Question: In a brief analytical response, explain what new option becomes available after a mobile app is released and identify the data source and the evaluation sets it can affect.

Sample answer: Once the app is in users’ hands, the team can use real usage data to revise the development and evaluation sets. In other words, release makes it possible to refresh those sets with examples from actual users instead of keeping the original splits unchanged forever.

Key points:

• The app has already been released.
• Real user data becomes available.
• The development set can be revised.
• The evaluation/test set can be revised.

Rubric: A strong response should mention the post-release timing, name real user data as the source for updates, and identify both the development set and the test set as changeable. Do not award credit for unrelated claims about model training procedures or performance guarantees.