How do you discuss mistakes and trade-offs?

Be prepared for both of the following prompts:

1. Tell me about a major mistake you made as a software engineer. Explain the situation, the impact, how you responded, what you learned, and what you changed afterward.

2. A customer has already placed a food order, and then the restaurant reports that one of the ordered items is out of stock. How would you handle it? Discuss the product and operational response, including customer communication, substitutions, refunds or credits, restaurant workflow, courier impact, and long-term product improvements.