The Ultimate Knowledge Hub
Written by adminstudyvarsity
Best Cyber Security Tips Here are the most effective and realistic cybersecurity tips to protect yourself in both personal and professional digital life, based on 15 years of field experience: ? 1. Use a Password Manager Create unique, complex passwords for every account. Let a reputable password manager (e.g., Bitwarden, 1Password) generate and store them […]
Written by adminstudyvarsity
React.js & Next.js React.js & Next.js Interview Questions and Answers Section 1: React Core Concepts 1. What is JSX? Answer: JSX (JavaScript XML) is a syntax extension for JavaScript used with React to describe UI elements. const element = <h1>Hello, world!</h1>; JSX gets transpiled to React.createElement calls. 2. Explain Virtual DOM. Answer: Virtual DOM is […]
Written by adminstudyvarsity
TYPESCRIPT TYPESCRIPT Interview Questions and Answers What is TypeScript? TypeScript is an open-source language developed by Microsoft that builds on JavaScript by adding static type definitions. These types provide a way to describe the shape of objects, providing better documentation and allowing TypeScript to validate your code. It helps catch errors early through a type […]
Written by adminstudyvarsity
JAVASCRIPT JAVASCRIPT Interview Questions and Answers Basics and Core Concepts What are JavaScript data types? JavaScript has 7 primitive data types: undefined, null, boolean, number, string, symbol, and bigint. Objects are non-primitive data types. js// Primitive let name = “Ram”; // String let age = 25; // Number let isOnline = true; // Boolean let […]
Written by adminstudyvarsity
MERN STACK Mern Stack Interview Questions and Answers SECTION 1: JavaScript & ES6+ Fundamentals (10 Questions) What is the difference between let, const, and var? var is function-scoped, hoisted with undefined. let and const are block-scoped. let allows reassignment; const does not. Use const by default, let when reassignment is required. Explain closures in JavaScript. […]
