TCS Front end Developer Interview Questions, Process, and Tips

Q1. What are spread and rest operator
Ans. 
Spread operator allows an iterable to be expanded in places where zero or more arguments are expected. Rest operator collects all the remaining elements into an array.
• Spread operator is denoted by three dots (...)

• Spread operator can be used to copy an array or object

• Rest operator is also denoted by three dots (...) and is used in function parameters to collect all remaining arguments into an array
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Q2. What are pure functions
Ans. 
Pure functions are functions that always return the same output for the same input and have no side effects.
• Always return the same output for the same input

• Have no side effects, meaning they do not modify external state or variables

• Pure functions are predictable and easier to test and debug
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Create a corouesel with react

Q1. Some basic info on my communication
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Q2. Previous project and company experience
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Q1. Why should we hire you
Ans. 
I have a strong background in front end development with a proven track record of delivering high-quality projects on time.
• I have extensive experience in HTML, CSS, and JavaScript

• I am proficient in using front end frameworks like React and Angular

• I have a keen eye for design and user experience, ensuring that the projects I work on are visually appealing and user-friendly

• I am a team player and have excellent communicat...read more
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Q2. Tell me about yourself
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I am a passionate front end developer with experience in HTML, CSS, JavaScript, and responsive design.
• Experienced in creating responsive web applications

• Proficient in HTML, CSS, and JavaScript

• Familiar with front end frameworks like React and Angular

• Strong problem-solving skills and attention to detail
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45,logical ,codding testing

Echo system human impact

Attitude test are use to personality and knowledge

Html , css , java , reactjs

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Q1. Java script basic questions
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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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