Wipro Reactjs Developer Interview Questions, Process, and Tips

Context API or Redux can be used as alternative ways for prop drilling in React.

• Use Context API to pass data down the component tree without having to manually pass props at every level.

• Implement Redux to manage global state and access data from any component without prop drilling.

• Consider using React's useContext hook with Context API for a simpler way to consume context in functional components.

Pure components, memo, useCallback, and HoC are optimization techniques in React for improving performance.

• Pure components are components that only re-render when their props or state change.

• memo is a higher order component that memoizes the result of a component rendering, preventing unnecessary re-renders.

• useCallback is a hook that memoizes functions, preventing unnecessary re-creations on re-renders.

• HoC (Higher Orde...read more

Closure is a feature in JavaScript that allows a function to access variables in its outer scope.

• A closure is created when a function is defined inside another function.

• The inner function has access to the outer function's variables and parameters.

• The outer function's variables and parameters are not accessible from outside the closure.

• Closures can be used to create private variables and methods.

• Example: function outer...read more

ES6 features are new additions to JavaScript language syntax and functionality.

• Arrow functions

• Template literals

• Let and const keywords

• Destructuring assignment

• Spread and rest operators

• Classes

• Modules

• Promises

• Default parameters

• Object.assign()

• Symbol data type