CS Professional · Artificial Intelligence, Data Analytics and Cyber Security - Laws and Practice · Database Management
A company wants a data model in which records are organised as a tree, each child record having exactly one parent, and access follows fixed parent-to-child paths. Which data model is this?
It is the hierarchical model. Records form a tree with one-to-many parent-child links, and each child has exactly one parent. The network model differs because a record can have several parents, while the relational model uses tables linked by keys.
- ARelational model
- BNetwork model
- CHierarchical modelCorrect
- DObject-oriented model
Explanation
The hierarchical model arranges records in a tree with a one-to-many parent-child relationship where each child has only one parent. The network model allows a child to have multiple parents through graph-like links. The relational model uses tables and keys.
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