Concurrency Control Principles
17 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the key requirement for the critical-section problem that the text mentions?

  • A bound must exist on the number of times that other processes are allowed to enter their critical sections.
  • The selection of the process that will enter the critical section next cannot be postponed indefinitely. (correct)
  • Each process must execute at a nonzero speed.
  • The relative speed of the n processes must be known.

    • Which of the following is a limitation of the interrupt-based solution described in the text?

  • It does not solve the critical-section problem.
  • It can lead to starvation, where some processes never enter their critical section.
  • It does not work if the critical section runs for an hour.
  • All of the above. (correct)

    • What is the key requirement mentioned in the text for the critical-section problem regarding the relative speed of the processes?

  • The processes must execute at a constant speed.
  • The processes must execute at the same speed.
  • The relative speed of the n processes must be known.
  • The processes must execute at a nonzero speed. (correct)

    • How does the text describe the 'Bounded Waiting' requirement for the critical-section problem?

    <p>A bound must exist on the number of times that other processes are allowed to enter their critical sections after a process has made a request.</p> Signup and view all the answers

    What is the main issue raised in the text about the interrupt-based solution if there are two CPUs?

    <p>The text does not mention any issues with the interrupt-based solution and multiple CPUs.</p> Signup and view all the answers

    What is the primary issue that can arise when processes execute concurrently and access shared data?

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

    What is the goal of mechanisms used to ensure the orderly execution of cooperating processes that access shared data?

    <p>To maintain data consistency</p> Signup and view all the answers

    Which of the following is an example of a race condition discussed in the text?

    <p>The Bounded Buffer problem with a shared counter</p> Signup and view all the answers

    Which of the following is a mechanism discussed in the text that can be used to solve the critical-section problem and maintain data consistency?

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

    What is the purpose of the critical-section problem in the context of concurrent processes?

    <p>To ensure mutual exclusion</p> Signup and view all the answers

    Which of the following is a hardware-based solution to the critical-section problem mentioned in the text?

    <p>Memory barriers</p> Signup and view all the answers

    What is the main concern addressed by the critical-section problem?

    <p>Preventing multiple processes from executing in their critical section simultaneously</p> Signup and view all the answers

    Which of the following best describes the mutual exclusion requirement in the critical-section problem?

    <p>Ensuring only one process can execute its critical section at a time</p> Signup and view all the answers

    Why is it essential for processes to follow an entry section in the critical-section problem?

    <p>To inform other processes about its intent to enter the critical section</p> Signup and view all the answers

    What issue can arise if two processes access a shared variable concurrently without synchronization?

    <p>Race condition leading to incorrect results</p> Signup and view all the answers

    In the critical-section problem, what role does the exit section play after the critical section?

    <p>Releases the control of shared resources and variables</p> Signup and view all the answers

    Which requirement must be satisfied for a solution to the critical-section problem?

    <p>Providing mutual exclusion and progress</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser