- Software Engineer, Product
- Modern Technology stacks:
- React Basics:
- Component Lifecycle:
- Performance Optimization:
- React Router:
- State Management:
- CSS-in-JS and Styling: t
- Testing React app:
- Build React App With Java Backend
- Connecting React-Frontend and NodeJS/Express Backend Applications
- API Integration:
- Security Considerations:
- Code Quality & Best Practices:
- Behavioral Questions and Problem-Solving:
- Teamwork and Collaboration:
- Project Management and Deadlines:
- Adaptability:
- Culture Fit:
- Company-Specific Questions:
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Full-Stack Web App with React,Node.js,Express
Full Stack Development Questions and Anwsers
Performance Optimization:
1- Can you walk us through the lifecycle methods of a class-based component in React?
How do they compare to the hook-based lifecycle (e.g., useEffect)
While class components offer a structured approach suitable for complex applications,
React Hooks provide a more flexible and concise way to build components,
especially when dealing with state and side effects in UI logic.
Key Differences between React Hooks and Class Components
The distinction between React Hooks and class components lies in their approach to component creation and state management. Traditional patterns like higher order components and render props were used to share logic across components but often introduced complexity and excessive nesting.
Class components rely on lifecycle methods for executing code at specific times, whereas React Hooks use functions like useEffect to achieve similar outcomes with less boilerplate. Additionally, React Hooks promote code reusability through custom hooks, enabling developers to extract component logic into reusable functions.
Key Differences between React Hooks and Class Components
The distinction between React Hooks and class components lies in their approach to component creation and state management. Traditional patterns like higher order components and render props were used to share logic across components but often introduced complexity and excessive nesting.
Class components rely on lifecycle methods for executing code at specific times, whereas React Hooks use functions like useEffect to achieve similar outcomes with less boilerplate. Additionally, React Hooks promote code reusability through custom hooks, enabling developers to extract component logic into reusable functions.
2- How does the useEffect hook work in functional components?
Can you explain the dependencies array?
React Hooks have revolutionized how we write and manage state in functional components.
One of the most commonly used hooks is the useEffect hook .
The useEffect hook allows us to perform side effects in functional components.
Side effects could be data fetching, subscriptions, or manually changing the DOM..
The useEffect hook accepts two arguments: a callback function and an array of dependencies. The side effect logic is contained in the callback function, and the useEffect dependency array is an optional array of state and props on which the effect depends.
The dependency array in the useEffect hook is a powerful feature that controls when the effect should run. It is an array of values that the effect depends on. If one of these values changes between renders, React will re-run the effect. If the values have not changed, React will skip the effect.
The dependency array can include state variables, props, or any other value from the component scope. It is essential to have all the variables the effect uses and could change over time. This is because the useEffect callback function captures the values from the component scope at the time of the initial render and does not have access to the updated values in subsequent renders.
One of the most commonly used hooks is the useEffect hook .
The useEffect hook allows us to perform side effects in functional components.
Side effects could be data fetching, subscriptions, or manually changing the DOM..
The useEffect hook accepts two arguments: a callback function and an array of dependencies. The side effect logic is contained in the callback function, and the useEffect dependency array is an optional array of state and props on which the effect depends.
The dependency array in the useEffect hook is a powerful feature that controls when the effect should run. It is an array of values that the effect depends on. If one of these values changes between renders, React will re-run the effect. If the values have not changed, React will skip the effect.
The dependency array can include state variables, props, or any other value from the component scope. It is essential to have all the variables the effect uses and could change over time. This is because the useEffect callback function captures the values from the component scope at the time of the initial render and does not have access to the updated values in subsequent renders.
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