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国外MPI教材

<div id="sa0b45_2" style="color: rgb(0, 51, 204);display: none;"><div id="taf45_5" class="block" style="display:block">Incorrect.

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<div id="sa1b45_2" style="color: rgb(0, 51, 204);display: none;"><div id="taf45_137" class="block" style="display:block">Correct!

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  <div id="nodeDecoration"><p id="nodeTitle">Question 5</p></div>
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<span class="iDeviceTitle">Question 5</span><br/>
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<div id="taquestion46_2" class="block" style="display:block"><p>

Using the Sample Program #1 given in this chapter, please answer the following:

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If the process with rank=0 prints out the value of data[1] right before it calls MPI_Finalize, what will the value be? 

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<tr><td><input type="radio" name="option46_2" id="i46_5" onclick="getFeedback(0,3,'46_2','multi')"/></td><td>
<div id="taans46_5" class="block" style="display:block">0.0

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<tr><td><input type="radio" name="option46_2" id="i46_140" onclick="getFeedback(1,3,'46_2','multi')"/></td><td>
<div id="taans46_140" class="block" style="display:block">1.0

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<tr><td><input type="radio" name="option46_2" id="i46_143" onclick="getFeedback(2,3,'46_2','multi')"/></td><td>
<div id="taans46_143" class="block" style="display:block">2.0

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<div id="sa0b46_2" style="color: rgb(0, 51, 204);display: none;"><div id="taf46_5" class="block" style="display:block"><b><span class="success">Correct!</span></b><br />

The data array is never initialized or sent any data on rank

0. Since MPI is distributed memory, each MPI process has its own memory

space.

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<div id="sa1b46_2" style="color: rgb(0, 51, 204);display: none;"><div id="taf46_140" class="block" style="display:block"><b><span class="alert">Incorrect</span></b>

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<div id="sa2b46_2" style="color: rgb(0, 51, 204);display: none;"><div id="taf46_143" class="block" style="display:block"><b><span class="alert">Incorrect</span></b>

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<div class="node">
  <div id="nodeDecoration"><p id="nodeTitle">Question 6</p></div>
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<div id="taquestion47_2" class="block" style="display:block"><p>

Using the Sample Program #1 given in this chapter, please answer the following:

</p>

<p>&nbsp;



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<p>

If the process with rank=1 prints out the value of value[1] right before it calls MPI_Finalize, what will the value be? 

</p>

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<tr><td><input type="radio" name="option47_2" id="i47_5" onclick="getFeedback(0,3,'47_2','multi')"/></td><td>
<div id="taans47_5" class="block" style="display:block">0.0

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<tr><td><input type="radio" name="option47_2" id="i47_146" onclick="getFeedback(1,3,'47_2','multi')"/></td><td>
<div id="taans47_146" class="block" style="display:block">1.0

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<tr><td><input type="radio" name="option47_2" id="i47_149" onclick="getFeedback(2,3,'47_2','multi')"/></td><td>
<div id="taans47_149" class="block" style="display:block">2.0

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<div id="sa0b47_2" style="color: rgb(0, 51, 204);display: none;"><div id="taf47_5" class="block" style="display:block">Correct!

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<div id="sa1b47_2" style="color: rgb(0, 51, 204);display: none;"><div id="taf47_146" class="block" style="display:block"><b><span class="alert">Incorrect</span></b>

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<div id="sa2b47_2" style="color: rgb(0, 51, 204);display: none;"><div id="taf47_149" class="block" style="display:block"><b><span class="alert">Incorrect</span></b>

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  <div id="nodeDecoration"><p id="nodeTitle">Question 7</p></div>
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<div id="taquestion48_2" class="block" style="display:block">MPI collective communication routines must be called by all processes in a communicator.  True or False?

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<div id="taans48_5" class="block" style="display:block">True

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<tr><td><input type="radio" name="option48_2" id="i48_152" onclick="getFeedback(1,2,'48_2','multi')"/></td><td>
<div id="taans48_152" class="block" style="display:block">False

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<div id="sa0b48_2" style="color: rgb(0, 51, 204);display: none;"><div id="taf48_5" class="block" style="display:block"><b><span class="alert">Correct!</span></b>

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<div id="sa1b48_2" style="color: rgb(0, 51, 204);display: none;"><div id="taf48_152" class="block" style="display:block"><b><span class="alert">Incorrect</span></b>

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  <div id="nodeDecoration"><p id="nodeTitle">Question 8</p></div>
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<div id="taquestion49_2" class="block" style="display:block">Which of the following statements best describes the purpose of virtual topologies?

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<div id="taans49_5" class="block" style="display:block">Virtual topologies give you additional functionality that cannot be implemented with basic point to point routines.

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<div id="taans49_155" class="block" style="display:block">Virtural topologies allow the processor topology to match the topology

of the program, making programming easier and more readable.

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<div id="sa0b49_2" style="color: rgb(0, 51, 204);display: none;"><div id="taf49_5" class="block" style="display:block"><b><span class="success">Incorrect</span></b>

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<div id="sa1b49_2" style="color: rgb(0, 51, 204);display: none;"><div id="taf49_155" class="block" style="display:block"><b><span class="success">Correct!</span></b>

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