Difficulty: Medium

Average Score: 67%

A program adds a service fee to the total cost of concert tickets when the tickets are printed and mailed to customers. Another service fee is also added if the tickets are delivered overnight.

Which control structure should be used?

Rationale

Multiple if statements should be used.

Using multiple if statements allows the program to evaluate each condition related to the service fees independently, ensuring that all applicable fees are added to the total cost as needed based on the customer's choices for ticket delivery and printing.

A (While loop) YOUR ANSWER

A while loop is designed for scenarios where an action needs to be repeated as long as a certain condition remains true. In this case, the addition of service fees is not repetitive but rather conditional based on specific criteria. Therefore, a while loop is not suitable for implementing the fee structure.

B (Multiple if statements) CORRECT

This option is correct because multiple if statements can independently check for the conditions of adding service fees for printed tickets and overnight delivery. This allows the program to apply both fees if necessary, efficiently handling each condition without the constraints of alternative choices.

C (Do-while loop) YOUR ANSWER

A do-while loop performs an action at least once and then continues based on a condition. However, this structure is not appropriate for the service fee calculations, as you do not want to execute fee additions based on conditions that may not be met after the first iteration.

D (If statement) YOUR ANSWER

An if statement alone would only allow for a single condition check. While it could be used for one of the fees, it would not support the need to check multiple conditions independently, making it less effective compared to using multiple if statements.

Conclusion

In this scenario, the best choice is to utilize multiple if statements to accurately assess and apply all applicable service fees associated with concert ticket transactions. This approach ensures that each condition is checked independently, accommodating various customer preferences for ticket delivery and printing, resulting in a correct and comprehensive total charge.

Which control structure should be used?

Multiple if statements should be used.

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