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💼 Starting an online business is practically free:
1. Bubble - Create apps
2. Figma - Design your website
3. Notion - Project Management
4. Tally form - Create free forms and surveys
5. Zapier - Automate repetitive tasks between apps
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1. Bubble - Create apps
2. Figma - Design your website
3. Notion - Project Management
4. Tally form - Create free forms and surveys
5. Zapier - Automate repetitive tasks between apps
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❤1
✅ 20 Medium-Level Web Development Interview Questions (with Detailed Answers)
1. What is the difference between HTML, CSS, and JavaScript
• HTML: Structures content
• CSS: Styles content
• JavaScript: Adds interactivity and dynamic behavior
2. What is responsive web design
Designing websites that adapt to different screen sizes and devices using flexible grids, media queries, and fluid layouts.
3. What are semantic HTML elements
Elements that clearly describe their meaning (e.g.,
4. What is the DOM
Document Object Model — a tree-like structure representing HTML elements. JavaScript can manipulate it to update content dynamically.
5. What is the difference between GET and POST methods
• GET: Sends data via URL, used for fetching
• POST: Sends data in body, used for submitting forms securely
6. What is the box model in CSS
Every HTML element is a box:
Content → Padding → Border → Margin
7. What is the difference between relative, absolute, and fixed positioning in CSS
• Relative: Moves element relative to its normal position
• Absolute: Positions element relative to nearest positioned ancestor
• Fixed: Stays in place even when scrolling
8. What is the difference between == and === in JavaScript
•
•
9. What is event bubbling in JavaScript
Events propagate from child to parent elements. Can be controlled using
10. What is the difference between localStorage and sessionStorage
•
•
11. What is a RESTful API
An architectural style for designing networked applications using HTTP methods (GET, POST, PUT, DELETE) and stateless communication.
12. What is the difference between frontend and backend development
• Frontend: Client-side (UI/UX, HTML/CSS/JS)
• Backend: Server-side (databases, APIs, authentication)
13. What are common HTTP status codes
• 200 OK
• 404 Not Found
• 500 Internal Server Error
• 403 Forbidden
• 301 Moved Permanently
14. What is a promise in JavaScript
An object representing the eventual completion or failure of an async operation.
States: pending, fulfilled, rejected
15. What is the difference between synchronous and asynchronous code
• Synchronous: Executes line by line
• Asynchronous: Executes independently, doesn’t block the main thread
16. What is a CSS preprocessor
Tools like SASS or LESS that add features to CSS (variables, nesting, mixins) and compile into standard CSS.
17. What is the role of frameworks like React, Angular, or Vue
They simplify building complex UIs with reusable components, state management, and routing.
18. What is the difference between SQL and NoSQL databases
• SQL: Structured, relational (e.g., MySQL)
• NoSQL: Flexible schema, document-based (e.g., MongoDB)
19. What is version control and why is Git important
Version control tracks changes in code. Git allows collaboration, branching, and rollback. Platforms: GitHub, GitLab, Bitbucket
20. How do you optimize website performance
• Minify CSS/JS
• Use lazy loading
• Compress images
• Use CDN
• Reduce HTTP requests
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1. What is the difference between HTML, CSS, and JavaScript
• HTML: Structures content
• CSS: Styles content
• JavaScript: Adds interactivity and dynamic behavior
2. What is responsive web design
Designing websites that adapt to different screen sizes and devices using flexible grids, media queries, and fluid layouts.
3. What are semantic HTML elements
Elements that clearly describe their meaning (e.g.,
<article>, <section>, <nav>, <header>). Improves accessibility and SEO.4. What is the DOM
Document Object Model — a tree-like structure representing HTML elements. JavaScript can manipulate it to update content dynamically.
5. What is the difference between GET and POST methods
• GET: Sends data via URL, used for fetching
• POST: Sends data in body, used for submitting forms securely
6. What is the box model in CSS
Every HTML element is a box:
Content → Padding → Border → Margin
7. What is the difference between relative, absolute, and fixed positioning in CSS
• Relative: Moves element relative to its normal position
• Absolute: Positions element relative to nearest positioned ancestor
• Fixed: Stays in place even when scrolling
8. What is the difference between == and === in JavaScript
•
==: Compares values with type coercion•
===: Strict comparison (value and type)9. What is event bubbling in JavaScript
Events propagate from child to parent elements. Can be controlled using
stopPropagation().10. What is the difference between localStorage and sessionStorage
•
localStorage: Persistent across sessions•
sessionStorage: Cleared when tab is closed11. What is a RESTful API
An architectural style for designing networked applications using HTTP methods (GET, POST, PUT, DELETE) and stateless communication.
12. What is the difference between frontend and backend development
• Frontend: Client-side (UI/UX, HTML/CSS/JS)
• Backend: Server-side (databases, APIs, authentication)
13. What are common HTTP status codes
• 200 OK
• 404 Not Found
• 500 Internal Server Error
• 403 Forbidden
• 301 Moved Permanently
14. What is a promise in JavaScript
An object representing the eventual completion or failure of an async operation.
States: pending, fulfilled, rejected
15. What is the difference between synchronous and asynchronous code
• Synchronous: Executes line by line
• Asynchronous: Executes independently, doesn’t block the main thread
16. What is a CSS preprocessor
Tools like SASS or LESS that add features to CSS (variables, nesting, mixins) and compile into standard CSS.
17. What is the role of frameworks like React, Angular, or Vue
They simplify building complex UIs with reusable components, state management, and routing.
18. What is the difference between SQL and NoSQL databases
• SQL: Structured, relational (e.g., MySQL)
• NoSQL: Flexible schema, document-based (e.g., MongoDB)
19. What is version control and why is Git important
Version control tracks changes in code. Git allows collaboration, branching, and rollback. Platforms: GitHub, GitLab, Bitbucket
20. How do you optimize website performance
• Minify CSS/JS
• Use lazy loading
• Compress images
• Use CDN
• Reduce HTTP requests
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Web Development Roadmap
|
|-- Fundamentals
| |-- Web Basics
| | |-- Internet and HTTP/HTTPS Protocols
| | |-- Domain Names and Hosting
| | |-- Client-Server Architecture
| |
| |-- HTML (HyperText Markup Language)
| | |-- Structure of a Web Page
| | |-- Semantic HTML
| | |-- Forms and Validations
| |
| |-- CSS (Cascading Style Sheets)
| | |-- Selectors and Properties
| | |-- Box Model
| | |-- Responsive Design (Media Queries, Flexbox, Grid)
| | |-- CSS Frameworks (Bootstrap, Tailwind CSS)
| |
| |-- JavaScript (JS)
| | |-- ES6+ Features
| | |-- DOM Manipulation
| | |-- Fetch API and Promises
| | |-- Event Handling
| |
|-- Version Control Systems
| |-- Git Basics
| |-- GitHub/GitLab
| |-- Branching and Merging
|
|-- Front-End Development
| |-- Advanced JavaScript
| | |-- Modules and Classes
| | |-- Error Handling
| | |-- Asynchronous Programming (Async/Await)
| |
| |-- Frameworks and Libraries
| | |-- React (Hooks, Context API)
| | |-- Angular (Components, Services)
| | |-- Vue.js (Directives, Vue Router)
| |
| |-- State Management
| | |-- Redux
| | |-- MobX
| |
|-- Back-End Development
| |-- Server-Side Languages
| | |-- Node.js (Express.js)
| | |-- Python (Django, Flask)
| | |-- PHP (Laravel)
| | |-- Ruby (Ruby on Rails)
| |
| |-- Database Management
| | |-- SQL Databases (MySQL, PostgreSQL)
| | |-- NoSQL Databases (MongoDB, Firebase)
| |
| |-- Authentication and Authorization
| | |-- JWT (JSON Web Tokens)
| | |-- OAuth 2.0
| |
|-- APIs and Microservices
| |-- RESTful APIs
| |-- GraphQL
| |-- API Security (Rate Limiting, CORS)
|
|-- Full-Stack Development
| |-- Integrating Front-End and Back-End
| |-- MERN Stack (MongoDB, Express.js, React, Node.js)
| |-- MEAN Stack (MongoDB, Express.js, Angular, Node.js)
| |-- JAMstack (JavaScript, APIs, Markup)
|
|-- DevOps and Deployment
| |-- Build Tools (Webpack, Vite)
| |-- Containerization (Docker, Kubernetes)
| |-- CI/CD Pipelines (Jenkins, GitHub Actions)
| |-- Cloud Platforms (AWS, Azure, Google Cloud)
| |-- Hosting (Netlify, Vercel, Heroku)
|
|-- Web Performance Optimization
| |-- Minification and Compression
| |-- Lazy Loading
| |-- Code Splitting
| |-- Caching (Service Workers)
|
|-- Web Security
| |-- HTTPS and SSL
| |-- Cross-Site Scripting (XSS)
| |-- SQL Injection Prevention
| |-- Content Security Policy (CSP)
|
|-- Specializations
| |-- Progressive Web Apps (PWAs)
| |-- Single-Page Applications (SPAs)
| |-- Server-Side Rendering (Next.js, Nuxt.js)
| |-- WebAssembly
|
|-- Trends and Advanced Topics
| |-- Web 3.0 and Decentralized Apps (dApps)
| |-- Motion UI and Animations
| |-- AI Integration in Web Apps
| |-- Real-Time Applications
|
|-- Fundamentals
| |-- Web Basics
| | |-- Internet and HTTP/HTTPS Protocols
| | |-- Domain Names and Hosting
| | |-- Client-Server Architecture
| |
| |-- HTML (HyperText Markup Language)
| | |-- Structure of a Web Page
| | |-- Semantic HTML
| | |-- Forms and Validations
| |
| |-- CSS (Cascading Style Sheets)
| | |-- Selectors and Properties
| | |-- Box Model
| | |-- Responsive Design (Media Queries, Flexbox, Grid)
| | |-- CSS Frameworks (Bootstrap, Tailwind CSS)
| |
| |-- JavaScript (JS)
| | |-- ES6+ Features
| | |-- DOM Manipulation
| | |-- Fetch API and Promises
| | |-- Event Handling
| |
|-- Version Control Systems
| |-- Git Basics
| |-- GitHub/GitLab
| |-- Branching and Merging
|
|-- Front-End Development
| |-- Advanced JavaScript
| | |-- Modules and Classes
| | |-- Error Handling
| | |-- Asynchronous Programming (Async/Await)
| |
| |-- Frameworks and Libraries
| | |-- React (Hooks, Context API)
| | |-- Angular (Components, Services)
| | |-- Vue.js (Directives, Vue Router)
| |
| |-- State Management
| | |-- Redux
| | |-- MobX
| |
|-- Back-End Development
| |-- Server-Side Languages
| | |-- Node.js (Express.js)
| | |-- Python (Django, Flask)
| | |-- PHP (Laravel)
| | |-- Ruby (Ruby on Rails)
| |
| |-- Database Management
| | |-- SQL Databases (MySQL, PostgreSQL)
| | |-- NoSQL Databases (MongoDB, Firebase)
| |
| |-- Authentication and Authorization
| | |-- JWT (JSON Web Tokens)
| | |-- OAuth 2.0
| |
|-- APIs and Microservices
| |-- RESTful APIs
| |-- GraphQL
| |-- API Security (Rate Limiting, CORS)
|
|-- Full-Stack Development
| |-- Integrating Front-End and Back-End
| |-- MERN Stack (MongoDB, Express.js, React, Node.js)
| |-- MEAN Stack (MongoDB, Express.js, Angular, Node.js)
| |-- JAMstack (JavaScript, APIs, Markup)
|
|-- DevOps and Deployment
| |-- Build Tools (Webpack, Vite)
| |-- Containerization (Docker, Kubernetes)
| |-- CI/CD Pipelines (Jenkins, GitHub Actions)
| |-- Cloud Platforms (AWS, Azure, Google Cloud)
| |-- Hosting (Netlify, Vercel, Heroku)
|
|-- Web Performance Optimization
| |-- Minification and Compression
| |-- Lazy Loading
| |-- Code Splitting
| |-- Caching (Service Workers)
|
|-- Web Security
| |-- HTTPS and SSL
| |-- Cross-Site Scripting (XSS)
| |-- SQL Injection Prevention
| |-- Content Security Policy (CSP)
|
|-- Specializations
| |-- Progressive Web Apps (PWAs)
| |-- Single-Page Applications (SPAs)
| |-- Server-Side Rendering (Next.js, Nuxt.js)
| |-- WebAssembly
|
|-- Trends and Advanced Topics
| |-- Web 3.0 and Decentralized Apps (dApps)
| |-- Motion UI and Animations
| |-- AI Integration in Web Apps
| |-- Real-Time Applications
👍2❤1🤯1
SQL vs Python Programming: Quick Comparison ✍
📌 SQL Programming
• Query data from databases
• Filter, join, aggregate rows
Best fields
• Data Analytics
• Business Intelligence
• Reporting and MIS
• Entry-level Data Engineering
Job titles
• Data Analyst
• Business Analyst
• BI Analyst
• SQL Developer
Hiring reality
• Asked in most analyst interviews
• Used daily in analyst roles
India salary range
• Fresher: 4–8 LPA
• Mid-level: 8–15 LPA
Real tasks
• Monthly sales report
• Top customers by revenue
• Duplicate removal
📌 Python Programming
• Clean and analyze data
• Automate workflows
• Build models
Where you work
• Notebooks
• Scripts
• ML pipelines
Best fields
• Data Science
• Machine Learning
• Automation
• Advanced Analytics
Job titles
• Data Scientist
• ML Engineer
• Analytics Engineer
• Python Developer
Hiring reality
• Common in mid to senior roles
• Strong demand in AI teams
India salary range
• Fresher: 6–10 LPA
• Mid-level: 12–25 LPA
Real tasks
• Churn prediction
• Report automation
• File handling CSV, Excel, JSON
⚔️ Quick comparison
• Data source
SQL stays inside databases
Python pulls data from anywhere
• Speed
SQL runs fast on large tables
Python slows with raw big data
• Learning
SQL is beginner-friendly
Python needs coding basics
🎯 Role-based choice
• Data Analyst
SQL required
Python adds value
• Data Scientist
Python required
SQL used to fetch data
• Business Analyst
SQL works for most roles
Python helps automate work
• Data Engineer
SQL for pipelines
Python for processing
✅ Best career move
• Learn SQL first for entry
• Add Python for growth
• Use both in real projects
Which one do you prefer?
SQL 👍
Python ❤️
Both 🙏
None 😮
📌 SQL Programming
• Query data from databases
• Filter, join, aggregate rows
Best fields
• Data Analytics
• Business Intelligence
• Reporting and MIS
• Entry-level Data Engineering
Job titles
• Data Analyst
• Business Analyst
• BI Analyst
• SQL Developer
Hiring reality
• Asked in most analyst interviews
• Used daily in analyst roles
India salary range
• Fresher: 4–8 LPA
• Mid-level: 8–15 LPA
Real tasks
• Monthly sales report
• Top customers by revenue
• Duplicate removal
📌 Python Programming
• Clean and analyze data
• Automate workflows
• Build models
Where you work
• Notebooks
• Scripts
• ML pipelines
Best fields
• Data Science
• Machine Learning
• Automation
• Advanced Analytics
Job titles
• Data Scientist
• ML Engineer
• Analytics Engineer
• Python Developer
Hiring reality
• Common in mid to senior roles
• Strong demand in AI teams
India salary range
• Fresher: 6–10 LPA
• Mid-level: 12–25 LPA
Real tasks
• Churn prediction
• Report automation
• File handling CSV, Excel, JSON
⚔️ Quick comparison
• Data source
SQL stays inside databases
Python pulls data from anywhere
• Speed
SQL runs fast on large tables
Python slows with raw big data
• Learning
SQL is beginner-friendly
Python needs coding basics
🎯 Role-based choice
• Data Analyst
SQL required
Python adds value
• Data Scientist
Python required
SQL used to fetch data
• Business Analyst
SQL works for most roles
Python helps automate work
• Data Engineer
SQL for pipelines
Python for processing
✅ Best career move
• Learn SQL first for entry
• Add Python for growth
• Use both in real projects
Which one do you prefer?
SQL 👍
Python ❤️
Both 🙏
None 😮
❤2
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📚 Languages used in:
1⃣ Web Development
🔢 Software Development
🔢 Machine Learning
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1⃣ Web Development
🔢 Software Development
🔢 Machine Learning
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✅ 8-Week Beginner Roadmap to Learn Web Development 🌐✨
🗓️ Week 1: Build a Strong Foundation
⦁ Learn HTML: structure web content with tags, lists, tables, forms
⦁ Learn CSS: style webpages using selectors, properties, layouts
⦁ Practice on interactive platforms like freeCodeCamp or The Odin Project
🗓️ Week 2: Dive into JavaScript Basics
⦁ Understand variables, functions, loops, conditionals, events
⦁ Get familiar with making pages interactive (e.g., to-do list, calculator)
⦁ Use small projects to solidify learning
🗓️ Week 3: Advanced CSS & Responsive Design
⦁ Learn Flexbox, Grid, media queries for responsive layouts
⦁ Explore CSS frameworks like Bootstrap or Tailwind CSS
⦁ Practice building mobile-friendly web pages
🗓️ Week 4: Front-End Frameworks Basics
⦁ Choose one: React.js (most popular), Vue.js (easy for beginners), or Angular
⦁ Learn component-based architecture and state management basics
⦁ Build small UI components (buttons, forms, modals)
🗓️ Week 5: Version Control with Git & GitHub
⦁ Learn Git basics: init, add, commit, branch, merge, push
⦁ Host projects on GitHub and understand collaboration workflows
⦁ Practice by pushing your previous week projects
🗓️ Week 6: Back-End Basics
⦁ Understand what servers and APIs are
⦁ Learn a backend language like Node.js (JavaScript) or Python (recommended for beginners)
⦁ Explore databases basics (SQL or NoSQL) and CRUD operations
🗓️ Week 7: Building Full-Stack Applications
⦁ Combine front-end and back-end skills in simple projects
⦁ Learn about RESTful APIs, authentication & authorization basics
⦁ Deploy projects on platforms like Heroku, Netlify, or Vercel
🗓️ Week 8: Capstone Project + Deployment
⦁ Build a complete web app (e.g., blog, to-do list, portfolio) from scratch
⦁ Make sure it’s responsive, interactive, and connected to a database
⦁ Deploy and share it online (GitHub + hosting platform)
💡 Tips:
⦁ Code daily and build small projects to practice concepts
⦁ Use resources like freeCodeCamp, The Odin Project, or YouTube tutorials
💬 Tap ❤️ for the detailed explanation of each topic!
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🗓️ Week 1: Build a Strong Foundation
⦁ Learn HTML: structure web content with tags, lists, tables, forms
⦁ Learn CSS: style webpages using selectors, properties, layouts
⦁ Practice on interactive platforms like freeCodeCamp or The Odin Project
🗓️ Week 2: Dive into JavaScript Basics
⦁ Understand variables, functions, loops, conditionals, events
⦁ Get familiar with making pages interactive (e.g., to-do list, calculator)
⦁ Use small projects to solidify learning
🗓️ Week 3: Advanced CSS & Responsive Design
⦁ Learn Flexbox, Grid, media queries for responsive layouts
⦁ Explore CSS frameworks like Bootstrap or Tailwind CSS
⦁ Practice building mobile-friendly web pages
🗓️ Week 4: Front-End Frameworks Basics
⦁ Choose one: React.js (most popular), Vue.js (easy for beginners), or Angular
⦁ Learn component-based architecture and state management basics
⦁ Build small UI components (buttons, forms, modals)
🗓️ Week 5: Version Control with Git & GitHub
⦁ Learn Git basics: init, add, commit, branch, merge, push
⦁ Host projects on GitHub and understand collaboration workflows
⦁ Practice by pushing your previous week projects
🗓️ Week 6: Back-End Basics
⦁ Understand what servers and APIs are
⦁ Learn a backend language like Node.js (JavaScript) or Python (recommended for beginners)
⦁ Explore databases basics (SQL or NoSQL) and CRUD operations
🗓️ Week 7: Building Full-Stack Applications
⦁ Combine front-end and back-end skills in simple projects
⦁ Learn about RESTful APIs, authentication & authorization basics
⦁ Deploy projects on platforms like Heroku, Netlify, or Vercel
🗓️ Week 8: Capstone Project + Deployment
⦁ Build a complete web app (e.g., blog, to-do list, portfolio) from scratch
⦁ Make sure it’s responsive, interactive, and connected to a database
⦁ Deploy and share it online (GitHub + hosting platform)
💡 Tips:
⦁ Code daily and build small projects to practice concepts
⦁ Use resources like freeCodeCamp, The Odin Project, or YouTube tutorials
💬 Tap ❤️ for the detailed explanation of each topic!
@CodingCoursePro
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✅Meta interview questions : Most asked in last 30 days
1. 1249. Minimum Remove to Make Valid Parentheses
2. 408. Valid Word Abbreviation
3. 215. Kth Largest Element in an Array
4. 314. Binary Tree Vertical Order Traversal
5. 88. Merge Sorted Array
6. 339. Nested List Weight Sum
7. 680. Valid Palindrome II
8. 973. K Closest Points to Origin
9. 1650. Lowest Common Ancestor of a Binary Tree III
10. 1. Two Sum
11. 791. Custom Sort String
12. 56. Merge Intervals
13. 528. Random Pick with Weight
14. 1570. Dot Product of Two Sparse Vectors
15. 50. Pow(x, n)
16. 65. Valid Number
17. 227. Basic Calculator II
18. 560. Subarray Sum Equals K
19. 71. Simplify Path
20. 200. Number of Islands
21. 236. Lowest Common Ancestor of a Binary Tree
22. 347. Top K Frequent Elements
23. 498. Diagonal Traverse
24. 543. Diameter of Binary Tree
25. 1768. Merge Strings Alternately
26. 2. Add Two Numbers
27. 4. Median of Two Sorted Arrays
28. 7. Reverse Integer
29. 31. Next Permutation
30. 34. Find First and Last Position of Element in Sorted Array
31. 84. Largest Rectangle in Histogram
32. 146. LRU Cache
33. 162. Find Peak Element
34. 199. Binary Tree Right Side View
35. 938. Range Sum of BST
36. 17. Letter Combinations of a Phone Number
37. 125. Valid Palindrome
38. 153. Find Minimum in Rotated Sorted Array
39. 283. Move Zeroes
40. 523. Continuous Subarray Sum
41. 658. Find K Closest Elements
42. 670. Maximum Swap
43. 827. Making A Large Island
44. 987. Vertical Order Traversal of a Binary Tree
45. 1757. Recyclable and Low Fat Products
46. 1762. Buildings With an Ocean View
47. 2667. Create Hello World Function
48. 5. Longest Palindromic Substring
49. 15. 3Sum
50. 19. Remove Nth Node From End of List
51. 70. Climbing Stairs
52. 80. Remove Duplicates from Sorted Array II
53. 113. Path Sum II
54. 121. Best Time to Buy and Sell Stock
55. 127. Word Ladder
56. 128. Longest Consecutive Sequence
57. 133. Clone Graph
58. 138. Copy List with Random Pointer
59. 140. Word Break II
60. 142. Linked List Cycle II
61. 145. Binary Tree Postorder Traversal
62. 173. Binary Search Tree Iterator
63. 206. Reverse Linked List
64. 207. Course Schedule
65. 394. Decode String
66. 415. Add Strings
67. 437. Path Sum III
68. 468. Validate IP Address
70. 691. Stickers to Spell Word
71. 725. Split Linked List in Parts
72. 766. Toeplitz Matrix
73. 708. Insert into a Sorted Circular Linked List
74. 1091. Shortest Path in Binary Matrix
75. 1514. Path with Maximum Probability
76. 1609. Even Odd Tree
77. 1868. Product of Two Run-Length Encoded Arrays
78. 2022. Convert 1D Array Into 2D Array
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1. 1249. Minimum Remove to Make Valid Parentheses
2. 408. Valid Word Abbreviation
3. 215. Kth Largest Element in an Array
4. 314. Binary Tree Vertical Order Traversal
5. 88. Merge Sorted Array
6. 339. Nested List Weight Sum
7. 680. Valid Palindrome II
8. 973. K Closest Points to Origin
9. 1650. Lowest Common Ancestor of a Binary Tree III
10. 1. Two Sum
11. 791. Custom Sort String
12. 56. Merge Intervals
13. 528. Random Pick with Weight
14. 1570. Dot Product of Two Sparse Vectors
15. 50. Pow(x, n)
16. 65. Valid Number
17. 227. Basic Calculator II
18. 560. Subarray Sum Equals K
19. 71. Simplify Path
20. 200. Number of Islands
21. 236. Lowest Common Ancestor of a Binary Tree
22. 347. Top K Frequent Elements
23. 498. Diagonal Traverse
24. 543. Diameter of Binary Tree
25. 1768. Merge Strings Alternately
26. 2. Add Two Numbers
27. 4. Median of Two Sorted Arrays
28. 7. Reverse Integer
29. 31. Next Permutation
30. 34. Find First and Last Position of Element in Sorted Array
31. 84. Largest Rectangle in Histogram
32. 146. LRU Cache
33. 162. Find Peak Element
34. 199. Binary Tree Right Side View
35. 938. Range Sum of BST
36. 17. Letter Combinations of a Phone Number
37. 125. Valid Palindrome
38. 153. Find Minimum in Rotated Sorted Array
39. 283. Move Zeroes
40. 523. Continuous Subarray Sum
41. 658. Find K Closest Elements
42. 670. Maximum Swap
43. 827. Making A Large Island
44. 987. Vertical Order Traversal of a Binary Tree
45. 1757. Recyclable and Low Fat Products
46. 1762. Buildings With an Ocean View
47. 2667. Create Hello World Function
48. 5. Longest Palindromic Substring
49. 15. 3Sum
50. 19. Remove Nth Node From End of List
51. 70. Climbing Stairs
52. 80. Remove Duplicates from Sorted Array II
53. 113. Path Sum II
54. 121. Best Time to Buy and Sell Stock
55. 127. Word Ladder
56. 128. Longest Consecutive Sequence
57. 133. Clone Graph
58. 138. Copy List with Random Pointer
59. 140. Word Break II
60. 142. Linked List Cycle II
61. 145. Binary Tree Postorder Traversal
62. 173. Binary Search Tree Iterator
63. 206. Reverse Linked List
64. 207. Course Schedule
65. 394. Decode String
66. 415. Add Strings
67. 437. Path Sum III
68. 468. Validate IP Address
70. 691. Stickers to Spell Word
71. 725. Split Linked List in Parts
72. 766. Toeplitz Matrix
73. 708. Insert into a Sorted Circular Linked List
74. 1091. Shortest Path in Binary Matrix
75. 1514. Path with Maximum Probability
76. 1609. Even Odd Tree
77. 1868. Product of Two Run-Length Encoded Arrays
78. 2022. Convert 1D Array Into 2D Array
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JavaScript includes a variety of built-in functions that allow developers to perform common operations on data, manipulate strings and arrays, and work with dates and times. Here are some examples of built-in functions in JavaScript.
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