Eonlint Full Stack Developer Interview Questions and Answers

Q1. Tell me about your self?
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Q1. Basic Qualification
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Q2. Reasons for job change
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I'm seeking new challenges, opportunities for growth, and a better alignment with my career goals and values.
• Desire for professional growth: I'm looking for a role that offers more opportunities for learning and advancement.

• Alignment with career goals: My current position doesn't fully align with my long-term career aspirations in software development.

• Seeking a better work culture: I want to be part of a team that valu...read more
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Q1. Virtual Dom vs Real Dom
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Virtual Dom is a lightweight copy of the Real Dom, used for efficient updates in web development.
• Virtual Dom is a lightweight copy of the Real Dom, used for efficient updates in web development.

• Real Dom represents the actual structure of the web page, while Virtual Dom is a simplified version stored in memory.

• Changes made to the Virtual Dom are compared with the Real Dom to determine the minimum number of updates neede...read more
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Q2. React Hooks flow
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Q1. What do you mean by Zustand? Explain the difference between client-side rendering and server-side rendering. How would you write optimized code for SEO in Next.js? Explain the architecture of a Parking Man...read more
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Zustand is a small, fast state management tool for React, enabling easy global state management without boilerplate code.
• Lightweight: Zustand has a minimal API and is easy to integrate into existing React applications without significant overhead.

• Global State Management: It allows for centralized state management, making it easier to share state across components without prop drilling.

• Hooks-Based: Zustand uses React ho...read more
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Q2. Overall Experience is nice.
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Q1. What are middlewares?
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Q2. Project Details
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A simple web application of To-Do list using react.js/vue.js technology

Q1. Basic to mid level html QnA.
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Q2. Basic css3 QnA and few simple task usnig css3.
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Q3. Few JS basic QnA and simple arr/obj method coding task
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Q4. React.js/vue.js QnA and few simple task to perform using JS Lib/frame.
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Q1. Started with self intro then ask about education, gaps and skills asked me show my major project and explain to him(he continuously asked qs on my project)
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Q2. 2-3 situational based qs
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Small assignment to build simple App.

Q1. JavaScript Questions
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Q2. Reactjs Questions
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Q1. What is React.js, and how is it used in web development?
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React.js is a JavaScript library for building user interfaces, particularly single-page applications, using a component-based architecture.
• Component-Based: React allows developers to build encapsulated components that manage their own state, making code reusable and easier to maintain.

• Virtual DOM: React uses a virtual DOM to optimize rendering, updating only the parts of the UI that have changed, which enhances perform...read more
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Q2. What is Next.js and what are its key features?
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Next.js is a React framework for building server-side rendered and static web applications with ease.
• Server-Side Rendering (SSR): Automatically renders pages on the server for better SEO and performance.

• Static Site Generation (SSG): Pre-renders pages at build time, improving load times (e.g., blog posts).

• API Routes: Allows building API endpoints within the application (e.g., /api/users).

• File-Based Routing: Simplifies r...read more
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Q1. What are hooks, and what are their different types?
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Hooks are functions that let you use state and lifecycle features in React functional components.
• useState: Allows you to add state to functional components. Example: const [count, setCount] = useState(0);

• useEffect: Lets you perform side effects in function components. Example: useEffect(() => { document.title = `Count: ${count}`; }, [count]);

• useContext: Provides a way to share values between components without passi...read more
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Q2. What are the frameworks of React?
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React itself is a library, but it can be used with various frameworks and tools to enhance development.
• Next.js: A framework for server-rendered React applications, enabling features like static site generation and API routes.

• Gatsby: A static site generator that uses React, optimized for performance and SEO, ideal for building fast websites.

• React Router: A standard library for routing in React applications, allowing nav...read more
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Q3. What is React?
Ans. 
React is a popular JavaScript library for building user interfaces, particularly single-page applications, using a component-based architecture.
• Component-Based: React allows developers to build encapsulated components that manage their own state, making code reusable and easier to maintain.

• Virtual DOM: React uses a virtual representation of the DOM to optimize rendering, improving performance by minimizing direct updat...read more
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Q4. What is lifecycle methods?
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Lifecycle methods are hooks in component-based frameworks that manage the component's lifecycle events.
• Lifecycle methods allow developers to run code at specific points in a component's life, such as mounting, updating, and unmounting.

• In React, common lifecycle methods include componentDidMount, componentDidUpdate, and componentWillUnmount.

• Example: componentDidMount is called after a component is added to the DOM, usef...read more
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Q5. What is Tailwind css?
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Tailwind CSS is a utility-first CSS framework for creating custom designs without leaving your HTML.
• Utility-first approach: Tailwind provides low-level utility classes like 'flex', 'pt-4', 'text-center' to build designs directly in HTML.

• Customization: Easily customize your design system using the 'tailwind.config.js' file to define colors, spacing, and more.

• Responsive design: Tailwind includes responsive utilities, all...read more
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