Whether you are preparing for a junior frontend role or a staff-level engineer position, mastering these topics will give you a distinct competitive edge. 1. JavaScript Execution Context and Call Stack
: Named vs. anonymous functions, arrow functions, callback functions, and higher-order functions. happy rawat javascript interview questions pdf free best
The JavaScript Interview Masterclass curriculum is meticulously organized into beginner, intermediate, and advanced levels to ensure no gaps in your knowledge. 1. JavaScript Fundamentals Whether you are preparing for a junior frontend
You can't build a house on a weak foundation. This section ensures you have a rock-solid grasp of the basics, starting with the very first question: JavaScript Fundamentals You can't build a house on
Which do you use? (React, Angular, or Vue?)
: Block-scoped, not hoisted (Temporal Dead Zone), cannot be re-declared. : Block-scoped, immutable binding (cannot reassign). What are the data types?
Array.prototype.myMap = function(callback) const resultArray = []; for (let i = 0; i < this.length; i++) // 'this' refers to the array the method is called on if (this.hasOwnProperty(i)) resultArray.push(callback(this[i], i, this)); return resultArray; ; // Usage Example: const numbers = [1, 2, 3]; const doubled = numbers.myMap(num => num * 2); console.log(doubled); // [2, 4, 6] Use code with caution. Problem 2: Implement a Debounce Function