Programming Models and MapReduce Quiz

Map and Reduce.

Counting the number of occurrences of each word in a large collection of documents.

Takes an input pair and produces a set of intermediate key/value pairs.

<p>Accepts an intermediate key and a set of values for that key, and merges together these values to form a possibly smaller set of values.</p> Signup and view all the answers

<p>Typically just zero or one output value is produced per Reduce invocation.</p> Signup and view all the answers

<p>The Map function takes an input pair and produces a set of intermediate key/value pairs, grouping together all intermediate values associated with the same intermediate key.</p> Signup and view all the answers

<p>The Reduce function accepts an intermediate key and a set of values for that key, merging them together to form a possibly smaller set of values.</p> Signup and view all the answers

<p>The MapReduce library groups together all intermediate values associated with the same intermediate key and passes them to the Reduce function.</p> Signup and view all the answers

<p>Typically, just zero or one output value is produced per Reduce invocation.</p> Signup and view all the answers

<p>The user writes the Map function to process input pairs and produce intermediate key/value pairs, and the Reduce function to merge intermediate values together to form output values.</p> Signup and view all the answers