In the relational model, cardinality is the
number of tuples
number of attributes
number of tables
number of constraints
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
Cartesian product in relational algebra is
a unary operator
a binary operator
a ternary operator
not defined
Abstraction of the database can be viewed as
two levels
four levels
three levels
one level
In a table Employee Emp- code, Pan_ no are the candidate keys. If Emp_ code is taken as the primary key then Pan_ no is _________ key.
candidate key
alternate key
primary key
foreign key
A relational database developer refers to a record as
criteria
relation
tuple
attribute
