The exhibit shows a relation for a companys projects. Which candidate key(s) would best
serve as the primary key for this relation?

Answer : D
Which pair of relational algebraic operations requires union compatibility?
Answer : C
Which of the following best describes the information contained in the data dictionary (or
system catalog)?
Answer : A
Which term best describes one or more database operations that are executed as a single unit?
Answer : B
What is a relational database domain?
Answer : D
Your company must choose which type of database to use for a new project. Which of the
following lists three characteristics of file-based database systems?
Answer : D
Which statement accurately describes a characteristic of attributes?
Answer : C