The Festival Theatre produces twelve plays per year. Patrons can buy tickets for

Question

The Festival Theatre produces twelve plays per year. Patrons can buy tickets for a single play; alternatively, they can purchase a season pass for either three plays or six plays. Three-play passes offer a 10% discount from the prices of single tickets; six-play passes, a 25% discount. Since most patrons live within 30 miles of the theatre, all ticket sales are done at the box office only. The theatre has an "open seating" plan, so patrons do not reserve a specific seat at any performance.
Data flow diagrams incorporate four types of symbols. Give one example of each symbol you would expect to find in a Level Zero data flow diagram of the preceding process. (You do not need to create the actual DFD.)

Explanation / Answer

The four types of symbols that a database consists of are:

Patrons who come to watch the theatre productions are an example of Entities.

The enquiries that the patrons make at the box office (eg.whether seats are available for a particular show) are an example of data flow.

The ticket reservation procedure of alotting a seat to a patron is a process.

The box office checks for availability of seats from a data store which stores the information regarding how many seats are vacant for a particular show. The information regarding how many seats are booked for a particular show are also stored in the same data source.

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