DBMS Multiple choice Questions and Answers-DBMS Basics

41.	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.

Answer: (b).Data elements in the database can be modified by changing the data dictionary.

42.	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

Answer: (c).data is integrated and can be accessed by multiple programs.

43.	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

Answer: (b).DDL and DML

44.	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.

Answer: (d).both b and c.

Answer: (d).Both a and b

46.	It is better to use files than a DBMS when there are
a.	Stringent real-time requirements.
b.	Multiple users wish to access the data.
c.	Complex relationships among data.
d.	All of the above

Answer: (b).Multiple users wish to access the data.

47.	The users who use easy-to-use menu are called
a.	Sophisticated end users
b.	Naive users
c.	Stand-alone users
d.	Casual end users

Answer: (b).Naive users

48.	Which database level is closest to the users?
a.	External
b.	Internal
c.	Physical
d.	Conceptual

Answer: (a).External

49.	Which are the two ways in which entities can participate in a relationship?
a.	Passive and active
b.	Total and partial
c.	Simple and Complex
d.	All of the above

Answer: (b).Total and partial

50.	Which of the following database object does not physically exist?
a.	base table
b.	index
c.	view
d.	none of the above

Answer: (c).view