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1. A deadlocked state occurs whenever: A) a process is waiting for I/O to a device that does not exist B) the system has no available free resources C) every process in a set is waiting for an event that can only be caused by another process in the set D) a process is unable to release its request for a resource after use 2. One necessary condition for deadlock is held in a non-sharable mode. which states that at least one resource must be A) hold and wait B) mutual exclusion C) circular wait D) no preemption 3. One necessary condition for deadlock is one resource and waiting to acquire additional resources. A) hold and wait B) mutual exclusion C) circular wait D) no preemption which states that a process must be holding

1. A deadlocked state occurs whenever: A) a process is waiting for I/O to a device that does not exist B) the system has no available free resources C) every process in a set is waiting for an event that can only be caused by another process in the set D) a process is unable to release its request for a resource after use 2. One necessary condition for deadlock is held in a non-sharable mode. which states that at least one resource must be A) hold and wait B) mutual exclusion C) circular wait D) no preemption 3. One necessary condition for deadlock is one resource and waiting to acquire additional resources. A) hold and wait B) mutual exclusion C) circular wait D) no preemption which states that a process must be holding

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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8. A cycle in a resource-allocation graph is: A) a necessary and sufficient condition for deadlock in the case that each resource has more than one instance B) a necessary and sufficient condition for a deadlock in the case that each resource has exactly one instance C) a sufficient condition for a deadlock in the case that each resource has more than once instance D) is neither necessary nor sufficient for indicating deadlock in the case that each resource has exactly one instance 9. To handle deadlocks, operating systems most often: A) pretend that deadlocks never occur B) use protocols to prevent or avoid deadlocks C) detect and recover from deadlocks D) None of the above
Transcribed Image Text:8. A cycle in a resource-allocation graph is: A) a necessary and sufficient condition for deadlock in the case that each resource has more than one instance B) a necessary and sufficient condition for a deadlock in the case that each resource has exactly one instance C) a sufficient condition for a deadlock in the case that each resource has more than once instance D) is neither necessary nor sufficient for indicating deadlock in the case that each resource has exactly one instance 9. To handle deadlocks, operating systems most often: A) pretend that deadlocks never occur B) use protocols to prevent or avoid deadlocks C) detect and recover from deadlocks D) None of the above
Questions on deadlock: 1. A deadlocked state occurs whenever: A) a process is waiting for I/O to a device that does not exist B) the system has no available free resources C) every process in a set is waiting for an event that can only be caused by another process in the set D) a process is unable to release its request for a resource after use 2. One necessary condition for deadlock is held in a non-sharable mode. , which states that at least one resource must be A) hold and wait B) mutual exclusion C) circular wait D) no preemption 3. One necessary condition for deadlock is one resource and waiting to acquire additional resources. A) hold and wait B) mutual exclusion C) circular wait D) no preemption which states that a process must be holding which states that a resource can be released 4. One necessary condition for deadlock is only voluntarily by the process holding the resource. A) hold and wait B) mutual exclusion C) circular wait D) no preemption 5. One necessary condition for deadlock is processes whereby Po is waiting for a resource held by Pı, Pı is waiting for a resource held by P2. and Pn is waiting for a resource held by Po. A) hold and wait B) mutual exclusion C) circular wait D) no preemption which states that there is a chain of waiting 6. Explain what has to happen for a set of processes to achieve a deadlocked state. 7. In a system resource-allocation graph: A) a directed edge from a process to a resource is called an assignment edge B) a directed edge from a resource to a process is called a request edge C) a directed edge from a process to a resource is called a request edge D) None of the above
Transcribed Image Text:Questions on deadlock: 1. A deadlocked state occurs whenever: A) a process is waiting for I/O to a device that does not exist B) the system has no available free resources C) every process in a set is waiting for an event that can only be caused by another process in the set D) a process is unable to release its request for a resource after use 2. One necessary condition for deadlock is held in a non-sharable mode. , which states that at least one resource must be A) hold and wait B) mutual exclusion C) circular wait D) no preemption 3. One necessary condition for deadlock is one resource and waiting to acquire additional resources. A) hold and wait B) mutual exclusion C) circular wait D) no preemption which states that a process must be holding which states that a resource can be released 4. One necessary condition for deadlock is only voluntarily by the process holding the resource. A) hold and wait B) mutual exclusion C) circular wait D) no preemption 5. One necessary condition for deadlock is processes whereby Po is waiting for a resource held by Pı, Pı is waiting for a resource held by P2. and Pn is waiting for a resource held by Po. A) hold and wait B) mutual exclusion C) circular wait D) no preemption which states that there is a chain of waiting 6. Explain what has to happen for a set of processes to achieve a deadlocked state. 7. In a system resource-allocation graph: A) a directed edge from a process to a resource is called an assignment edge B) a directed edge from a resource to a process is called a request edge C) a directed edge from a process to a resource is called a request edge D) None of the above
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