25 Questions
What is the consequence of deadlock in a computer system?
All system resources become unavailable
How is starvation different from deadlock?
Starvation affects only a few programs, while deadlock affects the entire system
Which of the following is an example of nonsharable/nonpreemptable resources that can lead to deadlock?
Databases
In what way do deadlocks affect real-time systems differently from interactive systems?
Deadlocks quickly become critical in real-time systems, affecting more than one job
What is the main difference between starvation and deadlock?
Starvation affects only a few programs, while deadlock leads to all system resources becoming unavailable
In the context of disk sharing, what is a characteristic of deadlocks in multiple device allocation?
Two programs need two tape drives each, but there are only two tape drives in the system.
What is a common characteristic of deadlocks in databases?
One user locks out all other users while working with the database.
What is the outcome when locking is not used in a database?
It causes an incorrect final version of data depending on the process execution order.
What happens when the spooling system fills the disk space area in a spooling deadlock?
No single job has the entire print output in the spool area, resulting in partially completed output for all jobs.
What is a potential consequence of not resolving deadlocks in disk sharing?
Results in partially completed output for all jobs and incorrect final version of data.
In Case 1, what is the deadlock sequence involving programs P1 and P2 and files F1 and F2?
P1 has access to F1 F2 and also requires F2 F1; P2 has access to F2 F1 and also requires F1 F2
What is an example of deadlock in Case 2 involving database records?
P1 accesses R1 and locks it; P2 accesses R2 and locks it; P1 requests R2 but locked by P2; P2 requests R1 but locked by P1
What is the deadlock sequence in Case 3 involving limited number of dedicated devices?
P1 requests tape drive 1 and gets it; P2 requests tape drive 2 and gets it; P1 requests tape drive 2 but blocked; P2 requests tape drive 1 but blocked
In Case 4, what is the deadlock sequence involving programs P1, P2, and P3, and dedicated devices (tape drive, printer, plotter)?
P1 requests and gets tape drive; P2 requests and gets printer; P3 requests and gets the plotter; P1 requests printer but blocked; P2 requests plotter but blocked; P3 requests tape drive but blocked
What type of deadlock occurs in the scenario where the spooling system fills disk space with incomplete print output for all jobs?
Deadlocks in spooling
Which of the following conditions is NOT required for a deadlock to occur?
Interrupt-driven I/O
In the context of disk sharing, what is a characteristic of deadlocks related to resource holding?
Holding resource and not releasing it
How can a deadlock be resolved?
By preemption of resources
In the scenario involving seven computers on a network, what leads to the deadlock sequence?
Limited buffer space
What is the main difference between deadlock and livelock in a computer system?
Continuous execution without progress in livelock
Which condition is necessary for deadlock to occur in a computer system?
Circular Wait
What is the strategy for handling deadlocks that involves avoiding deadlock if it becomes probable?
Avoidance
How can deadlock be prevented by ensuring that resources are never assigned exclusively to a single process?
Preempting resources from processes
In the context of modeling deadlocks using directed graphs, what does a cycle in the graph represent?
Processes waiting for resources held by each other
What is the scenario where there is no deadlock because resources are released before the next process request?
Scenario one
Test your knowledge on deadlocks in network communication and disk sharing scenarios. Explore the concepts of deadlock sequences and conflicting commands in a network and disk sharing environment.
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