Webdevelopment657

ATS Score : 92+

How does “import” and “export” work in JavaScript?
68. What is a Proxy object in JavaScript?
69. Explain the difference between “var,” “let,” and “const” scope.
70. How do you flatten an array in JavaScript?
71. What are IIFE (Immediately Invoked Function Expressions)?
72. What is the purpose of the “setTimeout” and “setInterval” functions?
73. Explain the concept of polyfills in JavaScript.
74. What is a WeakMap in JavaScript, and how is it different from a Map?
75. How do you handle data binding in JavaScript?
76. What is the purpose of the “every” and “some” methods in JavaScript arrays?
77. Explain the difference between “==” and “===” in JavaScript.
78. How do you remove properties from an object in JavaScript?
79. What is the purpose of the “Object.freeze” method?
80. How do you check if an object is empty in JavaScript?
81. Explain the concept of throttling in JavaScript.
82. What is a WeakSet in JavaScript?
83. How does JavaScript’s garbage collection work?
84. What is debouncing in JavaScript, and how is it different from throttling?
85. What is the purpose of the “Object.assign” method?
86. Explain the difference between map, filter, and reduce.
87. How do you handle inheritance in JavaScript?
88. What is the difference between synchronous and asynchronous functions?
89. How does the “async” keyword work with functions?
90. What are JavaScript decorators?
91. Explain how to optimize JavaScript code for performance.
92. What is a service worker in JavaScript?
93. How do you use “try...catch” for error handling in JavaScript?
94. Explain how promises can be chained.
95. What are the benefits of using closures in JavaScript?
96. How can you reverse a string in JavaScript?
97. What is a Set in JavaScript?
98. Explain the concept of promises with async/await.
99. How do you use “Object.keys,” “Object.values,” and “Object.entries” in JavaScript?
100. What is the purpose of “Promise.all” in JavaScript?

This list provides a comprehensive overview of JavaScript concepts, making it useful for interview preparation.

Join @webdeveloper657 for more! ✅

ENJOY LEARNING 👍👍

Coders Learning:
Here’s the complete list of 100 JavaScript interview questions:

1. What is JavaScript?
2. What are the data types in JavaScript?
3. What is the difference between null and undefined?
4. Explain the concept of hoisting in JavaScript.
5. What is a closure in JavaScript?
6. What is the difference between “==” and “===” operators in JavaScript?
7. Explain the concept of prototypal inheritance in JavaScript.
8. What are the different ways to define a function in JavaScript?
9. How does event delegation work in JavaScript?
10. What is the purpose of the “this” keyword in JavaScript?
11. What are the different ways to create objects in JavaScript?
12. Explain the concept of callback functions in JavaScript.
13. What is event bubbling and event capturing in JavaScript?
14. What is the purpose of the “bind” method in JavaScript?
15. Explain the concept of AJAX in JavaScript.
16. What is the “typeof” operator used for?
17. How does JavaScript handle errors and exceptions?
18. Explain the concept of event-driven programming in JavaScript.
19. What is the purpose of the “async” and “await” keywords in JavaScript?
20. What is the difference between a deep copy and a shallow copy in JavaScript?
21. How does JavaScript handle memory management?
22. Explain the concept of the event loop in JavaScript.
23. What is the purpose of the “map” method in JavaScript?
24. What is a promise in JavaScript?
25. How do you handle errors in promises?
26. Explain the concept of currying in JavaScript.
27. What is the purpose of the “reduce” method in JavaScript?
28. What is the difference between “null” and “undefined” in JavaScript?
29. What are the different types of loops in JavaScript?
30. What is the difference between “let,” “const,” and “var” in JavaScript?
31. Explain the concept of event propagation in JavaScript.
32. What are the different ways to manipulate the DOM in JavaScript?
33. What is the purpose of the “localStorage” and “sessionStorage” objects?
34. How do you handle asynchronous operations in JavaScript?
35. What is the purpose of the “forEach” method in JavaScript?
36. What are the differences between “let” and “var” in JavaScript?
37. Explain the concept of memoization in JavaScript.
38. What is the purpose of the “splice” method in JavaScript arrays?
39. What is a generator function in JavaScript?
40. How does JavaScript handle variable scoping?
41. What is the purpose of the “split” method in JavaScript?
42. What is the difference between a deep clone and a shallow clone of an object?
43. Explain the concept of the event delegation pattern.
44. What are the differences between JavaScript’s “null” and “undefined”?
45. What is the purpose of the “arguments” object in JavaScript?
46. What are the different ways to define methods in JavaScript objects?
47. Explain the concept of memoization and its benefits.
48. What is the difference between “slice” and “splice” in JavaScript arrays?
49. What is the purpose of the “apply” and “call” methods in JavaScript?
50. Explain the concept of the event loop in JavaScript and how it handles asynchronous operations.
51. What are arrow functions, and how are they different from regular functions?
52. What is the purpose of the “filter” method in JavaScript?
53. Explain the concept of destructuring in JavaScript.
54. What is a callback hell, and how can it be avoided?
55. What are “promises,” and how do they work in JavaScript?
56. Explain the difference between synchronous and asynchronous JavaScript.
57. What is JSON, and how is it used in JavaScript?
58. How can you remove duplicates from an array in JavaScript?
59. What is the purpose of the “includes” method in JavaScript?
60. How do you handle default values in JavaScript functions?
61. What are template literals, and how are they used?
62. Explain the concept of modules in JavaScript.
63. What is CORS, and why is it important?
64. What is the “fetch” API, and how does it work?
65. Explain the concept of immutability in JavaScript.
66. What is the purpose of the “find” method in JavaScript arrays?
67.

Part 1: Essential Tools & Learning Resources For Developers🔥

📚 Documentation & Cheat Sheets
- MDN Web Docs: Complete guide to HTML, CSS, JavaScript, and more.
- DevDocs: Searchable docs covering major languages and frameworks.
- Cheatography: Cheat sheets for quick language and library reference.

🎨 Design & Inspiration
- Dribbble & Behance: UI inspiration galleries for app and website design.
- Coolors.co: Color palette generator for choosing color schemes.
- FontAwesome: Free icon sets for projects.
- Unsplash: Free, high-quality images for personal or commercial use.

🛠 Code Editors & IDEs
- Visual Studio Code: Popular, customizable editor with extensive extensions.
- CodeSandbox: Online code editor perfect for quick prototyping.
- Repl.it: Real-time collaborative coding platform supporting many languages.

💻 Frontend Libraries & Frameworks
- React: Declarative, component-based UI library.
- Vue.js: Lightweight framework for building interactive UIs.
- Bootstrap & TailwindCSS: CSS frameworks for responsive design.

🖥 Backend & APIs
- Express.js: Minimal and flexible Node.js framework for backend.
- Django: Python framework with a built-in admin interface and ORM.
- Postman: Tool for building and testing APIs.

React ❤️  to this Message for Part 2     

Thanks For Joining All ❤️🙏

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Here are 20 essential VS Code shortcuts for beginners:

1. Ctrl + P: Open any file quickly 📂

2. Ctrl + /: Toggle line comment 📝

3. Alt + Up/Down: Move a line up or down ↕️

4. Ctrl + Shift + K: Delete the current line ❌

5. Ctrl + B: Show/hide the sidebar 📚

6. Ctrl + Space: Trigger IntelliSense for code suggestions 💡

7. Ctrl + Shift + F: Search across files 🔍

8. Ctrl + D: Select the next occurrence of the selected text 📑

9. Ctrl + Shift + L: Select all occurrences of the current selection 🔗

10. Ctrl + Shift + P: Open the Command Palette 📜

11. Ctrl + F2: Rename all occurrences of a variable ✏️

12. Ctrl + J: Show/hide the integrated terminal 💻

13. Ctrl + `: Open a new terminal 🔧

14. Ctrl + Shift + N: Open a new window 🖼️

15. Ctrl + W: Close the current editor tab 🗂️

16. Ctrl + Shift + E: Focus on the file explorer 🗃️

17. Ctrl + Shift + G: Open the Git view 🔄

18. Ctrl + Shift + M: Open the Problems panel 🚨

19. Alt + Shift + Up/Down: Copy the line up or down 📋

20. Ctrl + Alt + Arrow keys: Split the editor window ✂️


Master these and level up your coding speed! 🚀

📌Save Your time with this Short Cuts

Ctrl + A - Select All
Ctrl + B - Bold
Ctrl + C - Copy
Ctrl + D - Fill
Ctrl + F - Find
Ctrl + G - Find next instance of text
Ctrl + H - Replace
Ctrl + I - Italic
Ctrl + K - Insert a hyperlink
Ctrl + N - New workbook
Ctrl + O - Open
Ctrl + P - Print
Ctrl + R - Nothing right
Ctrl + S - Save
Ctrl + U - Underlined
Ctrl + V - Paste
Ctrl W - Close
Ctrl + X - Cut
Ctrl + Y - Repeat
Ctrl + Z - Cancel
F1 - Help
F2 - Edition
F3 - Paste the name
F4 - Repeat the last action
F5 - Goto
F6 - Next Pane
F7 - Spell Check
F8 - Extension of the mode
F9 - Recalculate all workbooks
F10 - Activate Menubar
F11 - New graph
F12 - Save As
Shift + F1 - What is it?
Shift + F2 - Edit cell comment
Shift + F3 - Paste the function into the formula
Shift + F4 - Search Next
Shift + F5 - Find
Shift + F6 - Previous Panel
Shift + F8 - Add to the selection
Shift + F9 - Calculate the active worksheet
Shift + F10 - Popup menu display
Shift + F11 - New spreadsheet
Shift + F12 - Save
Ctrl + F3 - Set name
Ctrl + F4 - Close
Ctrl + F5 - XL, size of the restore window
Ctrl + F6 - Next Workbook Window
Shift + Ctrl + F6 - Previous Workbook Window
Ctrl + F7 - Move window
Ctrl + F8 - Resize Window
Ctrl + F9 - Minimize the workbook
Ctrl + F10 - Maximize or Restore Window
Ctrl + F11 - Inset 4.0 Macro sheet
Ctrl + F1 - Open File
Alt + F1 - Insert a graph
Alt + F2 - Save As
Alt + F4 - Output
Alt + F8 - Macro dialog
Alt + F11 - Visual Basic Editor
Ctrl + Shift + F3 - Create a name using the names of row and column labels
Ctrl + Shift + F6 - Previous Window
Ctrl + Shift + F12 - Printing
Alt + Shift + F1 - New spreadsheet
Alt + Shift + F2 - Save
Alt + = - AutoSum
Ctrl + `- Toggle value / display of the formula
Ctrl + Shift + A - Insert the argument names in the formula
Alt + down arrow - automatic view list
Alt + '- Format Style Dialog
Ctrl + Shift + ~ - General Format

KEEP LEARNING 👍👍

Javascript Cheatsheet ✨️

Roadmap to Become Web3 Developer :

📂 Learn HTML
∟📂 Learn CSS
∟📂 Learn JavaScript
∟📂 Learn React
∟📂 Learn Solidity
∟📂 Learn Ether.js
∟📂 Learn L2
∟📂 Build Projects
∟ ✅ Start Applying for Job’s

15+ Must Watch Movies for Programmers🧑‍💻🤖

1. The Matrix
2. The Social Network
3. Source Code
4. The Imitation Game
5. Silicon Valley
6. Mr. Robot
7. Jobs
8. The Founder
9. The Social Dilemma
10. The Great Hack
11. Halt and Catch Fire
12. Wargames
13. Hackers
14. Snowden
15. Who Am I

Happy Coding ♥️

Master Javascript :

The JavaScript Tree 👇
|
|── Variables
| ├── var
| ├── let
| └── const
|
|── Data Types
| ├── String
| ├── Number
| ├── Boolean
| ├── Object
| ├── Array
| ├── Null
| └── Undefined
|
|── Operators
| ├── Arithmetic
| ├── Assignment
| ├── Comparison
| ├── Logical
| ├── Unary
| └── Ternary (Conditional)
||── Control Flow
| ├── if statement
| ├── else statement
| ├── else if statement
| ├── switch statement
| ├── for loop
| ├── while loop
| └── do-while loop
|
|── Functions
| ├── Function declaration
| ├── Function expression
| ├── Arrow function
| └── IIFE (Immediately Invoked Function Expression)
|
|── Scope
| ├── Global scope
| ├── Local scope
| ├── Block scope
| └── Lexical scope
||── Arrays
| ├── Array methods
| | ├── push()
| | ├── pop()
| | ├── shift()
| | ├── unshift()
| | ├── splice()
| | ├── slice()
| | └── concat()
| └── Array iteration
| ├── forEach()
| ├── map()
| ├── filter()
| └── reduce()|
|── Objects
| ├── Object properties
| | ├── Dot notation
| | └── Bracket notation
| ├── Object methods
| | ├── Object.keys()
| | ├── Object.values()
| | └── Object.entries()
| └── Object destructuring
||── Promises
| ├── Promise states
| | ├── Pending
| | ├── Fulfilled
| | └── Rejected
| ├── Promise methods
| | ├── then()
| | ├── catch()
| | └── finally()
| └── Promise.all()
|
|── Asynchronous JavaScript
| ├── Callbacks
| ├── Promises
| └── Async/Await
|
|── Error Handling
| ├── try...catch statement
| └── throw statement
|
|── JSON (JavaScript Object Notation)
||── Modules
| ├── import
| └── export
|
|── DOM Manipulation
| ├── Selecting elements
| ├── Modifying elements
| └── Creating elements
|
|── Events
| ├── Event listeners
| ├── Event propagation
| └── Event delegation
|
|── AJAX (Asynchronous JavaScript and XML)
|
|── Fetch API
||── ES6+ Features
| ├── Template literals
| ├── Destructuring assignment
| ├── Spread/rest operator
| ├── Arrow functions
| ├── Classes
| ├── let and const
| ├── Default parameters
| ├── Modules
| └── Promises
|
|── Web APIs
| ├── Local Storage
| ├── Session Storage
| └── Web Storage API
|
|── Libraries and Frameworks
| ├── React
| ├── Angular
| └── Vue.js
||── Debugging
| ├── Console.log()
| ├── Breakpoints
| └── DevTools
|
|── Others
| ├── Closures
| ├── Callbacks
| ├── Prototypes
| ├── this keyword
| ├── Hoisting
| └── Strict mode
|
| END __