NativeScript for Mobile App Development Study Guide 2026
Everything you need to pass the NativeScript for Mobile App Development exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📚 NativeScript for Mobile App Development Topics to Study (21)
✍️ Sample NativeScript for Mobile App Development Questions & Answers
1. What method on an Observable object triggers property change notifications?
Calling `this.set('propertyName', value)` on an Observable updates the value and fires a propertyChange event that updates bound UI.
2. When should you prefer using NativeScript's ApplicationSettings over an in-memory Observable for storing user preferences?
ApplicationSettings persists data to native storage (NSUserDefaults/SharedPreferences) so user preferences are retained across app restarts, unlike in-memory Observables.
3. Which NativeScript module allows persistent local storage of application state across sessions?
The ApplicationSettings module (part of @nativescript/core) provides key-value storage backed by NSUserDefaults (iOS) and SharedPreferences (Android) for persistent state.
4. What property on a NativeScript Page sets the data source for binding?
Setting `page.bindingContext` to an Observable object makes its properties available for binding in the page's XML template.
5. Which lifecycle event in a NativeScript page is the best place to initialize ViewModel state when the page first loads?
The 'loaded' event fires when the page is first added to the visual tree, making it the appropriate place for initial ViewModel setup and data loading.
6. How does NativeScript's Observable.set() method differ from directly assigning a property value?
Observable.set() updates the property AND fires the propertyChange event so bound UI elements update automatically, unlike silent direct property assignment.