SampleMidterm.docx - For Questions 1-2 give the letters of...

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For Questions 1-2, give the letters of all correct answers (there may be more than one). [12 pts] 1. Which of the properties listed below are benefits of using a relational database for a large collection of interrelated data? A. Different users of the database can be allowed access to different subsets of the stored data B. You do not need specialized personnel to design, implement and maintain a database, since any user can change the schema of a database at any time C. It will reduce the time to develop new applications that use the data by supplying developers with a consistent model of the data D. Each user of the database typically maintains his or her own redundant copy of the part of the stored data that is of the most interest to them E. The data can be rearranged so that the most common operations run more quickly 2. Which of the following are requirements for a two-dimensional table to be a relation? A. It has a single column that can serve as primary key B. It contains a foreign key referencing some other table C. Each column has a unique name D. No two rows are identical E. Each location in the table stores at most one value
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