React Concepts and Best Practices

This video is a comprehensive React crash course for beginners, covering core concepts like components, state, and props. It guides viewers through building a task tracker app, demonstrating the use of React hooks, styling, and event handling. The course also explores advanced features, backend integration using JSON server, and routing with React Router.

What is React primarily used for?

• Creating user interfaces

• Building server-side applications

• Developing mobile apps

• Managing databases

Which of the following is NOT part of the MERN stack?

• Express

• MongoDB

• Python

• React

What is the purpose of the 'index.js' file in a React project?

• To style the application

• To import and render the root component

• To manage database connections

• To define the main HTML structure

How can you ensure a prop is a specific type in React?

• Using lifecycle methods

• Using state management

• Using prop types

• Using default props

What is the correct way to apply a background color in React using inline styles?

• bgColor: 'red'

• background: 'red'

• backgroundColor: 'red'

• background-color: 'red'

Which of the following is a benefit of creating reusable components in React?

• They allow for consistent styling across the application

• They increase the complexity of the code

• They reduce the need for CSS

• They make the application slower

How can you ensure that a list of items in React has unique keys?

• Use a random number as the key

• Use the index of the array as the key

• Use the same key for all items

• Use a unique property from the item, like an ID

What is the purpose of the 'onSubmit' function in the task form?

• To delete the task from the list

• To automatically save the task without user interaction

• To validate the input and prevent default form submission

• To directly submit the form to a server

How does the application ensure that the task form is initially hidden?

• By setting the form's display property to none

• By removing the form component from the DOM

• By using a state variable initialized to false

• By setting a CSS property to hide the form

What is the role of JSON Server in the application?

• To handle user authentication and authorization

• To serve static files to the client

• To create a mock REST API for testing purposes

• To provide a real-time database for the application