When Do Deadlocks Occur?

A deadlock occurs when 2 processes are competing for exclusive access to a resource but is unable to obtain exclusive access to it because the other process is preventing it. This results in a standoff where neither process can proceed. The only way out of a deadlock is for one of the processes to be terminated.

What is deadlock and when it can occur?

In an operating system, a deadlock occurs when a process or thread enters a waiting state because a requested system resource is held by another waiting process, which in turn is waiting for another resource held by another waiting process.

What are the 4 four conditions required for deadlocks to occur?

mutual exclusion: at least one process must be held in a non-sharable mode. 2. hold and wait: there must be a process holding one resource and waiting for another.