30 Questions
What is the purpose of the useReducer hook in the provided code?
To handle complex state management in a shopping cart application
What is the purpose of the useMemo hook mentioned in the text?
To optimize the performance of the component by memoizing expensive computations
What is the purpose of the InitialState object in the provided code?
It defines the initial state of the counter component
What is the purpose of the reducer function in the provided code?
To handle the state updates for the counter component
What is the purpose of the dispatch function in the provided code?
To trigger the Increment and decrement actions on the counter component's state
What is the difference between using useState and useReducer for state management in React?
useState is better for simple state management, while useReducer is better for complex state management
What are the Native Components in React Native?
React components invoked with JavaScript
Which core components are available in React Native?
Ready-to-use Native Components
What type of container does the Android View Component represent in React Native?
Non-scrolling container
What functionality does the iOS View Component offer in React Native?
Styling and nesting strings of text, handling touch events, and more
What is the purpose of the ScrollView component in React Native?
Creating a generic scrolling container
What can the TextInput component in React Native be used for?
Allowing the user to enter text
What is the main purpose of using the useMemo hook?
To memoize functions for performance optimization
In the provided code snippet, what does the 'processedData' variable store?
Randomly generated numbers sorted in ascending order
How does the useCallback hook differ from the useMemo hook?
useCallback is used for memoizing functions, while useMemo is used for state management.
What role does the 'toggleDarkMode' function play in the useContext setup?
It toggles between dark and light modes
Why is it beneficial to use the useMemo hook for costly computations?
To minimize unnecessary recalculations and optimize performance
What would happen if the dependencies array in a useCallback function was left empty?
The function would create closures with stale data
In the given code snippet, what is the purpose of the 'Header' component?
To display the text 'Hello Style!'
What does ReactDOM.createRoot() method do in the provided code snippet?
Defines the root element for React rendering
How should inline styles be applied to elements in React components?
Nesting styles within double curly braces {{...}}
What is the correct way to access an HTML element with the id 'root' in the given code?
document.getElementById('root')
What is the significance of enclosing JavaScript expressions in curly braces within JSX?
To evaluate the expression and return its value
Why are double curly braces {{...}} used for styling elements in React?
To handle nested styles
What is the main advantage of using the Fetch API over other data fetching methods?
It is built-in to modern browsers and does not require additional dependencies
What is the purpose of the useEffect hook in the DataFetching component?
To fetch a new quote only when the component is first rendered
What is the purpose of the fetchQuote function in the DataFetching component?
To fetch a new quote from the dummyjson.com/quotes/random API
How does the DataFetching component handle the loading state of the data?
It sets the isLoading state variable to true while the data is being fetched and false when the data is ready
What is the purpose of the useState hook in the DataFetching component?
To manage the state of the quote and isLoading variables
What is the purpose of the quote object in the DataFetching component?
To store the fetched quote and author information
Learn how to use the useReducer hook in React with TypeScript. This quiz covers initializing state, defining a reducer function, and dispatching actions to update state values.
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