ICICI Lombard General Insurance Company Interview Questions and Answers

Hooks are a feature in React that allow for stateful logic to be used in functional components.

• Hooks allow for reusable logic to be extracted from components

• They simplify code and reduce the need for class components

• useState hook allows for state management in functional components

• useEffect hook allows for side effects to be performed in functional components

• useContext hook allows for easy access to context in functional components

Components can be created as classes or functions in React JS.

• Class components are created using ES6 classes and have a state and lifecycle methods.

• Function components are created using functions and do not have a state or lifecycle methods.

• Hooks can be used in function components to add state and lifecycle functionality.

• Components can be reused throughout the application.

• Examples: Class component - class MyComponent extends React.Component {} Function component - function My...read more

Yes, I have experience in coding optimization to improve performance and efficiency.

• Identifying and removing unnecessary code or dependencies

• Minifying and compressing code for faster loading times

• Using efficient algorithms and data structures

• Reducing the number of API calls by batching requests

• Implementing lazy loading for resources to improve page load times

Debugger in JavaScript is used for pausing the execution of code to inspect variables, check the flow of the program, and debug errors.

• Debugger helps in identifying and fixing bugs in the code.

• It allows developers to step through code line by line to understand the flow of execution.

• Developers can inspect variables and their values at different points in the code.

• By setting breakpoints, developers can pause the code at specific locations to analyze the state of the applicatio...read more

Conditional rendering in React allows components to render different elements or components based on certain conditions.

• Use ternary operator to conditionally render elements

• Use logical && operator for conditional rendering

• Use if-else statements inside render method for more complex conditions

Arrow functions are a concise way to write functions in JavaScript.

• Arrow functions do not have their own 'this' keyword.

• Arrow functions are more concise than traditional function expressions.

• Arrow functions do not have their own 'arguments' object.

• Arrow functions are best suited for non-method functions.

• Example: const add = (a, b) => a + b;

Lazy loading is a technique used in web development to defer loading non-essential resources until they are needed.

• Lazy loading helps improve page load times by only loading resources when they are required.

• It is commonly used for images, videos, and other media files on websites.

• Lazy loading can be implemented using libraries like React.lazy() in React.js.

JSX is a syntax extension for JavaScript that allows HTML to be written in React components. ES6 is a newer version of JavaScript with additional features.

• JSX allows developers to write HTML-like code within JavaScript files

• ES6 introduces new syntax and features like arrow functions, classes, and template literals

• JSX is transformed into regular JavaScript by tools like Babel before being rendered in the browser