Avegen Health Interview Questions and Answers

Q1. 1. What is Virtual DOM in react?
Ans. 
Virtual DOM is a lightweight copy of the actual DOM, used by React to efficiently update and render components.
• Virtual DOM is a concept in React that improves performance by minimizing direct manipulation of the actual DOM.

• It is a lightweight copy of the actual DOM tree, stored in memory.

• React uses the Virtual DOM to determine the most efficient way to update the actual DOM.

• When changes are made to the Virtual DOM, Rea...read more
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Q2. Explain the lifecycle of react component
Ans. 
React component lifecycle includes mounting, updating, and unmounting phases.
• Mounting phase: constructor() -> getDerivedStateFromProps() -> render() -> componentDidMount()

• Updating phase: getDerivedStateFromProps() -> shouldComponentUpdate() -> render() -> getSnapshotBeforeUpdate() -> componentDidUpdate()

• Unmounting phase: componentWillUnmount()

• Examples: constructor() initializes state, componentDidMount() fetches data, ...read more
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Q3. There are three main stages in React Lifecycle 1. Mounting 2. Updating 3. Unmounting
Ans. 
React has three main stages in its lifecycle: Mounting, Updating, and Unmounting.
• Mounting: when a component is being created and inserted into the DOM

• Updating: when a component is being re-rendered due to changes in props or state

• Unmounting: when a component is being removed from the DOM
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Q4. What is event loop and how it works?
Ans. 
Event loop is a mechanism that allows JavaScript to perform non-blocking I/O operations.
• Event loop is responsible for handling asynchronous callbacks in JavaScript.

• It continuously checks the call stack and the task queue for any pending tasks.

• If the call stack is empty, it picks up the first task from the task queue and pushes it onto the call stack.

• It then executes the task and repeats the process until there are no m...read more
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Q5. The event loop is a mechanism in javascript that handles asynchronous operations, such as timers, network requests, etc. When an asynchronous operation is created it is added in queue, along with a callbac...read more
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Q6. In context of redux, is state mutable?
Ans. 
Yes, state is mutable in Redux.
• State in Redux is mutable, but it should not be directly mutated.

• Changes to state should be made through pure functions called reducers.

• The immutability of state is important for predictable and efficient updates.

• Examples of state mutation include using the 'push' method on an array or directly modifying an object property.
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Q7. Redux is generally considered as immutable, any new action dispatched creates a new state
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Have to make changes to a react native codebase and make it functional. Fairly easy for someone with hands-on experience.

Q1. JavaScript, React, Node.js related questions. Intermediate to advanced level
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Q1. Typical questions like why you want to join, what you like etc.
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Q1. Round with CEO and CTO Random scenario, open ended discussions
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Q2. DSA basic question, Explain Architecture of something
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Q1. Explain your jounrey as a designer in brief
Ans. 
I started as a graphic designer and evolved into a design lead with experience in UX/UI and product design.
• Began as a graphic designer creating print materials

• Transitioned to web design and learned HTML/CSS

• Expanded into UX/UI design and product design

• Led design teams and collaborated with cross-functional teams

• Continuously learning and staying up-to-date with design trends and technologies
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Q2. Showcase some case studies
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An assignment to test your research and ui design skills.

Basic Aptitude questions

I had 2 questions, and both were of medium level.

Q1. This round contained technical as well as managerial. Technical involves basic technical questions which include DSA, Networking, and finally questions on experiences/projects. The managerial round include...read more
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Q1. Basic HR questions.
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