Kofuku Idea Labs Front end Developer Interview Questions, Process, and Tips

Q1. Tell me about your self
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Q2. What are the html containers
Ans. 
HTML containers are elements used to group and structure content on a webpage.
• Div - generic container element

• Span - inline container element

• Section - groups related content

• Header - contains introductory content

• Footer - contains footer content
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Q3. What is eventloop
Ans. 
Event loop is a mechanism in JavaScript that allows for asynchronous operations to be executed in a non-blocking way.
• Event loop is responsible for handling asynchronous operations in JavaScript.

• It allows for non-blocking execution of code by moving asynchronous tasks to the background and executing them when ready.

• Event loop continuously checks the call stack and the callback queue to see if there are any tasks that ne...read more
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Q4. How async await works
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Async await is a feature in JavaScript that allows for asynchronous code execution in a synchronous manner.
• Async functions return a Promise.

• Await keyword is used to pause the execution of async function until the Promise is settled.

• Async await simplifies asynchronous code and makes it look like synchronous code.

• Example: async function fetchData() { await fetch('https://api.example.com/data'); }
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Q5. What is the difference between html elements and tags
Ans. 
HTML elements are the building blocks of a webpage, while tags are the specific instructions within those elements.
• HTML elements are the basic building blocks of a webpage, such as <div>, <p>, <img>.

• Tags are the specific instructions within elements that define how content should be displayed, such as <h1>, <a>, <strong>.

• Elements can contain one or more tags, and tags must be properl
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Q6. What is the useRef and its usage
Ans. 
useRef is a hook in React that allows for persisting values between renders without causing re-renders.
• Used to access DOM nodes or values that persist between renders

• Does not cause re-renders when the value changes

• Commonly used for managing focus, animations, and integrating with third-party libraries
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Q7. Write a react app for login and verification form with 6 digit otp input
Ans. 
React app for login and verification form with 6 digit OTP input
• Create a login form with email/username and password fields

• Implement OTP verification with a 6 digit input field

• Use React state to manage form data and OTP input

• Utilize a library like react-otp-input for the OTP input field

• Include validation for the email/username, password, and OTP input

• Display success message upon successful verification
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Create a react app using redux in which you have to add user, we should be able to see all the added user user should be selected and current user should be able to send message to already existed users user should be able to send message to online users only