Quiz on Entities, Attributes, and Relationships

What is a strong entity?

• An entity that can have multiple identifiers

• An entity that exists independently with unique identifiers

• An entity that depends on another entity

• An entity that has no attributes

Which of the following is NOT a type of attribute?

• Multivalued

• Complex

• Simple

• Composite

What is the cardinality of a one-to-many relationship?

• Each entity can have many related entities

• Each entity has exactly one related entity

• One entity can have many related entities

• No entities are related

What should identifiers avoid?

• Being null

• Changing in value

• Intelligent identifiers

• All of the above

What is a unary relationship?

• A relationship between two entities

• A relationship with no entities

• A relationship between three entities

• An entity related to itself

Which of the following is a characteristic of weak entities?

• They cannot have attributes

• They depend on strong entities

• They exist independently

• They have unique identifiers

What is an associative entity?

• An entity with no attributes

• An entity that only exists in a binary relationship

• An entity that cannot be related to others

• A relationship with an attribute that is also an entity

What is the naming convention for attributes?

• Should be a complex phrase

• Should be a plural noun

• Should be a verb

• Should be a singular noun or noun phrase

Which of the following is a type of relationship?

• Quaternary

• Binary

• Pentary

• Hexary

What does the term 'cardinality' refer to in relationships?

• The strength of the relationship

• The number of attributes in an entity

• The number of entities involved in a relationship

• The type of identifiers used