Advanced Swift 2 Application Development (Video 14)

This video tutorial explains how to retrieve data from a Core Data database using NSFetchResultsController in an iOS application. It covers the setup of the fetch results controller, understanding SQLite database files, implementing delegate methods for data updates, and refactoring code to display data in a table view. The tutorial also provides insights into the roles of different SQLite files and demonstrates how to run the app to see the data appear.

What is the primary purpose of using NSFetchResultsController in an application?

• To manage user authentication

• To create new database entries

• To retrieve and display data efficiently

• To delete data from the database

Which file acts as a journal for recording changes before they are committed to the database?

• The main database file

• The write-ahead log (WAL) file

• The shared memory file

• The configuration file

What tool can be used to view the contents of an SQLite database?

• Database Browser

• MySQL Workbench

• SQL Server Management Studio

• Oracle SQL Developer

What is the role of the delegate methods in NSFetchResultsController?

• To configure app settings

• To handle user input

• To update the UI when data changes

• To manage network requests

How is data sorted when using NSFetchResultsController?

• By default order

• By a specified sort descriptor

• Randomly

• By the order of insertion

What is the purpose of the 'fetch' method in NSFetchResultsController?

• To update data in the database

• To retrieve data from the database

• To create a new database

• To delete data from the database

What change is made to the properties in the data model to ensure they are always available?

• Removing all constraints

• Changing from non-optional to optional

• Changing from optional to non-optional

• Adding default values