Intello Labs Pvt Ltd Interview Questions and Answers

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 properly nested within elements.

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

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

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

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'); }