ReactJS

ReactJS - Events

⛪ Computer Science and Engineering > ReactJS

Test your knowledge of ReactJS Events with our interactive and challenging MCQ (Multiple Choice Questions) quiz. Covering topics such as handling events, synthetic events, event pooling, and event delegation, our quiz is designed to help you improve your understanding of ReactJS Events and prepare for interviews or exams.

Q 1: In JSX, ______________ are passed as event handlers.

  • A Strings
  • B Events
  • C Actions
  • D Handles

Q 2: React uses _____________ syntax.

  • A Uppercase
  • B Lowercase
  • C Camelcase
  • D All the options

Q 3: Lifecycle methods are mainly used ___________.

  • A To freeup resources
  • B To enhance components
  • C To keep track of event history
  • D None of the options

Q 4: Which of the following is invoked once, only on the client, after rendering occurs?

  • A componentDidMount
  • B componentWillMount
  • C componentWillUnmount
  • D shouldComponentUpdate

Q 5: We can declare special methods on the component class to run some code when a component mounts and unmounts.

  • A True
  • B False

Q 6: Event handling in React is similar to Event handling in DOM.

  • A True
  • B False

Q 7: How can we prevent default behavior in React?

  • A None of the options
  • B Using avoidDefault()
  • C Using revokeDefault()
  • D Using preventDefault()