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Questions and Answers
What is a deadlock in operating systems?
What is a deadlock in operating systems?
- A situation where multiple processes are executing simultaneously
- A situation where a process is executing and another process is waiting for it to finish
- A situation where a process is holding a resource and waiting for another resource acquired by some other process (correct)
- A situation where a process is waiting for a resource to be released by another process
How many necessary conditions are required for a deadlock to occur?
How many necessary conditions are required for a deadlock to occur?
- Three
- Four (correct)
- Five
- Six
What is the 'hold and wait' condition in deadlock?
What is the 'hold and wait' condition in deadlock?
- A process is waiting for a resource to be released by another process
- A process is holding a resource and waiting for another resource to be released (correct)
- A process is holding multiple resources and waiting for another resource to be released
- A process is executing and waiting for another process to finish
What is not a necessary condition for a deadlock to occur?
What is not a necessary condition for a deadlock to occur?
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What is the main problem that deadlock causes in operating systems?
What is the main problem that deadlock causes in operating systems?
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Study Notes
Deadlock in Operating Systems
- Deadlock is a situation where a set of processes are blocked because each process is holding a resource and waiting for another resource acquired by some other process.
Conditions for Deadlock to Happen
- There are four necessary conditions for deadlock to occur:
Mutual Exclusion
- Mutual Exclusion: a condition where two or more processes require exclusive access to a common resource.
Hold and Wait
- Hold and Wait: a condition where a process is holding a resource and waiting for another resource.
No Pre-emption
- No Pre-emption: a condition where a resource cannot be forcefully taken from a process holding it.
Circular Wait
- Circular Wait: a condition where a process is waiting for a resource held by another process, which in turn is waiting for a resource held by the first process, forming a circular chain of waiting processes.
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Description
Understand the concept of deadlock in operating systems with real-life examples, including the four necessary conditions for deadlock to occur.
