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Questions and Answers
What does the design process of a database application involve?
What does the design process of a database application involve?
Which phase of the database design process involves interacting with users to understand the needs of the application?
Which phase of the database design process involves interacting with users to understand the needs of the application?
What does a high-level data model provide to the database designer?
What does a high-level data model provide to the database designer?
What is the purpose of the logical-design phase in the database design process?
What is the purpose of the logical-design phase in the database design process?
Why is it important to carry out the database design phase with care?
Why is it important to carry out the database design phase with care?
Which attribute type can be divided into subparts?
Which attribute type can be divided into subparts?
Which attribute is a composite attribute?
Which attribute is a composite attribute?
Which concept is NOT part of the E-R data model?
Which concept is NOT part of the E-R data model?
Which pitfall should be avoided in database design?
Which pitfall should be avoided in database design?
What is the purpose of the E-R model in database design?
What is the purpose of the E-R model in database design?
What is an entity in the context of the E-R model?
What is an entity in the context of the E-R model?
Which of the following best describes an entity in a database?
Which of the following best describes an entity in a database?
Which of the following is an example of an attribute for the 'Instructor' entity set?
Which of the following is an example of an attribute for the 'Instructor' entity set?
Which of the following best describes a relationship set in an E-R schema?
Which of the following best describes a relationship set in an E-R schema?
What is the purpose of a relationship instance in an E-R schema?
What is the purpose of a relationship instance in an E-R schema?
How are relationship sets represented in an E-R diagram?
How are relationship sets represented in an E-R diagram?
True or false: The domain of attribute course id might be the set of all text strings of a certain length.
True or false: The domain of attribute course id might be the set of all text strings of a certain length.
True or false: The domain of attribute semester might be strings from the set {Fall, Winter, Spring, Summer}.
True or false: The domain of attribute semester might be strings from the set {Fall, Winter, Spring, Summer}.
True or false: Simple attributes have not been divided into subparts.
True or false: Simple attributes have not been divided into subparts.
True or false: Composite attributes are used in the E-R model.
True or false: Composite attributes are used in the E-R model.
True or false: Multivalued attributes in an E-R diagram map directly into attributes for the appropriate relation schemas.
True or false: Multivalued attributes in an E-R diagram map directly into attributes for the appropriate relation schemas.
Which of the following is true about primary keys in entity sets?
Which of the following is true about primary keys in entity sets?
What is the purpose of keys in relationship sets?
What is the purpose of keys in relationship sets?
In an E-R diagram, how is a total participation of a weak entity set in its identifying relationship set represented?
In an E-R diagram, how is a total participation of a weak entity set in its identifying relationship set represented?
What is the purpose of removing redundant attributes from entity sets in database design?
What is the purpose of removing redundant attributes from entity sets in database design?
Which type of relationship in the E-R model can have a primary key formed by the union of the primary keys of participating entity sets?
Which type of relationship in the E-R model can have a primary key formed by the union of the primary keys of participating entity sets?
In the E-R model, if an entity set participates more than once in a relationship set, what is used to form a unique attribute name?
In the E-R model, if an entity set participates more than once in a relationship set, what is used to form a unique attribute name?
Which of the following best describes a weak entity set in the context of the E-R model?
Which of the following best describes a weak entity set in the context of the E-R model?
What is the primary key of the relation schema derived from the strong entity set 'student' in the E-R diagram?
What is the primary key of the relation schema derived from the strong entity set 'student' in the E-R diagram?
How is a weak entity set depicted in an E-R diagram?
How is a weak entity set depicted in an E-R diagram?
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