1. Define the following terms.
a) Database and DBMS
c) Role of DBA
d) Relation schema in relational model.
2. Explain different types of attribute ?
3. Write a note on weak entity with example?
4. Explain data independence and its types?
5. Describe in detail about the three schema architecture ?
6. Illustrate the 1:N relation with a suitable example?
7. Draw an ER diagram for company schema with structural constraints specified using (min,max) notation ,given entity types EMPLOYEE,DEPARTMENT,PROJECT and DEPENDENT ?
8. Explain the characteristics of relations in relational data model?