Data independence means
data is defined separately and not included in programs
programs are not dependent on the physical attributes of data
programs are not dependent on the logical attributes of data
both 2 and 3
A relational database developer refers to a record as
criteria
relation
tuple
attribute
Cartesian product in relational algebra is
a unary operator
a binary operator
a ternary operator
not defined
In the abstraction of a database system the external level is the
physical level
logical level
conceptual level
view level
Which database level is closest to the users?
external
internal
physical
conceptual
SELECT
Abstraction of the database can be viewed as
two levels
four levels
three levels
one level
In a relational model, relations are termed as
tuples
attributes
tables
rows
