Question

Which of the following is true regarding the hierarchical database model?

1) It was first developed by Peter Chen.
2) Data and methods are stored together in the database.
3) Each node may have many parents.
4) Records are connected using physical address pointers.

Answer 1

In the hierarchical database model, records are connected using physical address pointers, forming a tree-like structure with a single parent for each child node.

Step-by-step explanation:

The hierarchical database model is an early method of organizing and storing data. One of the statements provided is true regarding the hierarchical database model: Records are connected using physical address pointers. This means that each record is linked to others via addresses, forming a tree-like structure where each child record has only one parent, thus invalidating the option that suggests each node may have many parents. Peter Chen, mentioned in one of the options, actually developed the Entity-Relationship model, not the hierarchical model. The assertion that data and methods are stored together describes the object-oriented database model, not the hierarchical model.