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DBMS - Database Management Systems: Qs & As 100%
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DBMS - Database Management Systems: Qs & As 100%
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DBMS - Database Management Systems: Qs & As 100%Database Right Ans - collection of related data and data is a collection of
facts and figures that can be processed to produce information.
Database Management System or DBMS Right Ans - refers to the
technology of storing and retrieving users' data with utmost efficiency along
with appropriate security measures
database management system Right Ans - stores data in such a way that it
becomes easier to retrieve, manipulate, and produce information.
Administrators Right Ans - maintain the DBMS and are responsible for
administrating the database. They are responsible to look after its usage and
by whom it should be used. They create access profiles for users and apply
limitations to maintain isolation and force security.
Designers Right Ans - group of people who actually work on the designing
part of the database. They keep a close watch on what data should be kept and
in what format. They identify and design the whole set of entities, relations,
constraints, and views.
End Users Right Ans - those who actually reap the benefits of having a
DBMS.
Data models Right Ans - define how the logical structure of a database is
modeled. Fundamental entities to introduce abstraction in a DBMS. Define
how data is connected to each other and how they are processed and stored
inside the system.
Entity-Relationship (ER) Model Right Ans - based on the notion of real-
world entities and relationships among them.
Entity Right Ans - An entity in an ER Model is a real-world entity having
properties called attributes.
domain Right Ans - Every attribute is defined by its set of values called
Relationship Right Ans - The logical association among entities
, A database schema Right Ans - skeleton structure that represents the
logical view of the entire database.
database instance Right Ans - state of operational database with data at
any given time.
Mapping cardinalities Right Ans - define the number of association
between two entities.
relations Right Ans - Data is stored in tables
database schema Right Ans - defines its entities and the relationship among
them
Physical Database Schema Right Ans - This schema pertains to the actual
storage of data and its form of storage like files, indices, etc. It defines how the
Logical Database Schema Right Ans - This schema defines all the logical
constraints that need to be applied on the data stored. It defines tables, views,
and integrity constraints.
database instance Right Ans - state of operational database with data at
any given time. It contains a snapshot of the database
Conceptual Data Model Right Ans - set of concepts that describe the
structure of the database and the associated retrieval and update transactions
on the database
Entity-Relationship Data Model Right Ans - high-level conceptual data
model developed by Peter Chen (1976) to facilitate database design
ENTITIES Right Ans - (persons, places, things etc.) which the organization
has to deal with - objects/events
ATTRIBUTES Right Ans - the items of information which characterize and
describe these entities.
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