What does an Entity Set consist of in the ER Model?

A set of all entities of a particular Entity Type.

Which attribute in an ER diagram uniquely identifies each entity?

Key Attribute.

True or False: A composite attribute is made up of multiple attributes.

True.

Riddle: I can contain many values for a single entity, often represented in a double oval. What am I?

Multivalued Attribute.

The number of different entity sets participating in a relationship set is known as ______.

Degree of a relationship set.

Which type of relationship exists when only one entity set is involved?

Unary Relationship.

In an ER diagram, how is a derived attribute represented?

By a dashed oval.

What type of relationship allows entities from multiple entity sets to participate more than once?

Many to many Relationship.

Fill in the blanks: A ______ is an entity type that does not have a key attribute.

Weak Entity Type.

Which key is defined as a minimal super key?

Candidate Key.

True or False: A primary key can contain NULL values.

False. A primary key cannot be NULL.

What type of key is defined as a key other than the primary key?

Alternate Key.

Riddle: I connect two tables, acting as a primary key in one and a foreign key in another. What am I?

Foreign Key.

Cardinality of a relationship where one entity can relate to multiple entities is called ______.

Many to one.

In an ER diagram, what shape represents a relationship type?

A diamond.

Fill in the blanks: The ______ defines how many instances of one entity can be associated with instances of another entity.

Cardinality.

What is the primary function of a Foreign Key in a database?

To create a link between two tables.

True or False: A composite key can consist of two or more attributes.

True.

Riddle: I help to identify a single record in a table and must be unique; I am often the main key. What am I?

Primary Key.

Which type of attribute can be derived from other attributes of the entity type?

Derived Attribute.

What is the representation of a weak entity type in an ER diagram?

A double rectangle.

Fill in the blanks: Each student must enroll in a course, indicating ______ participation.

Total Participation.