Concurrency Control Principles
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What risk arises when processes P0 and P1 do not have a mechanism to prevent them from accessing the kernel variable next_available_pid simultaneously?

  • Two different processes may end up sharing the same process identifier (pid). (correct)
  • The processes may lose access to their critical sections.
  • The processes may enter an infinite loop in the critical section.
  • The processes may deadlock due to a shared resource conflict.

    • What is the main objective of a protocol designed to address the critical section problem in operating systems?

  • To increase the number of critical sections in the operating system.
  • To ensure that no process ever enters the critical section.
  • To allow multiple processes to freely access and modify shared variables.
  • To design an algorithm that guarantees mutual exclusion in critical sections. (correct)

    • What is the significance of the Mutual Exclusion requirement in the critical-section problem?

  • It ensures that only one process at a time can be executing in its critical section. (correct)
  • It removes the need for processes to ask for permission before entering critical sections.
  • It allows multiple processes to execute simultaneously in their critical sections.
  • It guarantees that all processes enter their critical sections at the same time.

    • What is a common challenge faced when designing solutions for the critical-section problem?

    <p>Overcoming race conditions on shared resources.</p> Signup and view all the answers

    Which section of a process is responsible for requesting permission to enter the critical section?

    <p>Entry section</p> Signup and view all the answers

    Why is it necessary to follow a protocol in solving the critical-section problem?

    <p>To provide a synchronized approach for accessing critical sections.</p> Signup and view all the answers

    Which of the following is NOT a requirement for a solution to the critical section problem?

    <p>All processes must execute at the same speed</p> Signup and view all the answers

    What is the potential issue with using an interrupt-based solution for mutual exclusion?

    <p>All of the above</p> Signup and view all the answers

    Which of the following statements about the progress requirement is true?

    <p>If no process is executing in its critical section and some processes wish to enter, the selection cannot be postponed indefinitely</p> Signup and view all the answers

    What does the bounded waiting requirement imply?

    <p>There is a limit on the number of times other processes can enter their critical sections after a process has requested to enter its own critical section</p> Signup and view all the answers

    Which of the following is a potential issue with mutual exclusion solutions that rely on disabling and enabling interrupts?

    <p>All of the above</p> Signup and view all the answers

    What term is used to describe the situation when concurrent access to shared data may result in data inconsistency?

    <p>Race condition</p> Signup and view all the answers

    Which of the following mechanisms is used to ensure the orderly execution of cooperating processes?

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

    What type of problem is illustrated in the text when considering the Bounded Buffer problem with a counter updated concurrently by the producer and consumer?

    <p>Critical-section problem</p> Signup and view all the answers

    Which synchronization construct allows only one thread to access a resource at a time?

    <p>Mutex lock</p> Signup and view all the answers

    In the context of concurrent processes, what issue can arise due to the incorrect ordering of execution that leads to unpredictable behavior?

    <p>Race condition</p> Signup and view all the answers

    Which of the following solutions can be utilized to prevent race conditions in a multi-threaded environment?

    <p>Implementing atomic variables</p> Signup and view all the answers

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