A key of type is generated which is used later to join ngrams with their heads and tails in the reducer phase.

Mr. Dubey • 52.26K Points
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Q. A key of type                         is generated which is used later to join ngrams with their heads and tails in the reducer phase.

(A) gramkey

(B) primary

(D) none of the mentioned

Correct : Option (A)

Explanation:

 the gramkey is a composite key made up of a string n-gram fragment as the primary key and a secondary key used for grouping and sorting in the reduce phase.

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Q. A key of type is generated which is used later to join ngrams with their heads and tails in the reducer phase.

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