NativeScript for Mobile App Development State Management and Application Architecture 2

Question 1

In NativeScript with Angular, what decorator is used to create a service that holds shared application state?

Accepted Answer

@Injectable

Answer

@Component

Answer

@NgModule

Answer

@Directive

Question 2

How does NativeScript's Observable.set() method differ from directly assigning a property value?

Accepted Answer

set() triggers propertyChange notifications, direct assignment does not

Answer

set() is asynchronous while direct assignment is synchronous

Answer

set() validates the type before storing

Answer

set() automatically persists values to storage

Question 3

Which architectural approach is most suitable for large NativeScript applications that need predictable state changes?

Accepted Answer

Flux/Redux unidirectional data flow

Answer

Two-way binding only

Answer

Direct DOM manipulation

Answer

Polling-based state sync

Question 4

In NativeScript, what is the recommended way to handle asynchronous operations like API calls within a ViewModel?

Accepted Answer

Using Promises or async/await and updating Observable properties on completion

Answer

Blocking the UI thread with synchronous XMLHttpRequest

Answer

Writing native Java/Swift code for all network calls

Answer

Using setTimeout loops to poll for data

Question 5

What happens to application state stored only in memory when a NativeScript app is sent to the background on iOS?

Accepted Answer

It may be lost if the OS terminates the app to free memory

Answer

It is automatically serialized to disk by NativeScript

Answer

It is transferred to iCloud automatically

Answer

It remains perfectly intact with no risk of loss

Question 6

In NativeScript with Vue, how is Vuex state typically accessed inside a component?

Accepted Answer

Through this.$store.state or mapState helper

Answer

Via direct import of the store object only

Answer

Through the bindingContext property

Answer

By reading ApplicationSettings synchronously

Question 7

Which lifecycle event in a NativeScript page is the best place to initialize ViewModel state when the page first loads?

Accepted Answer

navigatedTo (or loaded for first-time init)

Answer

navigatingFrom

Answer

unloaded

Answer

suspend