Intermediate Front-End Development with React

Question 1
In React, which lifecycle method is most appropriate for initiating API calls after a component has been rendered?

(A) componentDidMount

(B) componentWillReceiveProps

(C) shouldComponentUpdate

(D) componentWillMount

Question 2
What is the recommended approach for managing shared state across deeply nested React components?

(A) Using the React Context API

(B) Using prop drilling

(C) Setting state individually in each component

(D) Storing state in global variables

Question 3
Which advantage do function components with hooks offer compared to traditional class components?

(A) They blend class-based syntax with hooks for automatic event binding

(B) They eliminate the need for any state management

(C) They rely on class inheritance for organizing components

(D) They allow the use of state and lifecycle features without writing a class

Question 4
What does 'reconciliation' refer to in React's rendering process?

(A) Simultaneous execution of multiple component lifecycles in parallel

(B) The process of comparing the virtual DOM with the previous version to update only the changed elements

(C) A strategy for persisting state data between browser sessions

(D) Merging state values between parent and child components

Question 5
What is the primary purpose of the shouldComponentUpdate method in class components?

(A) To delay rendering until all child components have completed updating

(B) To force a re-render regardless of state or prop changes

(C) To create a backup of the current state before updates

(D) To determine whether a component should re-render in response to changes in props or state

Question 6
How does a controlled component differ from an uncontrolled component in React forms?

(A) A controlled component lets the browser handle data without intervention

(B) A controlled component manages state asynchronously while leaving UI updates to the browser

(C) A controlled component stores its data directly in the DOM

(D) A controlled component's form data is managed by React state

Question 7
In a React application with a large list, which performance optimization strategy is most advisable?

(A) Rendering all list items at once

(B) Implementing list virtualization

(C) Using traditional pagination without virtualization

(D) Applying inline styles to each list item

Question 8
Within React application architecture, what is the role of a container component?

(A) To manage state and business logic while passing data to presentational components

(B) To serve solely as a styled wrapper without handling data

(C) To render static content without any interaction

(D) To fetch data on every render without managing any internal state

Question 9
Which technique is best for memoizing React component outputs to avoid unnecessary re-renders?

(A) Utilizing shouldComponentUpdate for memoization

(B) Using setState to force updates

(C) Using React.memo to wrap functional components

(D) Relying solely on componentDidUpdate for optimization

Question 10
How have hooks impacted the reusability of logic in React applications?

(A) They enable developers to share logic via custom hooks without altering the component hierarchy

(B) They offer a one-size-fits-all state container that diminishes flexibility

(C) They force the use of class components for complex logic

(D) They limit reusability by tightly coupling logic with the UI

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