Introduction to Parallel Programming Chapter 6 Quiz
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Questions and Answers

What is the n-body problem?

  • Solving complex mathematical equations
  • Finding the positions and velocities of a collection of interacting particles over a period of time (correct)
  • Determining the distance between planets and stars
  • Simulating the behavior of animals in a group
  • What is an n-body solver?

  • An algorithm for analyzing chemical reactions
  • A device for calculating planetary orbits
  • A tool used to measure the force of gravity between objects
  • A program that finds the solution to an n-body problem by simulating the behavior of the particles (correct)
  • How is the motion of planets simulated in n-body solvers?

  • By determining the positions and velocities using Newton’s second law of motion and law of universal gravitation (correct)
  • By randomly assigning positions and velocities to the planets
  • By using historical data from previous planet observations
  • By measuring the distance between planets and stars
  • What does serial pseudo-code refer to in the context of n-body solvers?

    <p>A sequential algorithm written in a programming language to solve the n-body problem</p> Signup and view all the answers

    What is the reduced algorithm for computing N-Body forces?

    <p>An optimized method for calculating forces between interacting particles in an n-body problem</p> Signup and view all the answers

    What is the primary goal of an n-body solver program?

    <p>To simulate the behavior of interacting particles</p> Signup and view all the answers

    What problem does an n-body solver program help solve?

    <p>The n-body problem</p> Signup and view all the answers

    What does a reduced algorithm for computing N-Body forces aim to achieve?

    <p>To optimize the computation of forces for n-body solvers</p> Signup and view all the answers

    What is the main focus of Newton’s second law of motion and law of universal gravitation in the context of n-body solvers?

    <p>Computing the forces and motion of interacting particles</p> Signup and view all the answers

    What is the purpose of serial pseudo-code in the context of n-body solvers?

    <p>To outline the sequential execution of the n-body solver program</p> Signup and view all the answers

    What is the potential consequence of updates to the elements of the forces array in the context of parallel computing?

    <p>Introduction of race conditions</p> Signup and view all the answers

    In the context of parallel computing, what is the purpose of using one lock for each particle?

    <p>Preventing race conditions</p> Signup and view all the answers

    What is the effect of forking and joining of threads with the same team in parallel computing?

    <p>Reduced thread coordination</p> Signup and view all the answers

    What problem arises from the repeated forking and joining of threads in parallel computing?

    <p>Increased thread conflicts</p> Signup and view all the answers

    What is the primary challenge associated with access to the forces array in parallel computing?

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

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