1. CSEN 5314
Quiz 1

2. 1. A data model is a collection of concepts that can be used to describe the ___________ of a database.
a. extension b. structure c. state d. instance
2. __________ schema describes physical storage structures and access paths.
a. Internal b. Conceptual c. External d. DBMS
3. ______ data independence is the capacity to change the internal schema without having to change the conceptual schema.
a. Logical b. Physical c. Static d. Dynamic
4. A _____________ is a unit of work that includes one or more reads or updates of database records, and it should be processed reliably without interference from other users and without loss of data due to failures.
a. Schema b. Transaction c. Data model d. Update query

3. 1. A data model is a collection of concepts that can be used to describe the ___________ of a database.
a. extension b. structure c. state d. instance
2. __________ schema describes physical storage structures and access paths.
a. Internal b. Conceptual c. External d. DBMS
3. ______ data independence is the capacity to change the internal schema without having to change the conceptual schema.
a. Logical b. Physical c. Static d. Dynamic
4. A _____________ is a unit of work that includes one or more reads or updates of database records, and it should be processed reliably without interference from other users and without loss of data due to failures.
a. Schema b. Transaction c. Data model d. Update query