problem 1: Why would you select a database system rather than simply storing data in operating system files? When would it make sense not to use the database system?

problem 2: What do you mean by the logical data independence and why is it significant?

problem 3: Describe the difference between logical and physical data independence.

problem 4: Describe the difference between external, internal and conceptual schemas. How are these distinct schema layers associated to the concepts of the logical and physical data independence?

problem 5: describe the duties of a DBA?

problem 6: Differentiate between the term logical and physical database design.

problem 7: describe and define the key properties of the database system. Give an organizational illustration of the advantages of each property.