Question

In the hierarchical data model, the mapping from parent to child is:

1) 1:1 (one-to-one)
2) N:N (many-to-many)
3) N:1 (many-to-one)
4) 1:N (one-to-many)

Answer 1

In the hierarchical data model, the parent to child mapping is 1:N (one-to-many), where a single parent can have multiple children, reflecting a tree-like structure used in different systems such as taxonomy and kinship charts.

Step-by-step explanation:

In the hierarchical data model, the mapping from parent to child is 1:N (one-to-many). This means that one parent node can have multiple child nodes, but each child node has only one parent node. This structure is similar to a tree where each branch can have several leaves. The hierarchical model is used in various systems, such as the taxonomic classification system, where each level has a more specific classification from the general to the specific, and in kinship charts where family trees are organized by genealogical relationships.