Exercises
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4.1. Identify and briefly describe four types of requirements that may be defined for a computer-based system.
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4.2. Discover ambiguities or omissions in the following statement of the requirements for part of a ticket-issuing system:
An automated ticket machine sells rail tickets. Users select their destination and input a credit card and a personal identification number. The rail ticket is issued and their credit card account charged. When the user presses the start button, a menu display of potential destinations is activated, along with a message to the user to select a destination and the type of ticket required. Once a destination has been selected, the ticket price is displayed and customers are asked to input their ...
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