1. A subschema expresses
a) the logical view
b) the physical view
c) the external view
d) all of the above
Discussion
2. Count function in SQL returns the number of
a) values
b) distinct values
c) groups
d) columns
Discussion
3. Which one of the following statements is false?
a) The data dictionary is normally maintained by the database administrator
b) Data elements in the database can be modified by changing the data dictionary
c) The data dictionary contains the name and description of each data element
d) The data dictionary is a tool used exclusively by the database administrator
Discussion
4. A DBMS query language is designed to
a) support end users who use English-like commands
b) support in the development of complex applications software
c) specify the structure of a database
d) all of the above
Discussion
5. An advantage of the database management approach is
a) data is dependent on programs
b) data redundancy increases
c) data is integrated and can be accessed by multiple programs
d) none of the above
Discussion
6. Transaction processing is associated with everything below except
a) producing detail, summary, or exception reports
b) recording a business activity
c) confirming an action or triggering a response
d) maintaining data
Discussion
7. The method of access which uses key transformation is known as
a) direct
b) hash
c) random
d) sequential
Discussion
8. It is possible to define a schema completely using
a) VDL and DDL
b) DDL and DML
c) SDL and DDL
d) VDL and DML
Discussion
9. Data independence means
a) data is defined separately and not included in programs
b) programs are not dependent on the physical attributes of data
c) programs are not dependent on the logical attributes of data
d) both (B) and (C)
Discussion
10. The statement in SQL which allows to change the definition of a table is
a) Alter
b) Update
c) Create
d) select
Discussion