Operating Systems · Unit 6
Deadlock Management
Exam-focused notes for Deadlock Management (Operating Systems, BIT204): what the TU syllabus asks and how it has actually been tested, with 5 solved past questions from this unit.
What this unit covers
- Deadlock definition
- Necessary conditions for deadlock
- Resource Allocation Graph
- Deadlock detection methods
- Deadlock recovery techniques
- Banker's Algorithm
- Deadlock versus starvation
Banker's Algorithm
Discuss about working mechanism of banker’s algorithm. [5]
The Banker's Algorithm, proposed by Dijkstra, is a deadlock avoidance algorithm used in operating systems. It is named after a banking system where a banker grants loans only if the total amount requested does not exceed available resources, ensuring the ba...
Full solved answer →Resource Allocation Graph and Deadlock Analysis
A Resource Allocation Graph is a directed graph used to model and detect deadlocks in a system. Components: - Process nodes $P = \{P1, P2, \dots, Pn\}$ drawn as circles. - Resource nodes $R = \{R1, R2, \dots, Rm\}$ drawn as rectangles, with dots inside repr...
Full solved answer →Deadlock versus starvation
Differentiate between deadlock and starvation? Discuss the process of detecting deadlocks when there are multiple resources of each type. [5]
--- Aspect Deadlock Starvation --------- Definition A situation where a set of processes are permanently blocked, each waiting for a resource held by another process in the set A situation where a process waits indefinitely because other processes keep gett...
Full solved answer →Deadlock definition
what is deadlock? What ate necessary conditions for deadlock? Explain. [5]
A deadlock is a situation in a multiprogramming environment where a set of processes are blocked permanently because each process in the set is waiting for a resource that is held by another process in the same set. None of the processes can proceed, and th...
Full solved answer →Necessary conditions for deadlock
Why do deadlock occurs? How can you detect and recover from deadlock. [5]
A deadlock occurs when a set of processes are permanently blocked, each waiting for a resource held by another process in the set. Deadlock arises when all four Coffman conditions hold simultaneously: Condition Description ------ Mutual Exclusion At least o...
Full solved answer →Make Unit 6 stick
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