L&T Technology Services Reactjs Developer Interview Questions and Answers

Q1. 1. Fetch data from api and display in UI list format
Ans. 
Answering how to fetch data from API and display in UI list format for Reactjs Developer interview.
• Use fetch or axios to fetch data from API

• Store the data in state or Redux store

• Map through the data and display in UI list format

• Handle loading and error states

• Example: fetch('https://api.example.com/data').then(response => response.json()).then(data => setData(data))

• Example: {data.map(item =>

• {item.name...read more
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Q2. Every possible question related to reactjs
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Q1. Sematic elements in HTML? What is Sass, SCSS, LESS and more about CSS? Design a HTML form? Test cases in javascript How you will implement security on a banking website.
Ans. 
Semantic elements in HTML are used to give meaning to the content, making it more accessible and SEO-friendly.
• Semantic elements like <header>, <footer>, <nav>, <article>, <section>, <aside>, <main>, <figure>, <figcaption>, <details>, <summary>, etc., provide structure and meaning to the content.

• They help search engines understand the content better, impr...read more
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Q1. ES6 features, let var const, closures
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Q2. React coding question counter
Ans. 
Create a simple counter component in React that increments and decrements a value.
• Use useState to manage the counter state: const [count, setCount] = useState(0);

• Create buttons for incrementing and decrementing the count: <button onClick={() => setCount(count + 1)}>Increment</button>

• Display the current count: <p>Current Count: {count}</p>

• Ensure to handle edge cases, like preventing negative c...read more
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Write a program in vanila js to fetch api data and show in dropdow after select it should call api for perticular data and also should cache value of if it is recent api call happen

Q1. Unit Testing Questions Asked
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Q1. What next after npm build
Ans. 
After running npm build, the next step is to deploy the built application to a web server or hosting platform.
• Upload the build files to a web server or hosting platform

• Configure the server to serve the build files

• Test the deployed application to ensure it is working correctly
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Its a 90 minutes aptitude round. It's having 3 sections :
1 - Logical and Anlytical reasoning
2 - Related to your Skills and the position for which you have applied. For me it was completly on React.
3 - Code Ground, where you have to showcase your coding skills.

Q1. There were programming questions and chose the correct output kind of questions.
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