Database Management Systems
QNo. 01: What
is Data?
Answer: Collection
of raw facts and figures about any object or event is called data.
QNo. 02: What
are the types of data?
Answer: There are various types of data
example text data, video data, picture data, voice data and numerical data.
QNo. 03: How will you define Information?
Answer: Collection of useful data about any
event or object is called information.
Or when data is
processed in computer the output is information.
QNo. 04: what is database?
Answer: An organized collection of
information or data is called Database. Database arrange data in such a way
that any piece of information can be retrieved easily.
QNo. 05: Define the uses of databases?
Answer: Databases are used to store data of
different events, objects, entities that belong to different organizations.
Like Schools, hospitals, Military and business firms.
QNo. 06: How many types of Database model are
there? And what are these?
Answer: There are four types of Database
model, namely, 1. Hierarchical Model 2. Network Model 3. Relational Model 4. Object Oriented Model. The Relational
model is most popular.
QNo. 07: What are the elements of Database?
Answer: A table is the basic element of
database, it is composed of Rows called records and columns called fields.
Records and Fields together make the table.
QNo. 08: What is function of Record and field in
a table?
Answer: Each record defines information about
one entity and gives complete details about it. On the other hand each field
defines information of a certain type of for all records.
QNo. 09: Draw a table of students that which
show roll no, name , address, age and class of five student? And give titles to
the table?
Answer: Students
|
roll no
|
name
|
address
|
age
|
class
|
|
023
|
Hassan Ali
|
Jacobabad
|
15
|
VIII
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
QNo.10: What
is Database Management System?
Answer: A Database Management System is the
collection of computer programs which is used to create, modify, delete, add,
maintain and control the access to database.
إرسال تعليق