Operating System Concepts 10th Edition
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Questions and Answers

What is the primary issue with the implementation of counter++ and counter-- in the given code?

  • They use busy waiting
  • They are not atomic operations (correct)
  • They are not thread-safe
  • They are not using mutual exclusion
  • In the given producer-consumer problem, what is the role of the 'counter' variable?

  • It acts as a mutex to protect the buffer
  • It is used to synchronize the producer and consumer
  • It keeps track of the number of buffers filled (correct)
  • It keeps track of the number of buffers empty
  • What is the result of the execution interleaving shown in the text?

  • counter is undefined (correct)
  • counter = 4
  • counter = 6
  • counter = 5
  • What is the purpose of the 'while (counter == BUFFER_SIZE)' loop in the producer code?

    <p>To wait until the buffer is full</p> Signup and view all the answers

    In the given code, what is the role of the 'buffer' variable?

    <p>It acts as a shared memory region</p> Signup and view all the answers

    What is the problem that the producer-consumer code is trying to solve?

    <p>Coordination of producer and consumer processes</p> Signup and view all the answers

    What is the primary concern in the shared memory approach to interprocess communication?

    <p>Providing a mechanism for user processes to synchronize their actions</p> Signup and view all the answers

    What is the characteristic of the unbounded-buffer approach in the producer-consumer problem?

    <p>The producer process never waits</p> Signup and view all the answers

    What is the main difference between the bounded-buffer and unbounded-buffer approaches in the producer-consumer problem?

    <p>The buffer size</p> Signup and view all the answers

    Which of the following is a paradigm for cooperating processes in the producer-consumer problem?

    <p>Interprocess communication</p> Signup and view all the answers

    What is the primary advantage of the shared memory approach to interprocess communication?

    <p>Improved communication speed</p> Signup and view all the answers

    What is the main issue in implementing a bounded-buffer solution to the producer-consumer problem?

    <p>Synchronizing the producer and consumer processes</p> Signup and view all the answers

    What is the main drawback of the provided code?

    <p>It can only use BUFFER_SIZE-1 elements.</p> Signup and view all the answers

    What approach can be used to fill all the buffers?

    <p>Using an integer counter to track the number of full buffers.</p> Signup and view all the answers

    What is the purpose of the 'in' variable in the producer process?

    <p>To keep track of the next free buffer index.</p> Signup and view all the answers

    Why does the producer process use busy waiting?

    <p>To wait for the buffer to become available.</p> Signup and view all the answers

    What is the purpose of the 'out' variable in the consumer process?

    <p>To keep track of the next consumed buffer index.</p> Signup and view all the answers

    What type of inter-process communication is used in the code?

    <p>Shared memory.</p> Signup and view all the answers

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