Developers & Programmers Interview

Interview Question:

Can you explain the concept of virtual DOM and how it is used in ReactJS?

Candidate's Answer:

So virtual Dome take a major role in React JS.So it is an advantage.And the key feature of React Virtual Dom is a.Shallow copy of actual Dome and it is way faster than actual Dome.And it's a take a less memory and according to real Dome.Yeah, it it's take a major role to.Component to render.Yeah.

Evaluation:

Your answer touches on some key points about the virtual DOM in ReactJS. It is correct that the virtual DOM is a representation of the actual DOM, and that it is faster and more efficient in terms of performance. However, your explanation could be improved by providing more specific details about how the virtual DOM works and how it helps in improving ReactJS performance.

To improve your answer, you could mention that when a component's state changes in React, the entire component is re-rendered in the virtual DOM first before being updated in the actual DOM. This process allows React to efficiently determine only the specific parts of the DOM that need to be updated, resulting in faster rendering and improved overall performance.

Overall, your answer provides a basic understanding of the virtual DOM in ReactJS, but could benefit from more detailed explanation and examples to make it more comprehensive and insightful.

Rating: 3/5

Interview Question:

How do you manage state in React components?

Candidate's Answer:

So talking about how I managed state in react component, there are four major step.To manage react states so.I'm talking about like first.First step is a local state.It will affect.One or another component.And.The second one is.Global.Global state, Global state affect the multiples components.And the third one is.Server component.Silver state, sorry, so server state.Come with a state.Server integration.And that state.Used in.Our components.And talking about the 4th 1:00.And this is a URL state.Yeah, that's all.

Evaluation:

Your answer is not entirely accurate or clear in explaining how you manage state in React components.

Firstly, you mentioned four steps but only explained three of them clearly. Local state refers to managing state within a single component, global state is managed using tools like Redux or Context API to share state across multiple components, and server state involves fetching data from a server. However, you mentioned URL state without giving a clear explanation.

To improve your answer, you could provide a clearer explanation of each type of state management in React components. For example, explain how URL parameters can be used to manage state in React components, such as using React Router to access parameters passed through the URL.

Overall, your answer lacks clarity and completeness. I would rate it 2/5.

To improve your answer, provide a more detailed explanation of each type of state management, give examples of how each type can be implemented in React components, and ensure that you cover all the steps you mention in your response. Additionally, practice explaining technical concepts in a clear and concise manner to improve your communication skills during interviews.