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Which of these is not a feature of Hierarchical model?

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Which of these is not a feature of Hierarchical model?

(a) Organizes the data in tree-like structure

(b) Parent node can have any number of child nodes

(c) Root node does not have any parent

(d) Child node can have any number of parent nodes

I have been asked this question in a national level competition.

This interesting question is from Organization of Records in Files in portion Storage and File Structures of Database Management

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The correct option is (d) Child node can have any number of parent nodes

For explanation: The data are traversed using several algorithms.

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