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What is the main limitation of Hierarchical Databases?

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What is the main limitation of Hierarchical Databases? (a) Limited capacity (unable to hold much data) (b) Limited flexibility in accessing data (c) Overhead associated with maintaining indexes (d) The performance of the database is poor This question was addressed to me in an online interview. The question is from Ordered Indexing and Hashing topic in portion Indexing and Hashing of Database Management

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Correct choice is (b) Limited flexibility in accessing data Easy explanation - In this, the data items are placed in a tree like hierarchical structure.

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