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Top 50 Most Asked MERN Stack Interview Questions and Answers for 2025

 Top 50 Most Asked MERN Stack Interview Questions and Answers for 2025 Now a days most of the IT Company asked NODE JS Question mostly in interview. I am creating this article to provide help to all MERN Stack developer , who is in doubt that which type of question can be asked in MERN Stack  then they can learn from this article. I am Shiva Gautam,  I have 15 Years of experience in Multiple IT Technology, I am Founder of Shiva Concept Solution Best Programming Institute with 100% Job placement guarantee. for more information visit  Shiva Concept Solution 1. What is the MERN Stack? Answer : MERN Stack is a full-stack JavaScript framework using MongoDB (database), Express.js (backend framework), React (frontend library), and Node.js (server runtime). It’s popular for building fast, scalable web apps with one language—JavaScript. 2. What is MongoDB, and why use it in MERN? Answer : MongoDB is a NoSQL database that stores data in flexible, JSON-like documents. It...
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What is Route53?

  Step 1: What is Route 53? (Classroom Explanation) Route53 is intermediate service of AWS that connect custom domain to AWS Instance. Domain provide path or url such as www.google.com is the domain and int point to google.com server. We should always integrate hosting server as a nameserver property under domain name. create free domain https://freedomain.one/Direct.sv?cmd=userDomainPanel&domainname=codemugindore.work.gd #!/bin/bash sudo yum update -y # Install Apache web server (httpd) sudo yum install -y httpd sudo systemctl start httpd sudo systemctl enable httpd # Create a simple HTML file to verify the web server is running echo "<html><h1>Welcome to Apache Web Server on Amazon Linux!</h1></html>" > /var/www/html/index.html "Imagine the internet is a giant city, and every website is a house with a unique address (IP address, like 192.0.2.1). But these addresses are hard to remember, so we give houses names—like ' www.example.co...
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FAANG Company Interview Question | Most Important MNC Interview Question

 Practice Questions Find all triplets with zero sum Generate all binary strings from given pattern Count of strings that can be formed using a, b and c under given constraints Find largest word in dictionary by deleting some characters of given string Find subarray with given sum | Set 1 (Nonnegative Numbers) Find the longest substring with k unique characters in a given string Find the two non-repeating elements in an array of repeating elements Flood fill Algorithm – how to implement fill() in paint? Meta Strings (Check if two strings can become same after a swap in one string) Print all Jumping Numbers smaller than or equal to a given value Sum of all the numbers that are formed from root to leaf paths The Celebrity Problem Unbounded Knapsack (Repetition of items allowed) Medium Level Backtracking | Set 7 (Sudoku) Boggle | Set 2 (Using Trie) Check if a Binary Tree contains duplicate subtrees of size 2 or more Dynamic Programming | Set 33 (Find if a string is interleaved of two o...
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JavaScript Predefine Function for Array and String | Predefine Javascript function list

 JavaScript Predefine Function for Array and String: JavaScript has several predefined functions for arrays that can be quite handy. Here are a few of them: 1. `push()`: Adds one or more elements to the end of an array.    let fruits = ['apple', 'banana'];    fruits.push('orange');    // ['apple', 'banana', 'orange']    2. `pop()`: Removes the last element from an array.      let fruits = ['apple', 'banana', 'orange'];    fruits.pop();    // ['apple', 'banana']   3. `shift()`: Removes the first element from an array.      let fruits = ['apple', 'banana', 'orange'];    fruits.shift();    // ['banana', 'orange']    4. `unshift()`: Adds one or more elements to the beginning of an array.    `    let fruits = ['banana', 'orange'];    fruits.unshift('apple');    // ['apple', 'banana', 'orange'] 5. `splice()`: Adds or r...
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C# 13 New Features | 10 Important Features of C# 13 under .NET 9

Exploring New Features in C# 13 Hi .NET learner, I am Shiva Gautam and now i am discussing about C#13 Features, you know very well that now .NET 9.0 is released with C# 13 Version. here is the latest features of C# 13: 1. Params Collections The `params` keyword can now be used with any collection type that implements `IEnumerable<T>`. This makes it easier to pass a variable number of arguments to methods. e.g: class Program {     public static void PrintNumbers(params IEnumerable<int> numbers)     {         foreach (var number in numbers)         {             Console.WriteLine(number);         }     }     public static void Main()     {         PrintNumbers(1, 2, 3, 4, 5);     }      } 2) Enhanced Support for ReadOnlySpan<T> In C# 13, the support for  ReadOnlySpan<T>  ha...
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