10. Define data model.
11. What are the components of storage manager?
12. What is the purpose of storage manager?
Answers
Answer:
10)A data model (or datamodel) is an abstract model that organizes elements of data and standardizes how they relate to one another and to the properties of real-world entities. ... So the "data model" of a banking application may be defined using the entity-relationship "data model".
11)The storage manager components include:•Authorization and integrity manager:Tests the satisfaction of integrity con-straints and check the authority of the users to access data. Transaction manager:Ensures that the database remains in a consistent state evenafter system failures and crashes.
12)manager is responsible for storing, retrieving and updating the data in the database, anddoes it by translating the DML statements into low-level file-system commands.