Lead Front End Developer

Lead Front End Developer Interview Questions and Answers

Updated 12 Jun 2024

Q1. Can you explain React Higher Order Component to a 5 year old

Ans.

Higher Order Component is like a magic spell that can make any component do special things.

  • HOC is a function that takes a component and returns a new component with added functionality

  • It's like adding a superpower to a regular component

  • For example, a HOC can add authentication or data fetching capabilities to a component

Q2. Why would you use React class component over functional component

Ans.

Class components have access to lifecycle methods and state, while functional components are simpler and more lightweight.

  • Class components have access to lifecycle methods such as componentDidMount, componentDidUpdate, componentWillUnmount, etc.

  • Class components have the ability to hold and manage local component state.

  • Functional components are simpler, more lightweight, and easier to read and test.

  • Functional components can utilize React Hooks for state management and side eff...read more

Q3. Design a Todo system in React

Ans.

A Todo system in React for managing tasks and deadlines

  • Use React state to manage the list of tasks

  • Create components for adding, editing, and deleting tasks

  • Implement functionality for marking tasks as completed

  • Include a filter option for viewing completed and pending tasks

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