Introduction to Parallel Computing
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Questions and Answers

What is the main advantage of the Distributed Memory model over the Shared Memory model?

  • It is less expensive to design and produce distributed memory machines
  • Increasing the number of processors also increases the size of the memory proportionately (correct)
  • Processor communication is faster in the Distributed Memory model
  • Data races and deadlocks can be avoided during programming

    • Which of the following is a disadvantage of the Distributed Memory model?

  • Distributed memory machines are more complex and expensive to design and produce
  • Each processor can rapidly access its own memory without affecting the other processors' memory
  • Increasing the number of processors also increases the size of the memory proportionately
  • The programmer is responsible for establishing communication between processors (correct)

    • What is the main disadvantage of the Shared Memory model?

  • It is expensive to design and produce shared memory machines
  • Shared memory architectures are prone to data races and deadlocks
  • Adding more CPUs can increase traffic on the shared memory path
  • All of the above (correct)

    • In the Distributed Memory model, how do processors access remote data?

    <p>Processors must communicate with remote processors to access remote data</p> Signup and view all the answers

    What is the purpose of the communication network in the Distributed Memory model?

    <p>To enable communication between processors for accessing remote data</p> Signup and view all the answers

    Which of the following is a key advantage of the Shared Memory model over the Distributed Memory model?

    <p>Shared memory avoids the need for programmer-managed communication</p> Signup and view all the answers

    What is the main advantage of using a message passing system over a shared memory system in parallel computing?

    <p>It allows for more efficient communication between processors by only sending messages to the processors that need the information.</p> Signup and view all the answers

    What is the main challenge that arises as the number of processors in a parallel system increases?

    <p>The overall performance benefit of adding more processors becomes too small to justify the additional expense.</p> Signup and view all the answers

    What is the purpose of the 'message passing system' described in the text?

    <p>To allow processors to communicate by sending messages to each other instead of using shared memory.</p> Signup and view all the answers

    What is the benefit of using a 'message passing system' over a 'shared memory' approach in parallel computing?

    <p>It allows for more efficient communication by only sending messages to the processors that need the information.</p> Signup and view all the answers

    What is the main reason that the performance benefit of adding more processors to a parallel system becomes too small to justify the additional expense?

    <p>The communication time between processors increases.</p> Signup and view all the answers

    How does a 'message passing system' differ from a 'shared memory' approach in parallel computing?

    <p>In a message passing system, processors send messages to each other, while in a shared memory system they access a common memory pool.</p> Signup and view all the answers

    What is the main goal of parallel computing?

    <p>To use multiple processing elements simultaneously to solve a problem</p> Signup and view all the answers

    How does a serial computing system differ from a parallel computing system?

    <p>Parallel systems have just one processor</p> Signup and view all the answers

    What is the advantage of parallel computing over serial computing systems?

    <p>Parallel systems can have many processors working simultaneously</p> Signup and view all the answers

    How does the central processor in a parallel computing system assign work to different processors?

    <p>By assigning each processor different parts of the problem</p> Signup and view all the answers

    What role does communication play in parallel computing?

    <p>It allows processors to report results back to the central processor</p> Signup and view all the answers

    Why is parallel computing emerging as a prevalent computing paradigm?

    <p>Because of the semiconductor industry's shift to multi-core processors</p> Signup and view all the answers

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