Who is responsible for managing and controlling the activities associated with the database ?
Database administrator
Programmer
Naive user
End user
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
In a relational model, relations are termed as
tuples
attributes
tables
rows
In the abstraction of a database system the external level is the
physical level
logical level
conceptual level
view level
Abstraction of the database can be viewed as
two levels
four levels
three levels
one level