Sekel Technologies Front end Developer Interview Questions and Answers

Q1. What are hooks, and what are their different types?
Ans. 
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?
Ans. 
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?
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Q4. What is lifecycle methods?
Ans. 
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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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?
Ans. 
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?
Ans. 
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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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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