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Mastering Interceptors and Auth Guards in JavaScript & React
Interceptors and auth guards are two of the most frequently asked interview questions.
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Explore all our deep-dives, interview questions, and tutorials.
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Building a Async Concurrency-Controlled Task Manager in JavaScript
In modern web applications, managing asynchronous tasks efficiently is crucial, especially when dealing with tasks that consume resources or depend on external APIs.
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Converting a DOM Object to Real DOM Elements in JavaScript
In many frontend interviews, you may be asked to convert a virtual DOM object into actual DOM elements. This exercise tests your understanding of the DOM
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Logging Access to Object Properties in JavaScript Using Proxy
This Question was asked in ServiceNow interview, it can be solved using the Proxy Design Pattern.
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Implement a Retry Function for a Promise in JavaScript
In many real-world scenarios, especially when making network requests, temporary failures are common.
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Building Star Rating ⭐Component in ReactJS-Interview Question
When preparing for frontend interviews, implementing common UI elements like a Star Rating Component is a frequent question.
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JavaScript Hoisting: A Deep Dive with Code Examples
Understanding JavaScript hoisting is essential for mastering the language and writing efficient, bug-free code. In this article, we will explore what hoisting
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Mastering the Container/Presentational Pattern in React
Design patterns are crucial for building efficient, maintainable, and scalable applications.
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Unlocking the Power of Compound Components Pattern in React
Design patterns are essential for building robust, maintainable, and scalable applications.
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Mastering Controlled Components Design Pattern in React
Design patterns are the cornerstone of building robust, maintainable, and scalable applications.
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Mastering Custom Hooks Design Pattern in React
Design patterns are vital tools for building robust, maintainable, and scalable applications.
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Understanding the Context API Pattern in React
The Context API in React provides a way to pass data through the component tree without having to pass props down manually at every level.
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Understanding the Render Props Pattern in React
Design patterns are essential tools for building robust, maintainable, and scalable applications.
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Higher-Order Components (HOC): Enhancing Components Reusability
Design patterns are essential tools for building robust, maintainable, and scalable applications.
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Prototype Design Pattern: Promoting Prototype Inheritance
Design patterns play a crucial role in building scalable and maintainable applications.
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Observer Design Pattern: The Power of Event Emitter
Understand the Observer design pattern by building a custom Event Emitter in JavaScript. A core pattern for event-driven architecture.
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Factory Design Pattern: Promotes flexibility & scalability
Design patterns are essential tools for building robust, maintainable, and scalable applications. Understanding and effectively utilizing design patterns
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Module Design Pattern: Encapsulation and Reusability in JS
Design patterns are essential tools for building robust, maintainable, and scalable applications.
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Singleton Design Pattern: Ensuring Consistency & Efficiency
Design patterns are essential tools for building robust, maintainable, and scalable applications.
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Exploring JavaScript Symbols: A Deep Dive into Unique Identifiers
JavaScript Symbols are a relatively new and powerful addition to the language, introduced in ECMAScript 2015 (ES6).
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Mastering JavaScript Generator Functions: A Comprehensive Guide
Generator functions are a powerful feature in JavaScript that provide a new way to work with functions and asynchronous programming.
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Understanding JavaScript Closures: The Power of Scoped Functions
Closures are one of the most powerful and often misunderstood features in JavaScript.
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Mastering JavaScript Promises: The Key to Asynchronous Programming
JavaScript promises are a cornerstone of modern web development, enabling efficient handling of asynchronous operations.
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HealthPlix Frontend Interview Experience
In my recent job switch, I got interviewed at many companies, HealthPlix is one of them. The interview lasted around 1 hour.
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Mastering Closures: Building a Calculator in Javascript
Closures are one of the most powerful and often misunderstood features of JavaScript. They allow you to encapsulate state within a function and create private variables
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Dynamic Chat App with Randomized Replies using ReactJS
In my recent job switch, the interviewer asked me to build a Dynamic Chat App with Randomized Replies using ReactJS.
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Creating an Accordion Component using React
In my recent job switch, the interviewer asked me to create an Accordion Component. This is one of the most basic Machine coding questions that you might face
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Building a Nested Comments and Reply Component with React
In my recent job switch, the interviewer asked me to implement Nested Comments and reply functionality in ReactJS.
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Understanding JavaScript Prototypes: The Foundation of Inheritance in JavaScript
Understanding prototypes is essential for mastering JavaScript, as they form the backbone of inheritance and object-oriented programming in this language.
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Creating an Infinite Scroll with FlatList in React Native
Infinite scroll is a popular pattern for displaying large lists of data. It allows users to scroll through data without experiencing the performance issues
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ZebPay Interview Experience
The interview lasted around 1 hour, Questions that were asked in ZebPay were of medium level.
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Pre-order Traversal in a Binary Tree
Step-by-step guide to implementing Pre-order Traversal in a Binary Tree using both recursive and iterative approaches.
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Level Order Traversal of a Binary Tree
Level Order Traversal, also known as Breadth-First Search (BFS) for trees, is a method of traversing a binary tree level by level.
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Counting the Number of Islands in a Grid
Solve the 'Number of Islands' problem using BFS/DFS. A classic coding interview question explained with JavaScript.
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Reversing Words in a String
Learn multiple ways to reverse words in a string in JavaScript, from simple array methods to manual pointers.
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Implementing Merge Sort in JavaScript
Merge Sort is a classic sorting algorithm that uses the divide and conquer paradigm to efficiently sort an array, this is one of the most asked interview question
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Sorting an Array Containing 0’s, 1’s, and 2’s
Solve the Dutch National Flag problem. Learn how to sort an array of 0s, 1s, and 2s in O(n) time and O(1) space.
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Minimum Number of Platforms Required for a Railway Station
Algorithm to find the minimum number of platforms required for a railway station so that no train has to wait.
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Valid Parenthesis Checker
Solve the Valid Parentheses problem using a stack. A fundamental problem for understanding data structures in interviews.
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Difference between let, var and const in JavaScript
Difference between var, let and const variable declarations in javascript and when to use them effectively with examples.
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Article
Implement an Event Emitter in JavaScript
This is one of the most asked interview questions and In this interview article, we'll dive deep into creating a robust Event Emitter in JavaScript
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Building a TicTacToe game using React
Build a fully functional Tic-Tac-Toe game in React. Learn about state management, game logic, and UI design patterns.
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Building a TypeHead component in React
Step-by-step tutorial on building a Typeahead/Autocomplete component in React with debouncing and API integration.
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Creating a Polyfill for the Reduce Method
Master the Array.reduce method by building a custom polyfill. Understand initial values, accumulators, and edge cases.
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Create Currying Functions with Nested Objects
Deep dive into JavaScript Currying with practical examples involving nested objects and functional programming patterns.
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Create a method to Cache multiple API calls
In modern web development, optimizing performance and reducing server load is crucial. One effective strategy is to cache API responses
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Implementing Memorization in JavaScript
This is one of the most asked interview questions and Memorization in JavaScript refers to the technique of caching and reusing the output of expensive function
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Creating a polyfill for Promise.race method
Learn how to implement a polyfill for Promise.race in JavaScript and understand its behavior with multiple promises.
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Polyfill for Concurrent Asynchronous Operations-Promise.all
Deep dive into concurrent asynchronous operations bit by bit and learn how to create a polyfill for Promise.all.
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Understanding the “this” Keyword in JavaScript
Master the 'this' keyword in JavaScript. Understand how it behaves in global context, arrow functions, and bound methods.
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Debounce in JavaScript: Enhance Frontend Performance
Master Debounce in JavaScript. Learn how it works, why it's used for performance, and how to implement it from scratch.
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Kotak 811 Interview experience - Frontend
The interview lasted around 1 hour and the interviewer is from the BarRaiser. Questions that were asked in Kotak 811 are of medium level.
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Create a Blick click game - Machine coding round
Step-by-step guide to building a Blink Click game, a popular machine coding round question from Zebpay and other companies.
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Creating a polyfill for the map array method in javascript
Explore the internals of the Array.map method and learn how to create a custom polyfill for it in JavaScript.
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Deep cloning Objects in JavaScript with Circular Reference Handling
In JavaScript, object cloning is a common task, but deep copying an object while also handling circular references presents a unique challenge.
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Deep cloning an object in Javascript
In JavaScript, object cloning is a common task, but deep cloning, which involves creating a complete and independent copy of an object and its nested properties
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Building an N x N Grid of Boxes in React - Kotak Interview
You will be given a number, and need to prepare N X N boxes on the screen, clicking on it should show a blue colour.
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Flatten a multi-dimensional array
In the vast realm of JavaScript, arrays reign supreme as versatile containers of data. But when arrays nest within each other, navigating through their depths
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Flatten Nested Objects in JavaScript
Nested objects are a common data structure in JavaScript, providing a convenient way to organize and represent complex data.
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Flexcar interview experience - Round 1
The interview was around 1 hour and the interviewer has almost 6 years of experience in frontend application development.
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Create a polyfill for Object.entries method
Manual implementation of Object.entries() in JavaScript. Understand how to iterate over objects and return key-value pairs.
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Create a polyfill for the filter array method
Understanding the filter method, the need for polyfill and creating a polyfill for the filter method in JavaScript.
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Creating a dynamic counter with Start, Pause and Reset button functionality using React
Learn how to build a dynamic counter with Start, Pause, and Reset functionality in React. A common machine coding interview question.
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