Final answer:
To allow other apps to query a database, override the ContentProvider class's query, insert, update, and delete methods. These methods manage external access to the app's data.
Step-by-step explanation:
To allow other apps to query your database, you can override the query, insert, update, and delete methods of the ContentProvider class. These methods are essential for managing access to your data by external applications. By overriding them, you provide a controlled interface for querying and modifying the data in your app's database, which can include operations such as reading a list of records, inserting a new record, updating existing records, and removing records.