20 ReactJS Fundamental Questions for Beginners, which cover basics of ReactJS
Here are 20 fundamental questions for beginners in ReactJS:
Explain the concept of a virtual DOM in React.
How do you create a new React application using Create React App?
Components and JSX:
What is a React component, and how do you create one?
Explain the purpose of JSX in React.
How do you render a component in React?
Props and State:
What are props in React, and how are they used to pass data between components?
Describe the difference between states and props in a React component.
How do you update the state of a component in React?
List and explain the main phases of the React component lifecycle.
How can you perform side effects in a React component using lifecycle methods?
How do you handle events in React?
Explain the importance of binding for event handlers.
How can you conditionally render components in React?
What is the purpose of the ternary operator in conditional rendering?
Lists and Keys:
How do you render a list of elements in React?
Explain the significance of keys when rendering lists in React.
Forms in React:
How do you handle form inputs and form submissions in React?
What is controlled and uncontrolled components in React forms?
- What is React Router, and how do you implement client-side routing in a React application?
These questions cover the basics of ReactJS, including components, props, state, lifecycle, events, conditional rendering, lists, keys, forms, and React Router. They serve as a foundation for understanding React and building more complex applications.