Question

15 which statement is true about cross - platform development?
a. requires separate teams for android and ios
b. cannot access native apis
c. offers lower cost and faster deli
d. uses only swift programming
16 which thread in react native is responsible for running app logic?
a. native thread
b. ui thread
c. javascript thread
d. render thread
17 which tool is commonly used to write code for react native?
a. wordpad
b. powerpoint
c. visual studio code
d. photoshop
18 which tool is mainly used for android debugging in mobile development?
a. xcode
b. android studio

Explanation:

• Question 15: Cross - platform development allows code reuse across platforms, reducing the need for separate teams (eliminating option a). It can access native APIs (eliminating option b) and doesn't use only Swift (eliminating option d). It offers lower cost and faster delivery as code is shared across platforms.
• Question 16: In React Native, the JavaScript thread is responsible for running app logic. The native thread interacts with native components, the UI thread is for UI - related operations in some native contexts (not the main app logic in React Native), and the render thread is more about rendering the UI.
• Question 17: Visual Studio Code is a commonly used code - writing tool. WordPad is a basic text editor (not for code in a professional sense for React Native), PowerPoint is for presentations, and Photoshop is for image editing.
• Question 18: Android Studio is the main tool for Android development and debugging. Xcode is for iOS development.

Answer:

1. C. Offers lower cost and faster delivery
2. C. JavaScript thread
3. C. Visual Studio Code
4. B. Android Studio