Which of these data models is an extension of relational data model?
A. Object-oriented data model
B. Object-relational data model
C. Semi structured data model
D. None of the mentioned
Answer:A
Which of these data models is an extension of relational data model?
A. Object-oriented data model B. Object-relational data model C. Semi structured data model D. None of the mentioned
Explanation: All the data are stored in form of memory in the disk.