Relational Model Quiz

What does the Relational Model represent in databases?

• Data storage in files

• Data processing in tables

• Data processing in files

• Data storage in tables

What is the main use of the Relational Model?

• Data storage and processing

• Data visualization

• Data analysis

• Data transmission

What is a relation in the Relational Model?

• A tree structure

• A list with items

• A graph with nodes and edges

• A table with rows and columns

What are attributes in the Relational Model?

• Properties that define a relation

• Functions that define a relation

• Variables that define a relation

• Methods that define a relation

What is a tuple in the Relational Model?

• Each cell in the relation

• Each key in the relation

• Each row in the relation

• Each column in the relation

What is the degree of a relation in the Relational Model?

• The number of keys

• The number of tables

• The number of tuples

• The number of attributes

What is the cardinality of a relation in the Relational Model?

• The number of tuples

• The number of attributes

• The number of tables

• The number of keys

What is a Super Key in the Relational Model?

• A key with duplicate values

• A key with NULL values

• A single attribute to identify rows

• A combination of all possible attributes to uniquely identify rows

What is a Candidate Key in the Relational Model?

• A key with duplicate values

• A key with NULL values

• A key with all possible attributes

• A minimal super key with no redundant attribute

What is a Primary Key in the Relational Model?

• The minimal set of attributes to uniquely identify any row

• A key with all attributes

• A key with NULL values

• A key with duplicate values