Quiz will ask 20 randomly selected questions with allotted time of . You can take the quiz more than once. Once you submit the quiz, you can review how you have done, the correct the answers for each questions and the explanation for the correct the answer.
12 Modules
What is the primary purpose of React's virtual DOM?
To improve performance by minimizing direct manipulation of the actual DOM.
To provide a way to manage state in functional components.
To allow for server-side rendering of components.
To enable the use of JSX syntax.
Which of the following are valid lifecycle methods in class components?
componentDidMount
render
componentWillUpdate
useEffect
What is the purpose of keys in React lists?
To uniquely identify elements in a list for efficient updates.
To control the order of elements in the DOM.
To provide a way to style individual elements.
To enable animations on list items.
Which of the following statements about props is true?
Props are mutable and can be changed by the component.
Props are passed from parent components to child components.
Props can be used to manage local component state.
Props can be any data type, including functions.
What is the significance of the 'key' prop in React?
It helps React identify which items have changed, are added, or are removed.
It is required for all components to function correctly.
It allows for the creation of controlled components.
It is used to define the default state of a component.
12 Modules