6.Application programs that are used to create and maintain the database and provide information to the users is called as

7.What is the model moved conceptual modeling into the practical design arena by establishing the basic building blocks: entities and relationships.

8.Which of the following key is an attribute in relation of a database that serves as the primary key of another relation in the same database?

9.What is the hierarchical database model uses the hierarchic sequence that always starts at?

10.A relation that has no partial dependencies .It is in which normal form.