Multicolor Steels India Interview Questions and Answers

Design patterns are reusable solutions to common software problems.

• Creational patterns: Singleton, Factory, Abstract Factory, Builder

• Structural patterns: Adapter, Bridge, Composite, Decorator, Facade, Flyweight, Proxy

• Behavioral patterns: Chain of Responsibility, Command, Interpreter, Iterator, Mediator, Memento, Observer, State, Strategy, Template Method, Visitor

• We use design patterns to improve code readability, maintainability, and scalability.

• They provide a common language...read more

Promises in JS are objects representing the eventual completion or failure of an asynchronous operation. Async/await is a syntactic sugar for working with promises.

• Promises are used to handle asynchronous operations in JavaScript.

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

• Async/await is a modern way to work with asynchronous code in JavaScript, making it easier to read and write.

• Async functions return a promise, allowing you to use the await keyword t...read more

Closure in JavaScript allows a function to access variables from its outer scope even after the outer function has finished executing.

• Closure is created when a function is defined within another function and the inner function references variables from the outer function.

• The inner function maintains a reference to the outer function's scope, allowing it to access those variables even after the outer function has returned.

• Closures are commonly used in event handlers, callbacks...read more

Explanation of CSS specificity hierarchy

• Inline styles have the highest specificity

• IDs have higher specificity than classes and elements

• Multiple selectors with the same specificity are resolved by the order in which they appear in the stylesheet

• The universal selector (*) has the lowest specificity

Clone a Todo Application UI using ReactJS, Sass

• Create a new ReactJS project using create-react-app

• Design the UI using Sass and implement it in ReactJS

• Use state and props to manage the todo list

• Add functionality to add, delete and mark tasks as complete

• Implement local storage to persist data

• Test the application thoroughly