Concurrency and Synchronization Methods
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What is the purpose of the 'Send' primitive in message passing?

  • To wait for a message to arrive
  • To receive a message from a source process
  • To generate something to put in the buffer
  • To send a message to a destination process (correct)
  • Which of the following accurately describes the 'Receive' primitive in message passing?

  • Sends a message to a destination process
  • Receives a message from a source process (correct)
  • Generates an item to put in the buffer
  • Waits for an empty buffer slot to arrive
  • What is the role of 'producer' in the Producer Consumer problem using message passing?

  • Receives messages from consumer
  • Waits for an empty buffer slot to arrive
  • Sends messages to consumer
  • Generates items to put in the buffer (correct)
  • In the context of message passing, what does 'consumer' do?

    <p>Receives messages from producer</p> Signup and view all the answers

    What happens when the 'Receive' primitive is executed in message passing?

    <p>A message is received from a source process</p> Signup and view all the answers

    What is the purpose of building a message in the context of message passing?

    <p>To construct a message to send</p> Signup and view all the answers

    What happens if the value of a semaphore is 0?

    <p>The process is put to sleep without completing the down operation</p> Signup and view all the answers

    Which of the following statements about semaphore operations is correct?

    <p>No other process can access the semaphore until a semaphore operation is completed or blocked</p> Signup and view all the answers

    What does the 'up' operation do to a semaphore?

    <p>Increments the value of the semaphore</p> Signup and view all the answers

    What happens if one or more processes were sleeping on a semaphore during an 'up' operation?

    <p>A random process is chosen to complete its down operation</p> Signup and view all the answers

    What is guaranteed about a process doing an 'up' operation on a semaphore?

    <p>It completes without blocking any process</p> Signup and view all the answers

    What is the purpose of setting the shared lock variable to 1 before entering the critical section?

    <p>To prevent other processes from entering the critical section</p> Signup and view all the answers

    In the scenario described, what issue arises due to the context switch when process P0 is setting the lock variable to 1?

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

    What problem is addressed by using the 'turn' variable in the strict alteration algorithm?

    <p>Priority inversion</p> Signup and view all the answers

    What characteristic of busy waiting is highlighted in the given text?

    <p>Wasteful CPU usage</p> Signup and view all the answers

    In the shared lock variable algorithm, what prevents two processes from simultaneously accessing the critical section?

    <p>The 'lock' variable</p> Signup and view all the answers

    Why does process P1 wait in a loop in the strict alteration algorithm?

    <p>To wait for turn variable to change</p> Signup and view all the answers

    What is the primary disadvantage of taking turns when one process is much slower than the other?

    <p>Deadlock occurrence</p> Signup and view all the answers

    In the TSL (Test and Set Lock) Instruction, what is the purpose of the CMP REGISTER,#0 instruction?

    <p>To check if the lock variable is 0</p> Signup and view all the answers

    What action does the process take in the leave_region step of the TSL (Test and Set Lock) Instruction?

    <p>Store 0 in lock variable</p> Signup and view all the answers

    In the Exchange Instruction Algorithm, what happens after moving REGISTER,#1 in the enter_region step?

    <p>Swapping content of REGISTER and LOCK</p> Signup and view all the answers

    What is a key difference between the TSL (Test and Set Lock) Instruction and Exchange Instruction Algorithm?

    <p>The mechanism for entering the critical region</p> Signup and view all the answers

    Why is taking turns not a good idea when one process is much slower than another?

    <p>It can cause a race condition</p> Signup and view all the answers

    Which synchronization primitive is described as a collection of procedures, variables, and data structures grouped together in a special module or package?

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

    In the Producer Consumer problem using Semaphores, what does the 'full' semaphore represent?

    <p>Items produced by the producer</p> Signup and view all the answers

    What is the purpose of the 'empty' semaphore in the Producer Consumer problem with Semaphores?

    <p>To track available slots in the buffer</p> Signup and view all the answers

    What role does the 'mutex' semaphore play in the Producer Consumer problem using Semaphores?

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

    Why does a process get suspended when calling a procedure within a monitor if another process is already active?

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

    What property of a monitor ensures that only one process can be active within it at any instant?

    <p>Mutual exclusion</p> Signup and view all the answers

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