Capgemini Engineering React Js Frontend Developer Interview Questions, Process, and Tips

A closure is a function that has access to its own scope, as well as the scope in which it was defined.

• A closure allows a function to access variables from an outer function even after the outer function has finished executing.

• Closures are commonly used in event handlers, callbacks, and in functional programming.

• Example: const outerFunction = () => { const outerVar = 'I am outer'; return () => { console.log(outer...read more

State is mutable and managed within a component, while props are immutable and passed from parent to child components.

• State is managed within a component and can be changed using setState() method

• Props are passed from parent to child components and cannot be changed within the child component

• State is used for internal component data management, while props are used for passing data from parent to child components

• Exampl...read more

display block takes up full width and starts on a new line, while display inline only takes up as much width as necessary and does not start on a new line.

• display block elements start on a new line and take up the full width available, while display inline elements do not start on a new line and only take up as much width as necessary

• display block elements can have margin and padding applied on all four sides, while di...read more

A promise is an object representing the eventual completion or failure of an asynchronous operation.

• Promises are used to handle asynchronous operations in JavaScript.

• A promise can be in one of three states: pending, fulfilled, or rejected.

• Promises can be chained using .then() to handle success and .catch() to handle errors.

• Example: Fetching data from an API returns a promise that resolves with the data or rejects with