Question: Write high level MapReduce pseudocode to compute the document frequencies (df) of all words in a collection. What is the format of the {key,value) pairs

Write high level MapReduce pseudocode to compute the document frequencies (df) of all words in a collection. What is the format of the {key,value) pairs output by the mappers? For example, if collection contains documents: D1: UCR school D2: UCR play UCR the output should be UCR, 2 school, 1 play, 1

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