requests for it, it should wait until its available.

b) Hold & Wait – There’s at least one process that’s holding a resource and waiting for other resources that are held by other processes.

c) No Preemption – The resource will be released only after the process is completed.

d) Circular Wait – A set of processes wherein each process is waiting for a resource held by the proceeding one and the last one is waiting for a resource held by the first process. It becomes a circular wait since every process is waiting for a resource held by the next one and the last one is waiting for the resource held by the first.

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