Preconditions describe what?

Preconditions describe what?

• A. The steps to execute
• B. The conditions that must be true before the use case begins
• C. The postconditions
• D. The data types

Answer: (B)

Preconditions are the conditions that must be true before a use case begins. They set the starting context and ensure the system is ready to execute, such as requiring the user to be logged in or necessary resources to be available. If these requirements aren’t met, the use case shouldn’t start because the scenario wouldn’t be valid or could fail. This is different from postconditions, which describe the state after the use case finishes, and it isn’t about the steps to perform or the data types involved.

Preconditions are the conditions that must be true before a use case begins. They set the starting context and ensure the system is ready to execute, such as requiring the user to be logged in or necessary resources to be available. If these requirements aren’t met, the use case shouldn’t start because the scenario wouldn’t be valid or could fail. This is different from postconditions, which describe the state after the use case finishes, and it isn’t about the steps to perform or the data types involved.