Concurrency Control Principles

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 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. (B)</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 (A)</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. (C)</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 (B)</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 (D)</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 (B)</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 (B)</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 (D)</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 (D)</p> Signup and view all the answers

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

<p>Monitors (B)</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 (D)</p> Signup and view all the answers

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

<p>Mutex lock (B)</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 (C)</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 (B)</p> Signup and view all the answers

Flashcards are hidden until you start studying

More Like This

Concurrency Control in Database Systems
10 questions
Concurrency Control Principles
17 questions
Concurrency Control Principles
17 questions
Use Quizgecko on...
Browser
Browser