React Native Technology & Digital Applications 2

Question 1

Which React Native API allows you to detect whether the device is online or offline?

Accepted Answer

NetInfo from @react-native-community/netinfo

Answer

The @react-native-community/netinfo package provides the NetInfo API to monitor network connectivity state.

Question 2

What does the `useWindowDimensions` hook return in React Native?

Accepted Answer

The width and height of the app window that update on rotation

Answer

useWindowDimensions returns an object with width and height that automatically updates when the window size changes (e.g., on orientation change).

Question 3

In React Native, which component should you use to handle keyboard overlap with input fields?

Accepted Answer

KeyboardAvoidingView

Answer

KeyboardAvoidingView automatically adjusts its height or padding when the keyboard appears, preventing inputs from being hidden.

Question 4

What is the purpose of the `Linking` API in React Native?

Accepted Answer

To open URLs, deep links, and external apps like phone dialers or email clients

Answer

The Linking API handles outgoing deep links and universal links, letting you open URLs, phone numbers, or other apps.

Question 5

Which storage solution ships built-in with React Native for persisting small key-value data?

Accepted Answer

AsyncStorage

Answer

AsyncStorage is the built-in (now community-maintained) asynchronous, unencrypted key-value store for React Native apps.

React Native Practice Test