Riser Techub React Native Developer Interview Questions and Answers

React Native bridge is a communication layer between JavaScript code and native code.

• It allows React Native to interact with native modules written in Objective-C, Java, or Swift.

• The bridge sends messages between the two environments, allowing for seamless integration.

• The bridge can also be used to pass data between the two environments.

• For example, a React Native app might use the bridge to access the device's camera ...read more

HOC is a function that takes a component and returns a new component with additional functionality.

• HOC is a design pattern in React.

• It allows reusing component logic.

• HOC can be used for cross-cutting concerns like authentication, logging, etc.

• HOC can be created using a function that takes a component and returns a new component.

• The new component can render the original component with additional props or wrap it with ot...read more

The useEffect Hook in React Native is used to perform side effects in functional components. It is similar to lifecycle methods in class components.

• useEffect Hook is used to handle side effects in functional components.

• It is called after the component has rendered and can be used to fetch data, subscribe to events, or update the DOM.

• It takes two arguments: a function that contains the side effect logic, and an optional...read more

Redux is a predictable state container for JavaScript apps.

• Redux is a state management library for JavaScript applications.

• It provides a centralized store to manage the state of an application.

• Redux follows a unidirectional data flow pattern.

• Actions are dispatched to update the state in the store.

• Reducers are pure functions that update the state based on the dispatched actions.

• Selectors are used to retrieve data from t...read more

Redux Thunk and Redux Saga are middleware libraries for Redux that allow for asynchronous actions.

• Redux Thunk is a simple middleware that allows for asynchronous actions by returning a function instead of an action object.

• Redux Saga is a more powerful middleware that uses generator functions to handle asynchronous actions and allows for more complex control flow.

• Both libraries are commonly used in React Native applicat...read more

My highest priority HOC components are those that handle authentication and authorization.

• Authentication HOCs like withAuthenticator and withAuthContext

• Authorization HOCs like withAuthorization and withRoleBasedAccessControl

• HOCs that handle user sessions and persistent login state

The best practice for calling APIs is to use asynchronous requests and handle errors properly.

• Use asynchronous requests to prevent blocking the UI thread.

• Handle errors properly by checking for response status codes and handling network failures.

• Implement caching mechanisms to improve performance and reduce unnecessary API calls.

• Consider using libraries or frameworks like Axios or Fetch for making API requests.

• Follow RE...read more

Props are short for properties and are used to pass data from one component to another in React Native.

• Props are read-only and cannot be modified by the child component.

• Props are passed down from parent to child component.

• Props can be any data type, including strings, numbers, objects, and functions.

• Props are accessed using the 'this.props' syntax in class components and 'props' in functional components.

• Props can have ...read more