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Relational Database Fundamentals Quizzes Solved 100% Correct
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Relational Database FundamentalsQuizzes Solved 100% Correct
What can be said about the two relations shown in the exhibit? - ANSWER They
are both strong entities.
In a data model, details about the kinds of operations that are permitted on the data are
described by which type of information? - ANSWER Manipulative information
What is a parent key? - ANSWER The primary key referenced by a foreign key
Every column in a relation must have what? - ANSWER A defined domain
In a relational database, rows, columns and tuples are stored in: - ANSWER a relation.
What is a thin client? - ANSWER A client that relies on the server to perform the bulk
of the data-processing operations
The number of tuples in a relation determines which characteristic of the relation? -
ANSWER Its cardinality
What is a fat client? - ANSWER A client that performs the bulk of the data-
processing operations
What does a set of permissible values for one or more attributes in a relational
database referred to as? - ANSWER Domain
, The number of attributes in a relation determines which characteristic of the relation? -
ANSWER Its degree
What is an advantage of three-tier client-server systems over two-tier client-server
systems? - ANSWER The centralized application logic makes maintaining the
application easier.
The process of organizing and refining relations within a relational database is known
as what? - ANSWER Normalization
According to E.F. Codd, which three pieces of information are needed to retrieve a
value? - ANSWER The name of the table, the name of the column, and the primary key
of the row
Which of the following is true of columns in a relation? - ANSWER Columns must have
a name that is unique within its relation.
In terms of database relationships, what determines the degree of a relationship? -
ANSWER The number of entities involved in the relationship
What is a column in a table that is the primary key of another table known as? -
ANSWER Foreign key
Which of the following is an example of an entity constraint? - ANSWER A rule stating
that no part of the primary key can be null
Which of the following processes may reduce the duplication of data items within
a database, yet increase the number of tables within it? - ANSWER Normalizing
How are the tables that make up the data dictionary updated? - ANSWER They are
updated automatically by the DBMS as the system is used.
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