Kidvento Education & Research Front end Developer Interview Questions and Answers

Lazy loading is a technique used in web development to defer loading of non-essential resources until they are needed.

• Lazy loading helps improve page load times by only loading resources when they are required.

• It is commonly used for images, videos, and other media files on websites.

• Lazy loading can be implemented using JavaScript libraries or frameworks like Intersection Observer API.

useMemo is used to memoize a value, while useCallback is used to memoize a function.

• useMemo is used to memoize a value and recompute it only when its dependencies change.

• useCallback is used to memoize a function and recompute it only when its dependencies change.

• useMemo is useful for optimizing performance by avoiding unnecessary re-renders.

• useCallback is useful for optimizing performance by avoiding unnecessary functi...read more

Life cycle methods are special methods provided by React to perform actions at specific points in the component's life cycle.

• componentDidMount() - called after the component is rendered for the first time

• componentDidUpdate(prevProps, prevState) - called after the component updates

• componentWillUnmount() - called before the component is removed from the DOM

I am a passionate front end developer with experience in HTML, CSS, and JavaScript.

• Experienced in building responsive web applications

• Proficient in using front end frameworks like React and Angular

• Skilled in optimizing website performance for speed and efficiency