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(fetch: all) var contacts: [Contact]

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

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

@Query var contacts: [Contact]

None

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

To delete all related objects down the chain.

To only delete parent objects.

To keep related objects unchanged.

To prevent deletion if there are relationships.

None

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

Using modelContext.add()

Using modelContext.insert()

Using modelContext.put()

Using modelContext.create()

None

What is the purpose of the SortDescriptor in a FetchDescriptor?

To create relationships between models.

To control the sorting order of fetched data.

To handle errors in data retrieval.

To fetch data from the cloud.

None

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

cascade

deny

noAction

nullify

None

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

To mark a property as required.

To encrypt data before storage.

To store data in the database cache.

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

None

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

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

Use .fetchDescriptor(sortBy: lastName.reverse)

Use @SortDescriptor(reverse: lastname)

Use FetchDescriptor.sort(reverse(lastname))

None

How is a relationship between two models defined in SwiftData?

By using the @Link macro

By using a Predicate

By using the @Join macro

By using the @Relationship macro

None

What is a Predicate in SwiftData?

A method for creating datbase related UI components.

A tool for accessing remote database servers.

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?

The app crashes.

All related objects are archived.

Related objects remain in the database.

All related objects are deleted.

None

11.

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

Data Manager

Model Container

Model Context

Model Manager

None

12.

How do you make a property unique using SwiftData?

@Attribute(.unique)

@UniqueProperty

@Persistent(unique)

@Unique

None

13.

What does the 'nullify' deletion rule do?

Leaves related objects unchanged.

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

Throws an error if an object is deleted.

Removes all related objects.

None

14.

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

Prevents the removal of objects containing relationships with other objects.

Nullifies references to deleted objects.

Leaves related objects unchanged.

Removes all related objects.

None

15.

What is the main purpose of SwiftData in iOS development?

To add support for large data models.

To create custom databases.

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

To replace the SQLite database.

None

16.

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

Using the @Transient macro.

Using the @Unique macro.

Using the @Volatile macro.

Using the @Immutable macro.

None

17.

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

To connect views to database rows.

To automate datbase model creation.

To apply behavior rules to individual model class properties.

To define database record models.

None

18.

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

noAction

deny

nullify

cascade

None

19.

How are relationships between models established in SwiftData?

Using @Link macro.

Using @Connection macro.

Using @Association macro.

Using @Relationship macro.

None

20.

Which SwiftData macro automatically updates the fetched results?

@Binding

@FetchRequest

@Query

@State

None

21.

What is the purpose of a FetchDescriptor in SwiftData?

To create new model objects.

To handle database query results.

To sort and filter fetch results.

To start search requests.

None

22.

How are fetch criteria defined in SwiftData?

Using database filters.

Using fetch queries.

Using predicates.

Using sort descriptors.

None

23.

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

remove()

delete()

deleteObject()

removeObject()

None

24.

What does the model context provide in SwiftData?

A way to directly access the underlying database.

A method to generate databse record IDs.

A programming interface for performing operations on stored data.

A tool for creating new databases.

None

25.

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

By setting the container to use a volatile storage mode.

By declaring the container as a temporary container.

By using the @Transient macro.

By setting isStoredInMemoryOnly to true in the ModelConfiguration.

None

26.

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

persistentContainer(for:)

dataContainer(for:)

modelContainer(for:)

databaseContainer(for:)

None

27.

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

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

let modelContainer = createContainer(Contact)

let modelContainer = CoreDataManager(Contact)

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 create custom animations.

To write data to a datebase.

None

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