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01 Jan 1970 05:30 AM
What are React Hooks Rules of Hooks, and why is it important to follow them?
A
They are guidelines for writing performant code
B
Rules that enforce proper handling of asynchronous operations
C
Guidelines for using hooks like useState and useEffect to ensure they are called in the correct order and only in functional components
D
Rules that dictate the usage of hooks in class components
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2 followers
01 Jan 1970 05:30 AM
Describe the concept of code splitting in React and its benefits.
A
Breaking the code into smaller, manageable pieces to improve maintainability
B
Dynamically loading only the necessary parts of the application, reducing initial load times
C
Using higher-order components to modularize code
D
Improving code readability through proper indentation and naming conventions
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2 followers
01 Jan 1970 05:30 AM
How does React handle and optimize the rendering of lists of dynamic data?
A
By using the map function exclusively
B
Utilizing the shouldComponentUpdate method
C
Through the use of the key prop to uniquely identify list items
D
By relying on the Virtual DOM to automatically optimize list rendering
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2 followers
01 Jan 1970 05:30 AM
What is the significance of React's context API, and in what scenarios would you prefer using it?
A
Context API is used for creating global variables accessible throughout the application
B
It facilitates the sharing of state between components without prop drilling
C
Context API is exclusively for managing component styling
D
It is used for handling asynchronous operations in functional components
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2 followers
01 Jan 1970 05:30 AM
Explain the concept of "lifting state up" in React and provide an example scenario where it's beneficial.
A
Moving state management to the top-level component for sharing state between sibling components
B
Elevating components within the component hierarchy
C
Enhancing the performance of a specific component
D
Utilizing context API for managing global state
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2 followers
01 Jan 1970 05:30 AM
What is the role of the useRef hook in React, and in what scenarios is it commonly used?
A
Managing component state in functional components
B
Creating references to DOM elements and persisting values between renders
C
Handling asynchronous operations with ease
D
Facilitating client-side routing
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52
2 followers
01 Jan 1970 05:30 AM
How does server-side rendering (SSR) benefit React applications, and what challenges does it address?
A
Improves initial page load performance and SEO, mitigates the "flash of unstyled content" (FOUC) issue
B
Enhances client-side routing efficiency
C
Accelerates the execution of asynchronous operations
D
Facilitates better component styling
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2 followers
01 Jan 1970 05:30 AM
What is the significance of React Hooks like useImperativeHandle and useLayoutEffect?
A
Managing component layout and rendering
B
Synchronizing imperative code with React state
C
Creating custom render methods for components
D
Optimizing performance for asynchronous tasks
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2 followers
01 Jan 1970 05:30 AM
Explain the concept of Higher-Order Components (HOCs) in React.
A
Components that render other components
B
Components that receive and return other components
C
Components used for handling state in functional components
D
Components responsible for server-side rendering
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2 followers
01 Jan 1970 05:30 AM
What is the purpose of the useCallback hook in React?
A
Optimizing performance by memoizing callback functions
B
Managing global state in functional components
C
Creating reusable custom hooks
D
Handling asynchronous operations in components
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2 followers
01 Jan 1970 05:30 AM
What is the purpose of React Hooks like useReducer and useContext?
A
To manage component styling
B
To facilitate client-side routing
C
To handle complex state logic in functional components
D
To manage asynchronous operations
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2 followers
01 Jan 1970 05:30 AM
How does error boundaries work in React?
A
They prevent all errors in the application
B
They catch JavaScript errors anywhere in the component tree and log those errors
C
They only work with class components
D
They handle only asynchronous errors
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2 followers
01 Jan 1970 05:30 AM
What is the purpose of the useMemo hook in React?
A
Memoizing function results for performance optimization
B
Managing component side effects
D
Creating memoized components
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52
2 followers
01 Jan 1970 05:30 AM
How does React handle forms, and what is controlled components?
A
React forms use traditional HTML form handling
B
Controlled components are components that manage their own state
C
React forms use one-way data binding
D
Controlled components are components whose form elements are controlled by React state
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2 followers
01 Jan 1970 05:30 AM
What is the significance of the React.Fragment in React?
A
A state management library
B
A wrapper for functional components
C
A placeholder for async operations
D
A wrapper to group multiple elements without adding an extra node to the DOM
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2 followers
01 Jan 1970 05:30 AM
What is the purpose of the map function in React when rendering lists of components?
B
Iterating over array elements and rendering components
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2 followers
01 Jan 1970 05:30 AM
What is Redux used for in a React application?
C
Handling asynchronous operations
D
State management in a predictable way
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2 followers
01 Jan 1970 05:30 AM
How does React Router help in navigation within a React application?
A
By creating hyperlinks between components
B
Enabling server-side rendering
C
Facilitating client-side routing
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2 followers
01 Jan 1970 05:30 AM
In React, what is the key role of the shouldComponentUpdate lifecycle method?
A
Handling component initialization
B
Controlling whether a component should re-render
C
Managing asynchronous operations
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Software Developer
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2 followers
01 Jan 1970 05:30 AM
What is the purpose of the useEffect hook in React?
B
Performing side effects in functional components
D
Controlling rendering logic
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