SwiftUI Core Data Quiz

Take this quiz to test your understanding of the Core Data architecture in SwiftUI.

Which method is used to save a Managed Object to storage in Core Data?

save()

persistObject()

saveContext()

commitChanges()

None

How are changes to data objects managed in Core Data before they are saved?

They are encrypted and stored.

They are stored in a temporary cache.

They are held in the managed object context.

They are directly written to the database.

None

What happens when the save() method is called on a managed object context?

The changes are committed to the persistent store.

A new entity is created.

The user interface is refreshed.

The datbase connection is closed.

None

What is a Fetch Request used for in Core Data?

To create new data attributes.

To retrieve specific data objects from storage.

To save data objects.

To modify data entities.

None

How is data stored in Core Data's persistent store?

As managed objects through an object-oriented abstraction layer.

As plain text files.

In the format specified by the developer.

Using binary encoding.

None

Which Core Data component defines the schema for managed objects?

NSFetchRequest

Entity Description

Persistent Store

Managed Object Context

None

What does the Managed Object Context maintain in relation to the persistent store?

The user interface components.

Data encryption keys.

The status of objects and their relationships.

Network status.

None

What is the purpose of the NSPersistentContainer in Core Data?

To encapsulate the Core Data stack.

To store raw data.

To manage remote database connections.

To provide a UI for managing data presentation.

None

How do you perform a one-time fetch operation in Core Data?

By creating an NSFetchRequest instance and passing it to the fetch() method.

By writing a custom SQL query.

By calling the fetchAll() method.

By using @FetchRequest with a dynamic predicate.

None

10.

What type of relationships can Core Data entities have?

Parent, child, sibling

Static, dynamic, hybrid

Single, multiple, composite

One-to-one, one-to-many, many-to-many

None

11.

What is a Managed Object Model in Core Data?

An animation handler.

A network request manager.

A SQL query generator.

A schema that defines the structure of data entities.

None

12.

Which Core Data component is responsible for managing the state of data objects?

Persistent Store

Entity Description

Managed Object Context

Data Model

None

13.

What is a Predicate used for in Core Data?

To manage user interactions.

To create new entities.

To save data to tehy database.

To define criteria for filtering data.

None

14.

How can data be sorted when using the @FetchRequest property wrapper?

By creating a new SQL query.

By defining sort rules in the database.

By applying a sorting algorithm in Swift.

By using NSSortDescriptor in the @FetchRequest.

None

15.

What is the @FetchRequest property wrapper used for in Core Data?

To save data objects.

To delete data objects.

To automatically update variables with data from the database.

To encrypt data objects.

None

16.

What is Core Data primarily used for in iOS app development?

Managing user authentication.

Storing data in a structured database.

Document and file storage.

Creating animations and transitions.

None

17.

How can attributes of a Managed Object be set before saving it to storage?

By assigning values to the object’s properties.

By using JSON parsing.

By directly modifying the database schema.

By writing a new SQL query.

None

18.

Which method is used to initialize the Persistent Container?

createContainer()

initializeCoreData()

loadPersistentStores()

initContainer()

None

19.

What does the NSPersistentContainer instance provide access to?

The database manager.

The user interface elements.

The managed object context.

The SQlLite layer.

None

20.

How are Entity descriptions defined in Core Data?

Using Xcode’s entity editing environment.

By writing custom SQL scripts.

Through a command-line tool.

By creating JSON files.

None

21.

What is the default persistent store type in Core Data?

XML

Memory-based

SQLite

Binary

None

22.

What does the Persistent Store Coordinator do in Core Data?

Manages the user interface layout.

Coordinates access to multiple persistent object stores.

Encrypts data for secure storage.

Handles user input and gestures.

None

23.

What is the purpose of a Fetch Request in Core Data?

To configure the app’s user interface.

To retrieve data objects based on defined criteria.

To perform database searches.

To store binary data.

None

24.

What is a Fetched Property in Core Data?

A type of persistent store.

A data request handler.

A direct relationship between two entities.

A weak, one-way relationship between two entities.

None

25.

What is an Entity in Core Data?

A description that defines a data model for managed objects.

A storage location for images.

A class that handles networking.

A user-defined data type.

None

26.

What is the role of the Managed Object Context in Core Data?

To manage user interactions.

To handle data encryption.

To act as a bridge between the app and the persistent store.

To store files and images.

None

27.

What are Managed Objects in Core Data?

Objects that perform data validation.

Objects that connect to remote database servers.

Database tables that store raw data.

Objects that represent data stored in the database.

None

28.

What is the purpose of the Persistent Container in Core Data?

To handle the creation of the Core Data stack.

To export data to external databases.

To store images and media files.

To manage the user interface of the app.

None

29.

Which underlying database does Core Data use by default?

PostgreSQL

MySQL

Oracle

SQLite

None

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