What is a deadlock and how it occurs?
Deadlock is a situation that occurs in OS when any process enters a waiting state because another waiting process is holding the demanded resource. Deadlock is a common problem in multi-processing where several processes share a specific type of mutually exclusive resource known as a soft lock or software.
What is deadlock and explain it?
A deadlock is a situation in which two computer programs sharing the same resource are effectively preventing each other from accessing the resource, resulting in both programs ceasing to function. The earliest computer operating systems ran only one program at a time. All of the resources of the system were available to this one program.
What do you mean by a deadlock?
In concurrent computing, a deadlock is a state in which each member of a group waits for another member, including itself, to take action, such as sending a message or more commonly releasing a lock. Deadlocks are a common problem in multiprocessing systems, parallel computing , and distributed systems , where software and hardware locks are used to arbitrate shared resources and implement process synchronization .
What’s the difference between deadlock and livelock?
The main difference between livelock and deadlock is that threads are not going to be blocked , instead they will try to respond to each other continuously. In this image, both circles (threads or processes) will try to give space to the other by moving left and right.
Deadlock is a resource contention issue that occurs between two or more than two processes. To handle this problem, we need to clearly understand how it occurs. Deadlocks occur when two processes want to access resources that are mutually being locked by each other. This locked situation can continue forever if nobody stops it.
The main difference between livelock and deadlock is that threads are not going to be blocked, instead they will try to respond to each other continuously. In this image, both circles (threads or processes) will try to give space to the other by moving left and right. But they can’t move any further.
What is the difference between Lock and deadlock?
In these extreme situations, the blocking process may need to be killed and/or redesigned. Deadlock occurs when one process is blocked and waiting for a second process to complete its work and release locks , while the second process at the same time is blocked and waiting for the first process to release the lock .
What is the necessary condition for a deadlock?
Deadlock in OS | Conditions for Deadlock Mutual Exclusion-. There must exist at least one resource in the system which can be used by only one process at a time. Hold and Wait-. There must exist a process which holds some resource and waits for another resource held by some other process. No Preemption-. Circular Wait-.