Shubham Gupta

Most asked 52 #reactjs interview questions: 1. What is React? 2. What is useMemo ? 3. What are the features of React ? 4. What is JSX ? 5. What is DOM ? 6. What is Virtual Dom ? 7. What is component life cycle of React class component ? 8. What are fragments in react ? 9. What are props in react ? 10. What are synthetic events in react ? 11. What are the difference between Package.json and Package.lock.json ? 12. What are the differences between client side and server side rendering ? 13. What is state in Reactjs? 14. What are props ? 15. What are the differences between State and Props in react ? 16. What is props drilling ? 17. What are the disadvantages of props drilling and How we can avoid props drilling ? 18. What are Pure components in React ? 19. Whatare Ref’s in React? 20. What is meant by forward ref ? 21. What are Error boundaries ? 22. What are Higher order components in react ? 23. What are the differences between controlled and uncontrolled components ? 24. What is useCallback ? 25. What are the differences between useMemo and useCallback ? 26. What are keys in React ? 27. What is Lazy loading in React ? 28. What is suspense in React ? 29. What are custom hooks ? 30. What is useReducer hook ? 31. What are Portals in react ? 32. What is context in react ? 33. Practical question: Give an example of context api usage ? 34. What is the purpose of callback function as an argument of setState()? 35. Practical question: create a custom hook for increment/decrement counter ? 36. Which lifecycle hooks in class component are replaced with useEffect in functional components ? 37. What is Strict mode in react ? 38. What are the different ways to pass data from child component to parent component in react ? 39. Practical question: How to send data from child to parent using callback functions ? 40. Practical question: How to send the data from child component to parent using useRef ? 41. How do you optimize your react application ? 42. How would you consume a RESTful JSON API in reactjs? 43.different design patterns used in react? 44. context api vs redux 45. prop types in react(How to apply validation on props in react) 46. What are React Mixins ? 47. what are the different hooks you have used ? 48. What are render props in react ? 49. What are the different types of exports and imports ? 50. What are the differences between create element vs clone element in react ? 51. When to use useState and useReducer? 52. What is flushSync in react ?

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🚀 Here’s a Curated List of the Most Asked JavaScript Interview Questions! 🌟 ✅ Basic JavaScript Concepts 1. Explain JavaScript’s Event Loop: How does the event loop work in JavaScript, and what is the role of the call stack and task queue? 2. What is Hoisting?: Explain how variable and function declarations are hoisted in JavaScript. 3. Difference Between `==` and `===`: What is the difference between loose equality (`==`) and strict equality (`===`)? 4. Explain `this` Keyword: How does the value of `this` get determined in different contexts (e.g., global, object methods, constructors)? 5. What are Closures?: Explain closures and provide an example of their use. ✅ Functions and Scope 1. Function Currying: What is function currying and how is it implemented in JavaScript? 2. What is a Callback Function?: Explain the concept of callbacks and provide examples of their use. 3. Explain `bind`, `call`, and `apply`: How do these methods work and how are they different? 4. What is a Self-Invoking Function?: Describe what self-invoking (immediately-invoked function expressions, or IIFE) functions are and their use cases. 5.Difference Between `var`, `let`, and `const`: Explain the differences in scope, hoisting, and mutability. ✅ Arrays and Strings 1. Array Methods: Explain the differences between `map()`, `filter()`, and `reduce()` methods. 2. Find Duplicates in an Array: Write a function to find duplicates in an array. 3. String Manipulation: How can you check if a string is a palindrome? 4. Flatten an Array: Write a function to flatten a nested array. 5. Remove All Falsy Values from Array: How would you remove falsy values from an array? ✅ Asynchronous JavaScript 1. Promises: What is a promise and how does it work? Explain `then()`, `catch()`, and `finally()`. 2. Async/Await: How does `async` and `await` simplify asynchronous code? Provide an example. 3. Error Handling in Promises: How do you handle errors in promises and async/await? 4. Event Delegation: What is event delegation and how does it work in JavaScript? 5. Difference Between `setTimeout` and `setInterval`: Explain how `setTimeout()` and `setInterval()` work and their differences. ✅ Algorithms and Data Structures 1. Reverse a String: Write a function to reverse a string. 2. Find the Largest/Smallest Element in an Array: How would you find the largest or smallest number in an array? 3. Two Sum Problem: Given an array of integers and a target sum, find two numbers that add up to the target. ✅ Advanced Topics 1. Memoization: What is memoization and how can it improve performance? Provide an example. 2. Debouncing and Throttling: Explain the concepts of debouncing and throttling and provide examples of when to use each. 3. JavaScript Design Patterns: Describe common JavaScript design patterns such as Singleton, Factory, and Observer. Keep learning and sharing! 🔷 Follow Muhammad Rafiq. for more related content!

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#javascript coding question Part 3: write javascript program to find unique Items from the given array ? just at 45rs, get ebook with (detailed 149 ques = 42 Reactjs Frequent Ques & Answers, 60+ frequently asked interview questions and answers, 25+ Output based ques & ans, 23+ Coding Questions & ans) 𝐄𝐛𝐨𝐨𝐤 𝐋𝐢𝐧𝐤: https://lnkd.in/gJMmH-PF Follow on Instagram : https://lnkd.in/gXTrcaKP #javascriptdeveloper #reactjs #reactnative #vuejsdeveloper #angular #angulardeveloper

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✅️ Javascript Most Important Interview Questions 🔥🔥 #Follow4more Amit Jain 💖✅️ Here are some of the most important interview questions for JavaScript in 2024, along with relevant hashtags: 1. **Explain the difference between `var`, `let`, and `const`.** - #JavaScript #ES6 #Variables #Hoisting 2. **What is the event loop and how does it work?** - #EventLoop #AsynchronousJS #JavaScript 3. **What are Promises and how do you use them?** - #Promises #AsyncAwait #JavaScript 4. **Explain the concept of closures in JavaScript.** - #Closures #Scope #JavaScript 5. **How does prototypal inheritance work in JavaScript?** - #Prototypes #Inheritance #JavaScript 6. **What are arrow functions and how do they differ from regular functions?** - #ArrowFunctions #ES6 #JavaScript 7. **What is the difference between `==` and `===`?** - #Equality #TypeCoercion #JavaScript 8. **How do you handle asynchronous code in JavaScript?** - #AsyncJS #Callbacks #Promises 9. **What are the new features in ES2020 (or ES2021)?** - #ES2020 #ES2021 #JavaScriptFeatures 10. **Explain the concept of "this" in JavaScript.** - #ThisKeyword #Context #JavaScript 11. **What are modules in JavaScript and how do you use them?** - #Modules #ES6 #JavaScript 12. **What is a JavaScript callback function?** - #Callbacks #Functions #JavaScript 13. **Explain the difference between synchronous and asynchronous code.** - #SyncVSAsync #JavaScript 14. **What are JavaScript closures and how are they useful?** - #Closures #FunctionalProgramming #JavaScript 15. **How do you optimize JavaScript performance?** - #PerformanceOptimization #JavaScript 16. **What is the `fetch` API and how do you use it?** - #FetchAPI #AsyncJS #JavaScript 17. **Explain the concept of `debouncing` and `throttling` in JavaScript.** - #Debounce #Throttle #JavaScript 18. **How do you create and dispatch custom events in JavaScript?** - #CustomEvents #DOM #JavaScript 19. **What is event delegation in JavaScript?** 20. **Explain the concept of "hoisting" in JavaScript These questions cover a broad range of essential JavaScript topics and are likely to be relevant for interviews in 2024 and 2025. #JavaScript #AsyncAwait #AsynchronousProgramming #JSInterviewQuestions #WebDevelopment #CodingInterview #FrontendDevelopment #BackendDevelopment #Promises #ES6 #ES2017 #JS2024 #TechInterview #AsyncFunctions #ErrorHandling #SoftwareDevelopment #Programming #Coding #JavaScriptDevelopers #WebDev #TechSkills #APIHandling #ModernJS #CodeQuality #JSBestPractices

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#javascript Interview question 100. Answer below queries on typeof operator just at 45rs, get ebook with (detailed 142 ques = 42 Reactjs Frequent Ques & Answers, 50+ frequently asked interview questions and answers, 23+ Output based ques & ans, 22+ Coding Questions & ans) 𝐄𝐛𝐨𝐨𝐤 𝐋𝐢𝐧𝐤: https://lnkd.in/gJMmH-PF Interview Guidance: https://lnkd.in/gr9PCuxd Follow on Instagram : https://lnkd.in/gXTrcaKP #javascript #javascriptdeveloper #reactjs #reactnative #vuejsdeveloper #angular #angulardeveloper

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#javascript Interview Question 96: List out some key features of ES6 ? Let and Const declarations. Arrow functions Template literals Destructuring assignment Spread and Rest operators Default parameters Promises Modules Map, Set, Weakmap, Weakset Classes just at 45rs, get ebook with (detailed 142 ques = 42 Reactjs Frequent Ques & Answers, 50+ frequently asked interview questions and answers, 23+ Output based ques & ans, 22+ Coding Questions & ans) 𝐄𝐛𝐨𝐨𝐤 𝐋𝐢𝐧𝐤: https://lnkd.in/gJMmH-PF Follow on Instagram : https://lnkd.in/gXTrcaKP #javascript #javascriptdeveloper #reactjs #reactjsdeveloper #vuejs hashtag #vuejsdeveloper #angular #angulardeveloper

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#javascript Output based Interview question : Part - 59 ===================================== Here even though we are specifying the time out as 0 milliseconds it will not log anything in the console. This is because when javascript engine sees this settimeout it will schedule function execution after 0 milliseconds and pushes this into task queue Now this will wait here until all the synchronous statements are executed successfully. Now In the last time cleartimeout is executed as its not asynchronous it will be executed immediately which will clear the function which is scheduled previously be the settimeout. just at 45rs, get ebook with (detailed 149 ques = 42 Reactjs Frequent Ques & Answers, 60+ frequently asked interview questions and answers, 25+ Output based ques & ans, 23+ Coding Questions & ans) 𝐄𝐛𝐨𝐨𝐤 𝐋𝐢𝐧𝐤: https://lnkd.in/gJMmH-PF Follow on Instagram : https://lnkd.in/gXTrcaKP #javascriptdeveloper #reactjs #reactjsdeveloper #angular #angulardeveloper #vuejs #vuejsdeveloper #javascript

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#javascript coding question 1. Write a JavaScript program to find the maximum number in an array. just at 45rs, get ebook with (detailed 142 ques = 42 Reactjs Frequent Ques & Answers, 50+ frequently asked interview questions and answers, 23+ Output based ques & ans, 22+ Coding Questions & ans) 𝐄𝐛𝐨𝐨𝐤 𝐋𝐢𝐧𝐤: https://lnkd.in/gJMmH-PF Interview Guidance: https://lnkd.in/gr9PCuxd Follow on Instagram : https://lnkd.in/gXTrcaKP #javascript #javascriptdeveloper #reactjs #reactnative #vuejsdeveloper #angular #angulardeveloper

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Hello Friends, After the completion of all the episodes of #namastejavascript. I am not able to stop myself to learn #namastereact and I purchased it in last oct and I have finished it five times and to be very honest whatever knowledge gave by Akshay Saini 🚀is more than the price. So if you want to be a great frontend developer don't hesitate to checkout the #namastereact. So Here is the summary of Ep1, Emmet => Emmet is a web development tool that helps you to write code faster, more efficiently and with less effort, i.e Emmet is a powerful toolkit for web developers for writing HTML and CSS. Instead of typing out long lines of code, you can use abbreviations that Emmet expands into full code. Note : Visual Studio Code (VS Code) comes with built-in support for Emmet. Difference between Library and Framework. Library => A library is a collection of functions, classes, or routines that can be used to perform specific tasks or add specific functionality to an application. Libraries are typically designed to be reusable and can be used in various projects. When using a library, the control flow of the program remains with the developer, who decides when and how to use the library's functions. for ex => React, jQuery etc. Framework =>A framework is a more comprehensive set of tools, libraries, and conventions that provide a foundation on which to build and structure an application. Frameworks often dictate the overall structure of an application and provide guidelines on how different components should interact. For ex => Angular, Django, Springboot etc. Note : Unlike libraries, where the developer retains control over the program's flow, frameworks often dictate the flow of control, and the developer fills in the details. CDN => CDN stands for Content Delivery Network. It is a network of distributed servers that work together to deliver web content, such as images, videos, CSS, and JavaScript files, to users based on their geographic location. Note : CDNs make websites faster by storing copies of website files on servers closer to users. This reduces loading times and improves the browsing experience. What is crossorigin in script tag? In Html the purpose of crossorigin attribute is used to share the resources from one domain to another domain, Basically it is used to handle the cors request that checks whether it is safe to allow for sharing the resources from other domains. The resources may include Audio, Video, Images, Link or External Script that specifies whether to support a cross-origin request or not. What is diference between React and ReactDOM? React is the core library for building user interfaces, while ReactDOM is a companion library that provides the necessary tools for rendering React components to the DOM. So, that's enough for today, next time we'll discuss Ep2 of #namastereact. Cheers! Arjun Kumar #namsatejavascript 🎯 #namastereact 🚀 #namastedev 🔥#frontenddeveloper ⛳

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🚀 Redux & Redux Toolkit Notes for Beginners 🚀 Are you looking to master state management in React applications? Redux and Redux Toolkit are essential tools for anyone aspiring to build scalable, efficient web apps. Whether you're a beginner or looking to upskill yourself for a better job or promotion, these notes will help you start from scratch and build a solid foundation! Key Topics Covered: - Introduction to Redux - Understanding the Redux architecture (Store, Actions, Reducers) - Setting up Redux in a React project - The power of the Redux DevTools - What is Redux Toolkit, and why should you use it? - Simplifying state management with Redux Toolkit’s createSlice, createAsyncThunk - Handling asynchronous actions with Redux - Best practices and advanced patterns If you're aiming for career growth or need Redux knowledge for your next big project, these notes are perfect for you. 💡 Upskill yourself and get ready for new job opportunities or that well-deserved promotion! If you have any doubts or questions, feel free to reach out at [email protected]. #redux #reduxtoolkit #react #frontend #statemanagement #javascript #webdevelopment #career #promotion #learn2earn #upskill

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🎯 Top 40 #JavaScript Interview Questions for #Frontend #Developers As a frontend developer, mastering JavaScript fundamentals is crucial for #interview success. Here's a comprehensive list of frequently asked questions, organized by topic: 🔵 Basic JavaScript Concepts (1-10) 1. JavaScript fundamentals and core features 2. Differences between let, const, and var 3. Hoisting mechanism in JavaScript 4. Understanding closures 5. JavaScript event loop explained 6 .Comparison operators (== vs ===) 7. Variable type checking methods 8. The 'this' keyword usage 9. Function declarations vs expressions 10. setTimeout functionality 🔵 Functions and Scope (11-20) 11. Callback functions explained 12. Pure functions concept 13. call(), apply(), and bind() methods 14. Arguments object in functions 15. Creating and using closures 16. Practical uses of bind() 17. Shallow vs deep copy comparison 18. Call stack functionality 19. Function currying implementation 20. Avoiding callback hell 🔵 Objects and Prototypes (21-30) 21. Prototypal inheritance system 22. Object creation patterns 23. Understanding prototype property 24. Object.create vs constructor pattern 25. Object property manipulation 26. hasOwnProperty method usage 27. Object property modification prevention 28. 'new' keyword functionality 29. Object destructuring techniques 30. null vs undefined differences 🔵 DOM and Events (31-40) 31. Document Object Model basics 32. Vanilla JS element selection 33. Event delegation patterns 34. addEventListener implementation 35. DOM element manipulation 36. Event propagation phases 37. Preventing default event behavior 38. Data attributes usage 39. innerHTML vs textContent 40. Asynchronous code handling 💡 Pro Tip: Practice these concepts by building small projects. Understanding these fundamentals will boost your confidence in technical #interviews. #javascript #webdevelopment #coding #interviewing #frontenddevelopment #programming #coding 💙 Follow Kapil Kumawat for more related content!

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Android basics that help you in React Native (RN) and Native Android development 1. Activity lifecycle: Native: Know how activities start, pause, resume, and stop. RN: Use component lifecycle methods or React Hooks. 2. App UI: Native: Define UI components and layouts in XML (old way) or Jetpack Compose (new way). RN: Use JSX to define UI components and layouts in JavaScript. 3. Screen Navigation: Native: Use intents to navigate and share data between activities. RN: Use React Navigation to navigate between screens. 4. Reusable UI: Native: Implement reusable UI components with fragments (old way) or Jetpack Compose (new way). RN: Use reusable functional (modern) or class components (old) for modular UI building. 5. Managing Permissions: Native: Handle runtime permissions for accessing device features. RN: Use libraries like react-native-permissions to request and check permissions. 6. Resources and Assets: Native: Manage app resources like strings, images, and styles. RN: Manage resources using the local file system and styling with StyleSheet in JavaScript. 7. REST API call/Networking: Native: Perform network operations using Retrofit or OkHttp. RN: Use libraries like Axios or Fetch API. 8. Offline data store: Native: Store and manage local data with SQLite or Room. RN: Use libraries like AsyncStorage 9. Debugging: Native: Use Logcat and Android Studio for logging and debugging. RN: Use console.log, React Native Debugger, or Flipper. 10. Showing lists: Native: Create efficient and flexible lists with RecyclerView. RN: Use FlatList, FlashList, or SectionList for rendering lists and sections of data. #reactjs #reactnative #android #atomxel #comparison

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#javascript Interview question: List out some key features of ES6 ? Let and Const declarations. Arrow functions Template literals Destructuring assignment Spread and Rest operators Default parameters Promises Modules Map, Set, Weakmap, Weakset Classes 𝐣𝐮𝐬𝐭 𝐚𝐭 𝟒𝟓𝐫𝐬, 𝐠𝐞𝐭 𝐞𝐛𝐨𝐨𝐤 𝐰𝐢𝐭𝐡 (detailed 156 ques = 47 Reactjs Frequent Ques & Answers, 65+ frequently asked interview questions and answers, 25+ Output based ques & ans, 23+ Coding Questions & ans, 1 Machine coding ques & ans) 𝐄𝐛𝐨𝐨𝐤 𝐋𝐢𝐧𝐤: https://lnkd.in/gJMmH-PF Follow on Instagram : https://lnkd.in/gXTrcaKP #javascriptdeveloper #reactjs #reactnative #vuejsdeveloper #angular #angulardeveloper

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#javascript Most frequently asked programs in javascript interviews 1. Program to find longest word in a given sentence ? 2. How to check whether a string is palindrome or not ? 3. Write a program to remove duplicates from an array ? 4. Program to find Reverse of a string without using built-in method ? 5. Find the max count of consecutive 1’s in an array ? 6. Find the factorial of given number ? 7. Given 2 arrays that are sorted [0,3,4,31] and [4,6,30]. Merge them and sort [0,3,4,4,6,30,31] ? 8. Create a function which will accepts two arrays arr1 and arr2. The function should return true if every value in arr1 has its corresponding value squared in array2. The frequency of values must be same. 9. Given two strings. Find if one string can be formed by rearranging the letters of other string. 10. Write logic to get unique objects from below array ? I/P: [{name: "sai"},{name:"Nang"},{name: "sai"},{name:"Nang"},{name: "111111"}]; O/P: [{name: "sai"},{name:"Nang"}{name: "111111"} 11. Write a JavaScript program to find the maximum number in an array. 12. Write a JavaScript function that takes an array of numbers and returns a new array with only the even numbers. 13. Write a JavaScript function to check if a given number is prime. 14. Write a JavaScript program to find the largest element in a nested array. [[3, 4, 58], [709, 8, 9, [10, 11]], [111, 2]] 15. Write a JavaScript function that returns the Fibonacci sequence up to a given number of terms. 16. Given a string, write a javascript function to count the occurrences of each character in the string. 17. Write a javascript function that sorts an array of numbers in ascending order. 18. Write a javascript function that sorts an array of numbers in descending order. 19. Write a javascript function that reverses the order of words in a sentence without using the built-in reverse() method. 20. Implement a javascript function that flattens a nested array into a single-dimensional array. 21. Write a function which converts string input into an object ("a.b.c", "someValue"); {a: {b: {c: "someValue"}}} just at 45rs, get ebook with (detailed 142 ques = 42 Reactjs Frequent Ques & Answers, 50+ frequently asked interview questions and answers, 23+ Output based ques & ans, 22+ Coding Questions & ans) 𝐄𝐛𝐨𝐨𝐤 𝐋𝐢𝐧𝐤: https://lnkd.in/gJMmH-PF Follow on Instagram : https://lnkd.in/gXTrcaKP #javascriptdeveloper #reactjs #reactjsdeveloper #angular #angulardeveloper #vuejs #vuejsdeveloper #javascript

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#javascript Most frequently asked programs in javascript interviews 1. Program to find longest word in a given sentence ? 2. How to check whether a string is palindrome or not ? 3. Write a program to remove duplicates from an array ? 4. Program to find Reverse of a string without using built-in method ? 5. Find the max count of consecutive 1’s in an array ? 6. Find the factorial of given number ? 7. Given 2 arrays that are sorted [0,3,4,31] and [4,6,30]. Merge them and sort [0,3,4,4,6,30,31] ? 8. Create a function which will accepts two arrays arr1 and arr2. The function should return true if every value in arr1 has its corresponding value squared in array2. The frequency of values must be same. 9. Given two strings. Find if one string can be formed by rearranging the letters of other string. 10. Write logic to get unique objects from below array ? I/P: [{name: "sai"},{name:"Nang"},{name: "sai"},{name:"Nang"},{name: "111111"}]; O/P: [{name: "sai"},{name:"Nang"}{name: "111111"} 11. Write a JavaScript program to find the maximum number in an array. 12. Write a JavaScript function that takes an array of numbers and returns a new array with only the even numbers. 13. Write a JavaScript function to check if a given number is prime. 14. Write a JavaScript program to find the largest element in a nested array. [[3, 4, 58], [709, 8, 9, [10, 11]], [111, 2]] 15. Write a JavaScript function that returns the Fibonacci sequence up to a given number of terms. 16. Given a string, write a javascript function to count the occurrences of each character in the string. 17. Write a javascript function that sorts an array of numbers in ascending order. 18. Write a javascript function that sorts an array of numbers in descending order. 19. Write a javascript function that reverses the order of words in a sentence without using the built-in reverse() method. 20. Implement a javascript function that flattens a nested array into a single-dimensional array. 21. Write a function which converts string input into an object ("a.b.c", "someValue"); {a: {b: {c: "someValue"}}} just at 45rs, get ebook with (detailed 142 ques = 42 Reactjs Frequent Ques & Answers, 50+ frequently asked interview questions and answers, 23+ Output based ques & ans, 22+ Coding Questions & ans) 𝐄𝐛𝐨𝐨𝐤 𝐋𝐢𝐧𝐤: https://lnkd.in/gJMmH-PF Follow on Instagram : https://lnkd.in/gXTrcaKP #javascriptdeveloper #reactjs #reactjsdeveloper #angular #angulardeveloper #vuejs #vuejsdeveloper #javascript

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Top 50 Angular Interview Questions You Must Know! Here are some essential Angular interview questions to help you prepare: 1. What is the main purpose of Angular? 2. What are directives in Angular and how many types of directives exist? 3. Explain data bindings and the different types. 4. What are the basic components involved in Angular? 5. What’s the difference between AngularJS and Angular? 6. What are components and modules in Angular? 7. What are decorators in Angular? 8. What is metadata or annotations in Angular? 9. What are templates in Angular? 10. What is SPA and how do you implement it in Angular? 11. Explain the importance of routing in Angular & how to implement it. 12. What is lazy loading in Angular? 13. How do you implement lazy loading in Angular? 14. What is Node.js? 15. What is NPM? 16. Why is the node_modules folder important? 17. What is package.json? 18. What is TypeScript? 19. What is the need for Angular CLI? 20. What are services in Angular? 21. When would you use content projection? 22. Explain content projection slots in Angular. 23. Why do we need ViewChild and ViewChildren in Angular? 24. What is a template reference variable? 25. Explain ContentChild and ContentChildren. 26. Differentiate between ViewChild, ViewChildren, ContentChild, and ContentChildren. 27. What is { static: true } in ViewChild? 28. What is the importance of Angular component hooks/life cycles? 29. Explain Angular life cycle hooks in detail. 30. Differentiate between constructor and ngOnInit(). 31. How do you implement lazy loading in Angular? 32. How do you implement HTTP in Angular? 33. How do you pass data between components? 34. What are pipes in Angular? 35. Can you give examples of inbuilt Angular pipes? 36. How do you write a custom pipe? 37. What is RxJs and why is it needed? 38. What are observables and observers? 39. What is a stream in RxJs? 40. What is the use of subscribe in RxJs? 41. How do you unsubscribe from a stream? 42. What are operators in RxJs? 43. Where have you used RxJs in Angular? 44. Differentiate between RxJs and Promises. 45. How do you install RxJs? 46. Why is RxJs called push/reactive and not pull/imperative? 47. Name some RxJs operators. 48. What are interceptors in Angular? 49. How do you implement interceptors? 50. What are some uses of interceptors, and can we provide multi-interceptors? Prepare with these questions and ace your next Angular interview! 🌟 𝐉𝐨𝐢𝐧 𝐦𝐲 𝐖𝐡𝐚𝐭𝐬𝐀𝐩𝐩 𝐜𝐡𝐚𝐧𝐧𝐞𝐥 𝐡𝐞𝐫𝐞: https://lnkd.in/d4YiB9xt Follow Ashish Misal for insightful content on System Design, Javascript and other MERN Technologies! #Angular #InterviewMaterial #InterviewTips #InterviewQuestions

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#javascript Interview question 106. What are the difference between undeclared and undefined variables ? 𝐮𝐧𝐝𝐞𝐜𝐥𝐚𝐫𝐞𝐝: These variables does not exist in the program and they are not declared. If we try to read the value of undeclared variable then we will get a runtime error. 𝐮𝐧𝐝𝐞𝐟𝐢𝐧𝐞𝐝: These variables are declared in the program but are not assigned any value. If we try to access the value of undefined variables, It will return undefined. just at 45rs, get ebook with (detailed 149 ques = 42 Reactjs Frequent Ques & Answers, 60+ frequently asked interview questions and answers, 25+ Output based ques & ans, 23+ Coding Questions & ans) 𝐄𝐛𝐨𝐨𝐤 𝐋𝐢𝐧𝐤: https://lnkd.in/gJMmH-PF Interview Guidance: https://lnkd.in/gr9PCuxd Follow on Instagram : https://lnkd.in/gXTrcaKP #javascript #javascriptdeveloper #reactjs #reactnative #vuejsdeveloper #angular #angulardeveloper

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 ⚛️ Top 50 React JS Interview Questions. ⚛️ 📦 Components: Master functional and class components. 🔄 State & Props: Understand state management and props. ⏳ Lifecycle: Know lifecycle methods and hooks like useEffect. ⚛️ Hooks: Get familiar with essential hooks (useState, useContext, etc.). 🌐 Routing: Learn React Router for navigation. 🎨 Styling: Explore CSS-in-JS, styled-components, and responsive design. ⚡ Performance: Use memoization (React.memo, useMemo) and lazy loading. ✅ Testing: Write unit tests with Jest and end-to-end tests with Cypress. 🛠️ Build Tools: Understand Webpack, Babel, and Create React App. 🗣️ Soft Skills: Communicate clearly and collaborate effectively. ♾️ Follow uzmabegum shaik for more such content and Programming Tips. credits : AlgoTutor learn coding from these websites W3Schools.com JavaScript Mastery freeCodeCamp   👍 Hit Like if you found it helpful! 🔁 Repost it to your network! 🔖 Save it for future reference! 📤 Share it with your connections! 💬 Comment your thoughts below! 😊 𝐇𝐚𝐩𝐩𝐲 𝐜𝐨𝐝𝐢𝐧𝐠! #webdevelopment #JavScript #js #html #css #cssanimations #csscard #csshover #hovereffect #ResponsiveDesign #CSSFlexbox #WebDesign #ImageHoverEffect #InteractiveDesign #CreativeCoding #WebDevelopment #FrontEndDevelopment #CSSMagic #CodeArt #WebInspiration #UIUXDesign #DesignInspiration #WebDesignerLife #BeautifulWeb #ModernWebDesign #ResponsiveWeb #HoverEffects #CSSDesign #FlexboxMagic #csscard #hovereffect #expressjs #explore #javascript #js #frontend #backend #100dayscoding #reacthook #linkedin #linkedinlearning #linkedincommunity #Techjobs #learncode #womeninTech #ITtech #DevCommunity #Techtrends #SoftwareEngineering #Devtips #developers #react #reactjs #freshers #job #search #jobsearch #jobs  #useful #techniques #tips #clean #code #guide #developer #web #development #code #roadmap #webdevelopment #mern #mean  #nodejs #expressjs #postgresql #sql #guide #useful #notes

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✅️ Advance JavaScript Concepts For Interview 🤩🤩 #followformore Amit Jain ❤️ ✅️ Advanced JavaScript concepts delve into more intricate and nuanced aspects of the language, pushing beyond basic syntax and functionality. Here are several key areas to explore: 1. **Closures**: Understanding how closures work is crucial for mastering JavaScript. Closures allow functions to retain access to variables from their containing scope even after the parent function has finished executing. 2. **Prototypes and Prototypal Inheritance**: JavaScript is a prototype-based language, which means that objects can inherit properties and methods from other objects. Understanding prototypes and how inheritance works is essential for writing efficient and maintainable code. 3. **Asynchronous JavaScript**: Asynchronous programming is fundamental to modern web development, particularly with the rise of AJAX and single-page applications. Concepts such as callbacks, promises, async/await, 5. **ES6+ Features**: Stay updated with the latest ECMAScript features like arrow functions, template literals, destructuring, spread/rest operators, and more, to write cleaner and more expressive code. 6. **Modules and Module Bundlers**: Learn about JavaScript modules to organize code into reusable components and understand how bundlers like Webpack or Parcel optimize and bundle these modules for production use. 7. **Error Handling**: Explore advanced error handling techniques such as custom error classes, try/catch blocks, and error propagation to build robust applications that handle errors gracefully. 8. **Performance Optimization**: Dive into techniques for optimizing JavaScript performance, including minimizing DOM manipulation, reducing memory usage, and optimizing algorithms and data structures. 9. **Web APIs and Browser Compatibility**: Gain knowledge about various web APIs like the Fetch API, WebSockets, and the Intersection Observer API, and ensure cross-browser compatibility by understanding polyfills and feature detection. 10. **Testing and Debugging**: Familiarize yourself with advanced testing frameworks like Jest or Mocha for unit testing and tools like Chrome DevTools for debugging and profiling JavaScript code. #LinkedIn - #JavaScript - #WebDevelopment - #Programming - #FrontendDevelopment - #CodeOptimization - #AsyncJavaScript - #ES6 - #FunctionalProgramming - #WebAPIs - #DeveloperTools

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