Podcast
Questions and Answers
Which of the following is a primary key for the Authors entity?
Which of the following is a primary key for the Authors entity?
- BookID
- AuthorID (correct)
- UserID
- Name
What is the purpose of the 'Borrowing' entity in the simplified ER diagram?
What is the purpose of the 'Borrowing' entity in the simplified ER diagram?
- To store details such as BorrowDate and ReturnDate (correct)
- To represent the relationship between books, authors, and users
- To capture the basic functionalities of a library system
- To link Books and Authors
What does 'PK' stand for in the context of the ER diagram explained?
What does 'PK' stand for in the context of the ER diagram explained?
- Personal Knowledge
- Public Key
- Primary Key (correct)
- Primary Knowledge
In the library system described, what kind of relationship exists between Books and Authors?
In the library system described, what kind of relationship exists between Books and Authors?
What attribute in the Users entity acts as a unique identifier for each user in the library system?
What attribute in the Users entity acts as a unique identifier for each user in the library system?
Which view can be queried to obtain information about the Oracle database's data files?
Which view can be queried to obtain information about the Oracle database's data files?
What does the 'Written_By' relationship with a cardinality of '1, M' indicate?
What does the 'Written_By' relationship with a cardinality of '1, M' indicate?
What does the 'Borrowed_By' relationship with a cardinality of '0, M' signify?
What does the 'Borrowed_By' relationship with a cardinality of '0, M' signify?
What do the connectors in an ER diagram represent?
What do the connectors in an ER diagram represent?
Why is understanding the elements of an ER diagram crucial for designing and understanding database schemas?
Why is understanding the elements of an ER diagram crucial for designing and understanding database schemas?
