Deadlock in Operating Systems
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Questions and Answers

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?

  • Three
  • Four (correct)
  • Five
  • Six
  • 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?

    <p>Multitasking</p> Signup and view all the answers

    What is the main problem that deadlock causes in operating systems?

    <p>Blocking of a set of processes</p> Signup and view all the answers

    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.

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