Which of the following is not a recognized database model used by a database…
2018
Which of the following is not a recognized database model used by a database management system (DBMS)?
Answer: B. Sequential — ConceptA database model defines the logical structure used to represent data and the relationships among data. A file-organization or access method instead…
- A.
Hierarchical
- B.
Sequential
- C.
Object-Oriented
- D.
Relational
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Show answer & explanation
Correct answer: B
Concept
A database model defines the logical structure used to represent data and the relationships among data. A file-organization or access method instead describes how records are physically arranged or traversed; it is not itself a database model.
Application
Classify every offered term by that distinction. Hierarchical, Object-Oriented, and Relational each name a database model. Sequential describes an ordering or access method for records in a file, so it belongs to a different classification axis.
Contrast
Hierarchical: represents records in parent-child trees.
Sequential: arranges or processes file records one after another.
Object-Oriented: represents persistent objects, classes, and inheritance.
Relational: represents data in tables linked through values and keys.
Cross-check
Only “Sequential” changes the axis from a database model to file organization or record access. Therefore, the term that is not a recognized database model in this list is Sequential.