Podcast
Questions and Answers
What is the primary key?
What is the primary key?
- Attribute property of an entity
- Simple key
- Candidate key (correct)
- Foreign key
Which constraint requires that critical information isn't duplicated?
Which constraint requires that critical information isn't duplicated?
- Primary key
- Candidate key (correct)
- Simple key
- Foreign key
What is a composite key made up of?
What is a composite key made up of?
- All attributes with unique values
- An attribute used to reference a primary key
- Two or more attributes (correct)
- Only one attribute
Which type of key is used to reference a primary key in another table?
Which type of key is used to reference a primary key in another table?
In the context of relational databases, what does 'degree' refer to?
In the context of relational databases, what does 'degree' refer to?
What does 'cardinality' signify in relational databases?
What does 'cardinality' signify in relational databases?
What does the hierarchical data model prevent entities from doing?
What does the hierarchical data model prevent entities from doing?
In the network data model, what is a key feature regarding child entities?
In the network data model, what is a key feature regarding child entities?
How are entities described in data modeling?
How are entities described in data modeling?
What do data model constraints primarily help to ensure?
What do data model constraints primarily help to ensure?
Which type of relationship in data models describes an association among two entities?
Which type of relationship in data models describes an association among two entities?
Why are constraints considered important in database design?
Why are constraints considered important in database design?
Which type of attribute can be divided into further parts?
Which type of attribute can be divided into further parts?
What does a multivalued attribute represent within the ERD symbols?
What does a multivalued attribute represent within the ERD symbols?
What is the main characteristic of a single-valued attribute?
What is the main characteristic of a single-valued attribute?
In an Entity-Relationship Diagram (ERD), what do 'Null Values' represent?
In an Entity-Relationship Diagram (ERD), what do 'Null Values' represent?
Which symbol in an ERD represents a multivalued attribute?
Which symbol in an ERD represents a multivalued attribute?
What defines the Degree of Relationship in an ERD?
What defines the Degree of Relationship in an ERD?
