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Which of the following is a data access framework?

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Which of the following is a data access framework?

(a) Merge

(b) Lucene.NET

(c) MetaModel

(d) None of the mentioned

This question was addressed to me by my college director while I was bunking the class.

I need to ask this question from Hadoop Libraries in portion Oozie, Orchestration, Hadoop Libraries and Utilities and Miscellaneous Hadoop Applications of Hadoop

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The correct answer is (c) MetaModel

To explain: MetaModel provides a common interface for exploration and querying of different types of datastores.

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