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Consider the diagram above. The Trail Listing System is designed for people who want to learn about the trails in the area. New trails can be added, and existing trails can be removed. An employee at the trail listing company wants to view a list of all the employees currently in the system. A portion of the system includes the following classes. Notice that no methods are listed yet. In which class does the GetEmployees() method belong?

Self-calls, messages that begin and end on the same lifeline, are valid elements in sequence diagrams.

In a sequence diagram, who or what initiates the first message?

In the table below which bridges Certificate and Course, both course_id and certificate_id are ___ ?

Wireframes can be created totally by hand, using software tools that include AI elements, or using software tools with no AI elements.

The FK goes on the ____ side of a one-to-many relationship line.

Consider the diagram above. The Trail Listing System is designed for people who want to learn about the trails in the area. New trails can be added, and existing trails can be removed. An employee at the trail listing company wants to view the details of another employee. A portion of the system includes the following classes. Notice that no methods are listed yet. In which class does the GetEmployee() method belong?

Component reuse is a plus when creating wireframes.

Consider the diagram above. The Bank Account System is designed for a bank to keep track of the transactions for each customer account. Each account has one or more transactions. Each transaction is related to a single account. Accounts also have one or more customers.  New transactions can be added. New customers can be added to an account and a customer can be removed from an account. When a customer is removed from an account, they are still part of the Bank Account System. Which is the correct relationship line between Customer and Account?

Why are software requirements considered an essential communication tool in development?