SwiftUI SwiftData Quiz

Test your understanding of SwiftData and how it is used to store and manage persistent data within SwiftUI apps.

How do you fetch all stored objects of a specific model using the @Query macro?

@Query(type: all) var contacts: [Contact]

@Query var contacts: [Contact]

@Query(fetch: all) var contacts: [Contact]

@Query(objects: all) var contacts: [Contact]

None

What is the function of the 'cascade' delete rule?

To delete all related objects down the chain.

To keep related objects unchanged.

To only delete parent objects.

To prevent deletion if there are relationships.

None

How is a model object inserted into the database in SwiftData?

Using modelContext.put()

Using modelContext.insert()

Using modelContext.create()

Using modelContext.add()

None

What is the purpose of the SortDescriptor in a FetchDescriptor?

To handle errors in data retrieval.

To create relationships between models.

To control the sorting order of fetched data.

To fetch data from the cloud.

None

Which deletion rule should be used to keep references to deleted objects unchanged?

deny

cascade

nullify

noAction

None

What is the function of the @Transient macro in SwiftData?

To store data in the database cache.

To encrypt data before storage.

To indicate that a property should not be stored in the database.

To mark a property as required.

None

How do you define a fetch descriptor that sorts results by contact last name in reverse order?

Use FetchDescriptor.sort(reverse(lastname))

Use FetchDescriptor(predicate, sortBy: [SortDescriptor(Contact.lastname, order: .reverse)])

Use .fetchDescriptor(sortBy: lastName.reverse)

Use @SortDescriptor(reverse: lastname)

None

How is a relationship between two models defined in SwiftData?

By using a Predicate

By using the @Join macro

By using the @Link macro

By using the @Relationship macro

None

What is a Predicate in SwiftData?

A tool for accessing remote database servers.

A method for creating datbase related UI components.

A logical expression used to define fetch criteria.

A function for creating custom animations.

None

10.

What is the default behavior when a model object with related objects is deleted?

All related objects are deleted.

Related objects remain in the database.

All related objects are archived.

The app crashes.

None

11.

Which class in SwiftData provides an interface between the model schema and the database?

Model Container

Model Context

Model Manager

Data Manager

None

12.

How do you make a property unique using SwiftData?

@Unique

@UniqueProperty

@Persistent(unique)

@Attribute(.unique)

None

13.

What does the 'nullify' deletion rule do?

Does not remove related objects but nullifies references to the deleted objects.

Leaves related objects unchanged.

Removes all related objects.

Throws an error if an object is deleted.

None

14.

What does the 'deny' deletion rule do in SwiftData?

Leaves related objects unchanged.

Prevents the removal of objects containing relationships with other objects.

Nullifies references to deleted objects.

Removes all related objects.

None

15.

What is the main purpose of SwiftData in iOS development?

To create custom databases.

To provide a declarative approach to persistent data storage integrated with SwiftUI.

To replace the SQLite database.

To add support for large data models.

None

16.

How do you specify that a property should not be stored in the database?

Using the @Immutable macro.

Using the @Unique macro.

Using the @Volatile macro.

Using the @Transient macro.

None

17.

What is the purpose of the @Attribute macro in SwiftData?

To define database record models.

To automate datbase model creation.

To connect views to database rows.

To apply behavior rules to individual model class properties.

None

18.

Which deletion rule removes all related objects when a model object is deleted?

deny

nullify

noAction

cascade

None

19.

How are relationships between models established in SwiftData?

Using @Connection macro.

Using @Association macro.

Using @Relationship macro.

Using @Link macro.

None

20.

Which SwiftData macro automatically updates the fetched results?

@Query

@Binding

@State

@FetchRequest

None

21.

What is the purpose of a FetchDescriptor in SwiftData?

To create new model objects.

To sort and filter fetch results.

To start search requests.

To handle database query results.

None

22.

How are fetch criteria defined in SwiftData?

Using sort descriptors.

Using predicates.

Using fetch queries.

Using database filters.

None

23.

Which method in the model context is used to delete a model object?

deleteObject()

delete()

removeObject()

remove()

None

24.

What does the model context provide in SwiftData?

A method to generate databse record IDs.

A tool for creating new databases.

A programming interface for performing operations on stored data.

A way to directly access the underlying database.

None

25.

How do you store data in memory only using a model container?

By declaring the container as a temporary container.

By using the @Transient macro.

By setting the container to use a volatile storage mode.

By setting isStoredInMemoryOnly to true in the ModelConfiguration.

None

26.

Which modifier is used to create a model container for a WindowGroup?

databaseContainer(for:)

dataContainer(for:)

persistentContainer(for:)

modelContainer(for:)

None

27.

How do you create a model container for the Contact model?

let modelContainer = createContainer(Contact)

let modelContainer = CoreDataManager(Contact)

let modelContainer = try? ModelContainer(for: Contact.self)

let modelContainer = new ModelContainer(for: Contact.self)

None

28.

What is the purpose of the @Model macro in SwiftData?

To manage database storage.

To designate a class as a SwiftData model.

To write data to a datebase.

To create custom animations.

None

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