One process cannot hold a resource, yet be waiting for another resource that it is holding. So it is not possible to have a deadlock involving only one process.
Can a single process be deadlocked 1 marks?
These definitions imply that for a deadlock to occur there must be AT LEAST two processes. So, the case where a single process tries to re-acquire the same resource is NOT a deadlock.
Can deadlock occur with single resource?
Explanation: When there is only one resource, the conditions of hold and wait and circular wait gets eliminated. With the assumption that no process can use a resource for an infinite amount of time, whenever a process will finish its execution, another process can get the resource. So a deadlock can’t occur.
Can single thread do deadlock?
Yes, a single-threaded application can deadlock if you have locks that are not re-entrant and a thread attempts to reacquire a lock that it owns already (like via a recursive call).
Is deadlocked possible?
A deadlock situation on a resource can arise if and only if all of the following conditions occur simultaneously in a system:Hold and wait or resource holding: a process is currently holding at least one resource and requesting additional resources which are being held by other processes.
How deadlock can be detected and recovered?
If resources have a single instance
In this case for Deadlock detection, we can run an algorithm to check for the cycle in the Resource Allocation Graph. The presence of a cycle in the graph is a sufficient condition for deadlock.
What is deadlock in real life?
A deadlock is a situation that occurs in OS when any process enters a waiting state because another waiting process is holding the demanded resource. A real-world example would be traffic, which is going only in one direction.
What are the necessary conditions to occur deadlock?
4 Conditions for Deadlock
- mutual exclusion: at least one process must be held in a non-sharable mode.
- hold and wait: there must be a process holding one resource and waiting for another.
- No preemption: resources cannot be preempted.
- circular wait: there must exist a set of processes.
Which of the following condition is required for a deadlock to be possible?
Discussion Forum
| Que. | Which of the following condition is required for deadlock to be possible? |
|---|---|
| b. | a process may hold allocated resources while awaiting assignment of other resources |
| c. | no resource can be forcibly removed from a process holding it |
| d. | all of the mentioned |
| Answer:all of the mentioned |
What should be done to avoid deadlock?
How To Avoid Deadlock
- Avoid Nested Locks: A deadlock mainly happens when we give locks to multiple threads. Avoid giving a lock to multiple threads if we already have given to one.
- Avoid Unnecessary Locks: We can have a lock only those members which are required.
- Using Thread.
Can a deadlock happen with three threads?
Thread Deadlock
Deadlock can occur when multiple threads need the same locks, at the same time, but obtain them in different order.
What is an unsafe state?
safe and unsafe state. if there is no allocation sequence that allows the processes to finish executing, then the system is in an unsafe state. This is not equivalent to the “If the system is in an unsafe state, then there is no allocation sequence that allows the processes to finish executing.
What happens when a process being allocated all its resources before beginning its execution?
11)The disadvantage of a process being allocated all its resources before beginning its execution is : Low resource utilization.
How do you get Clubstep in Geometry Dash Lite?
Clubstep is the fourteenth level of Geometry Dash and the first level with a Demon difficulty. 10 secret coins are required to unlock the level.
What demon difficulty is Clubstep?
easy demon
Clubstep|easy demon(who read it clubste pleasy :D.
What difficulty is Theory of Everything 2?
Demon difficulty
Theory of Everything 2 is the eighteenth level of Geometry Dash and the second level with a Demon difficulty. 20 secret coins are required to unlock the level.
What is a deadlock and how can it be avoided?
In order to avoid deadlock, you have to acquire a lock in the fixed order.Once process1 commits the transaction successfully, it will release the locks on the resources; therefore process 2 will get the required resources in order to complete the transaction successfully without getting into the deadlock.
How do you know if you have a deadlock?
Deadlock can arise if the following four conditions hold simultaneously:
- The first condition is mutual exclusion.
- The second necessary condition for deadlock is the hold and wait or resource holding.
- The third condition is no preemption.
- The final condition for deadlock is the circular wait.
What is the approach of an operating system to detect a deadlock for single instance of resource type and multiple instance of resource type explain with example?
If all resources have only a single instance, then we can define a deadlock-detection algorithm that uses a variant of the resource-allocation graph, called a wait-for graph.
What is the difference between deadlock and starvation?
The main difference between deadlock and starvation is that deadlock occurs when each process holds a resource and waits to obtain a resource held by another process while starvation occurs when a process waits for an indefinite period of time to obtain a required resource.
What is Live Lock and deadlock?
A deadlock is a situation that occurs when processes block each other with resource acquisition and makes no further progress. Livelock is a deadlock-like situation in which processes block each other with a repeated state change yet make no progress.
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