Deadlock

Question 1

What is Deadlock?

Answer 1

Deadlock is a situation where a set of processes are blocked because each process is holding a resource and waiting for another resource to be acquired by some other process.

Question 2

What conditions are necessary for deadlock to occur?

Answer 2

There are four different conditions that result in Deadlock. Those being:
* Mutual Exclusion - resources are non-shareable
* Hold and wait - processes are able to hold a resource while waiting on others
* No preemption - a resource cannot be removed from a process or released voluntarily by it
* Circular wait - processes form a list or chain where each process is waiting for a resource held by the next process in the chain

Question 3

How can deadlock within a compuer system be resolved?

Answer 3

Deadlock can be resolved by cancelling and restarting the first process.