Which of following is never used as a data model?
a. Hierarchical data model
b. None of the others
c. Graph-based data model
d. Tree-based data model
e. Relational data model
Answer: B
Which of following is never used as a data model?
a. Hierarchical data model
b. None of the others
c. Graph-based data model
d. Tree-based data model
e. Relational data model
Answer: B