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?

saveContext()

save()

persistObject()

commitChanges()

None

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

They are stored in a temporary cache.

They are held in the managed object context.

They are encrypted and stored.

They are directly written to the database.

None

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

The user interface is refreshed.

A new entity is created.

The datbase connection is closed.

The changes are committed to the persistent store.

None

What is a Fetch Request used for in Core Data?

To modify data entities.

To create new data attributes.

To save data objects.

To retrieve specific data objects from storage.

None

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

As plain text files.

Using binary encoding.

As managed objects through an object-oriented abstraction layer.

In the format specified by the developer.

None

Which Core Data component defines the schema for managed objects?

Managed Object Context

NSFetchRequest

Entity Description

Persistent Store

None

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

Network status.

The status of objects and their relationships.

The user interface components.

Data encryption keys.

None

What is the purpose of the NSPersistentContainer in Core Data?

To manage remote database connections.

To provide a UI for managing data presentation.

To store raw data.

To encapsulate the Core Data stack.

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 calling the fetchAll() method.

By writing a custom SQL query.

By using @FetchRequest with a dynamic predicate.

None

10.

What type of relationships can Core Data entities have?

Single, multiple, composite

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

Parent, child, sibling

Static, dynamic, hybrid

None

11.

What is a Managed Object Model in Core Data?

A network request manager.

A SQL query generator.

A schema that defines the structure of data entities.

An animation handler.

None

12.

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

Entity Description

Data Model

Managed Object Context

Persistent Store

None

13.

What is a Predicate used for in Core Data?

To manage user interactions.

To save data to tehy database.

To create new entities.

To define criteria for filtering data.

None

14.

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

By using NSSortDescriptor in the @FetchRequest.

By defining sort rules in the database.

By applying a sorting algorithm in Swift.

By creating a new SQL query.

None

15.

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

To delete data objects.

To encrypt data objects.

To automatically update variables with data from the database.

To save data objects.

None

16.

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

Storing data in a structured database.

Managing user authentication.

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 directly modifying the database schema.

By writing a new SQL query.

By using JSON parsing.

None

18.

Which method is used to initialize the Persistent Container?

createContainer()

loadPersistentStores()

initContainer()

initializeCoreData()

None

19.

What does the NSPersistentContainer instance provide access to?

The SQlLite layer.

The user interface elements.

The managed object context.

The database manager.

None

20.

How are Entity descriptions defined in Core Data?

By writing custom SQL scripts.

Through a command-line tool.

Using Xcode’s entity editing environment.

By creating JSON files.

None

21.

What is the default persistent store type in Core Data?

Memory-based

Binary

SQLite

XML

None

22.

What does the Persistent Store Coordinator do in Core Data?

Handles user input and gestures.

Encrypts data for secure storage.

Manages the user interface layout.

Coordinates access to multiple persistent object stores.

None

23.

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

To retrieve data objects based on defined criteria.

To perform database searches.

To configure the app’s user interface.

To store binary data.

None

24.

What is a Fetched Property in Core Data?

A weak, one-way relationship between two entities.

A type of persistent store.

A direct relationship between two entities.

A data request handler.

None

25.

What is an Entity in Core Data?

A description that defines a data model for managed objects.

A class that handles networking.

A user-defined data type.

A storage location for images.

None

26.

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

To store files and images.

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

To handle data encryption.

To manage user interactions.

None

27.

What are Managed Objects in Core Data?

Objects that connect to remote database servers.

Objects that perform data validation.

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 store images and media files.

To handle the creation of the Core Data stack.

To export data to external databases.

To manage the user interface of the app.

None

29.

Which underlying database does Core Data use by default?

PostgreSQL

MySQL

SQLite

Oracle

None

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