Antino Front end Developer Interview Questions and Answers

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Q1. Controlled and Un Controlled components
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Q2. Hooks in functional components
Ans. 
Hooks are functions that let you use state and other React features in functional components.
• Hooks were introduced in React 16.8.

• useState() hook is used to add state to functional components.

• useEffect() hook is used for side effects in functional components.

• Custom hooks can be created to reuse logic across components.
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Developing features of Shopping Cart page like add to cart,remove from cart

Q1. How to comment in javascript
Ans. 
Comments in JavaScript are used to explain the code and are not executed by the browser.
• Use // for single line comments

• Use /* */ for multi-line comments

• Comments help other developers understand your code
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Q2. Write code of async-await
Ans. 
Async-await is a feature in JavaScript that allows for asynchronous programming using promises.
• Use the 'async' keyword before a function to make it asynchronous

• Use the 'await' keyword inside an async function to wait for a promise to resolve

• Async-await simplifies asynchronous code and makes it easier to read and maintain
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Q1. Defined your self to about your aducation and
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Q2. What is computer in your language
Ans. 
A computer is an electronic device that can perform various tasks by executing instructions given to it.
• A computer is made up of hardware components such as CPU, memory, and storage devices.

• It runs on an operating system and software applications.

• Computers can be used for various purposes such as communication, entertainment, and work.

• Examples of computers include desktops, laptops, tablets, and smartphones.
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Q3. What about html What is the you html in frontend
Ans. 
HTML is the standard markup language for creating web pages and applications.
• HTML stands for HyperText Markup Language

• It is used to structure content on the web

• HTML elements are used to define the different parts of a webpage

• Examples include <h1> for headings, <p> for paragraphs, and <img> for images
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Q1. Is multiple inheritance supported in Java
Ans. 
No, Java does not support multiple inheritance.
• Java only supports single inheritance through classes.

• However, multiple inheritance can be achieved through interfaces.

• Diamond problem can be avoided in interfaces by implementing default methods.

• Example: class A extends B implements C, D {}
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Q2. No, it is supported through interfaces only .
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Q1. How does React native works internally? Like alloting memory to rendering JS code on android and ios devices.
Ans. 
React Native works by using a bridge to communicate between JavaScript and native code on iOS and Android devices.
• React Native uses a JavaScript thread to handle logic and a separate thread for UI rendering.

• The bridge allows for communication between the JavaScript thread and native code on the device.

• React Native uses a virtual DOM to optimize rendering performance.

• Memory allocation is handled by the device's operatin...read more
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Q2. Do you know about React middlewares? why are they used?
Ans. 
React middlewares are functions that intercept and modify requests and responses in a React application.
• Middlewares are used to add additional functionality to an application without modifying the core code.

• They can be used for authentication, logging, error handling, and more.

• Examples of React middlewares include Redux Thunk, Redux Saga, and React Router.

• They are typically implemented using higher-order functions.

• Midd...read more
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Q3. Do you know about React Native Context Api?
Ans. 
Yes, React Native Context API is a way to manage global state in React Native applications.
• Context API allows passing data through the component tree without having to pass props down manually at every level.

• It is useful for managing global state such as user authentication, theme, and language preferences.

• Context API consists of two parts: the Provider component and the Consumer component.

• The Provider component is use...read more
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Q4. React Native Functional components lifecycle methods?
Ans. 
React Native functional components have limited lifecycle methods compared to class components.
• Functional components use useEffect() instead of componentDidMount() and componentDidUpdate()

• useEffect() can be used to handle component mount, update, and unmount

• useEffect() takes a callback function and an array of dependencies as arguments

• The callback function can return a cleanup function to handle component unmount

• Functi...read more
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Q5. App store and playstore publishing related questions.
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