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 var contacts: [Contact]

@Query(type: all) 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 prevent deletion if there are relationships.

To only delete parent objects.

To delete all related objects down the chain.

To keep related objects unchanged.

None

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

Using modelContext.put()

Using modelContext.add()

Using modelContext.insert()

Using modelContext.create()

None

What is the purpose of the SortDescriptor in a FetchDescriptor?

To fetch data from the cloud.

To handle errors in data retrieval.

To control the sorting order of fetched data.

To create relationships between models.

None

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

nullify

cascade

deny

noAction

None

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

To mark a property as required.

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

To store data in the database cache.

To encrypt data before storage.

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 @Join macro

By using a Predicate

By using the @Relationship macro

By using the @Link macro

None

What is a Predicate in SwiftData?

A tool for accessing remote database servers.

A logical expression used to define fetch criteria.

A method for creating datbase related UI components.

A function for creating custom animations.

None

10.

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

Related objects remain in the database.

All related objects are deleted.

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 Context

Model Container

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?

Throws an error if an object is deleted.

Removes all related objects.

Leaves related objects unchanged.

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

None

14.

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

Nullifies references to deleted objects.

Prevents the removal of objects containing relationships with other 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 provide a declarative approach to persistent data storage integrated with SwiftUI.

To create custom databases.

To replace the SQLite database.

None

16.

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

Using the @Volatile macro.

Using the @Immutable macro.

Using the @Unique macro.

Using the @Transient macro.

None

17.

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

To apply behavior rules to individual model class properties.

To automate datbase model creation.

To connect views to database rows.

To define database record models.

None

18.

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

cascade

nullify

noAction

deny

None

19.

How are relationships between models established in SwiftData?

Using @Association macro.

Using @Relationship macro.

Using @Connection macro.

Using @Link macro.

None

20.

Which SwiftData macro automatically updates the fetched results?

@FetchRequest

@Query

@Binding

@State

None

21.

What is the purpose of a FetchDescriptor in SwiftData?

To handle database query results.

To start search requests.

To create new model objects.

To sort and filter fetch results.

None

22.

How are fetch criteria defined in SwiftData?

Using predicates.

Using sort descriptors.

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 tool for creating new databases.

A method to generate databse record IDs.

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 setting the container to use a volatile storage mode.

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?

modelContainer(for:)

databaseContainer(for:)

persistentContainer(for:)

dataContainer(for:)

None

27.

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

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

let modelContainer = createContainer(Contact)

let modelContainer = CoreDataManager(Contact)

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

None

28.

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

To manage database storage.

To write data to a datebase.

To designate a class as a SwiftData model.

To create custom animations.

None

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