1. These questions come from the Django project tutorial materials. What is the default database backend for Django projects when they are first set up? Oracle sqlite3 MySQL PostgreSQL MongoDB 2. What file contains the list of INSTALLED_APPS in a Django project? views.py apps.py urls.py manage.py settings.py 3. What does the "python manage.py migrate" command do? Makes a backup copy of db.sqlite3 Moves the application to a new server Builds/updates the database structure for the project Moves login sessions to the backing store 4. What is the purpose of the models.py file? To define the shape of the data objects to be stored in a database To apply a regular expression to the incoming path in the request object To make building views for your application simpler To connect your database to the Django administration interface