Research-Aptitude
August 21, 2024ER-Model
| Question 67 |
A Network Schema
| restricts to one to many relationship | |
| permits many to many relationship | |
| stores Data in a Database | |
| stores Data in a Relation |
Question 67 Explanation:
→ The network model expands upon the hierarchical structure, allowing many-to-many relationships in a tree-like structure that allows multiple parents. It was most popular before being replaced by the relational model, and is defined by the CODASYL specification.
→ The network model organizes data using two fundamental concepts, called records and sets.
→ Records contain fields (which may be organized hierarchically, as in the programming language COBOL).
→ Sets (not to be confused with mathematical sets) define one-to-many relationships between records: one owner, many members.
→ A record may be an owner in any number of sets, and a member in any number of sets.
→ The network model organizes data using two fundamental concepts, called records and sets.
→ Records contain fields (which may be organized hierarchically, as in the programming language COBOL).
→ Sets (not to be confused with mathematical sets) define one-to-many relationships between records: one owner, many members.
→ A record may be an owner in any number of sets, and a member in any number of sets.
Correct Answer: B
Question 67 Explanation:
→ The network model expands upon the hierarchical structure, allowing many-to-many relationships in a tree-like structure that allows multiple parents. It was most popular before being replaced by the relational model, and is defined by the CODASYL specification.
→ The network model organizes data using two fundamental concepts, called records and sets.
→ Records contain fields (which may be organized hierarchically, as in the programming language COBOL).
→ Sets (not to be confused with mathematical sets) define one-to-many relationships between records: one owner, many members.
→ A record may be an owner in any number of sets, and a member in any number of sets.
→ The network model organizes data using two fundamental concepts, called records and sets.
→ Records contain fields (which may be organized hierarchically, as in the programming language COBOL).
→ Sets (not to be confused with mathematical sets) define one-to-many relationships between records: one owner, many members.
→ A record may be an owner in any number of sets, and a member in any number of sets.
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