Coding Interview Resources
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This channel contains the free resources and solution of coding problems which are usually asked in the interviews.

Managed by: @love_data
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๐Ÿ”ฐ Learn CSS In 20 Days RoadMap
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๐Ÿ”ฐ Java Roadmap for Beginners 2025
โ”œโ”€โ”€ ๐Ÿง  What is Java? Platform Independence & JVM
โ”œโ”€โ”€ โš™๏ธ Setting Up JDK & IDE (IntelliJ / Eclipse)
โ”œโ”€โ”€ ๐Ÿ“„ Java Program Structure & Syntax
โ”œโ”€โ”€ ๐Ÿ”ข Variables, Data Types, Operators
โ”œโ”€โ”€ ๐Ÿ” Control Flow (if, switch, loops)
โ”œโ”€โ”€ ๐Ÿงฑ Arrays & Strings
โ”œโ”€โ”€ ๐Ÿ— Classes, Objects & Constructors
โ”œโ”€โ”€ ๐Ÿง  Inheritance, Polymorphism, Encapsulation
โ”œโ”€โ”€ ๐Ÿ”ง Exception Handling
โ”œโ”€โ”€ ๐Ÿ“ฆ Packages & Access Modifiers
โ”œโ”€โ”€ ๐Ÿงฉ Collections Framework (List, Set, Map)
โ”œโ”€โ”€ โš™๏ธ Multithreading Basics
โ”œโ”€โ”€ ๐Ÿ“‚ File I/O in Java
โ”œโ”€โ”€ ๐Ÿงช Java Projects:
โ”‚ โ”œโ”€โ”€ Student Management System
โ”‚ โ”œโ”€โ”€ Simple Banking App
โ”‚ โ”œโ”€โ”€ To-do List Console App

Free Resources: https://whatsapp.com/channel/0029VamdH5mHAdNMHMSBwg1s
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Here are some of the most popular python project ideas: ๐Ÿ’ก

Simple Calculator
Text-Based Adventure Game
Number Guessing Game
Password Generator
Dice Rolling Simulator
Mad Libs Generator
Currency Converter
Leap Year Checker
Word Counter
Quiz Program
Email Slicer
Rock-Paper-Scissors Game
Web Scraper (Simple)
Text Analyzer
Interest Calculator
Unit Converter
Simple Drawing Program
File Organizer
BMI Calculator
Tic-Tac-Toe Game
To-Do List Application
Inspirational Quote Generator
Task Automation Script
Simple Weather App
Automate data cleaning and analysis (EDA)
Sales analysis
Sentiment analysis
Price prediction
Customer Segmentation
Time series forecasting
Image classification
Spam email detection
Credit card fraud detection
Market basket analysis
NLP, etc

These are just starting points. Feel free to explore, combine ideas, and personalize your projects based on your interest and skills. ๐ŸŽฏ
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Web Development Interview Questions for Freshers

1. What happens when you type a URL in your browser and press Enter?
Answer:

DNS lookup happens to find the IP address

Browser sends an HTTP/HTTPS request to the server

Server processes and sends back HTML/CSS/JS

Browser renders the page using its rendering engine


2. What is the difference between GET and POST requests?
Answer:

GET: Sends data in the URL, used for fetching data

POST: Sends data in the body, used for submitting data securely


3. What is a responsive website?
Answer:
A responsive website adjusts layout and design based on screen size and device (mobile, tablet, desktop), usually using CSS media queries.

4. What is the role of Webpack in web development?
Answer:
Webpack bundles JavaScript files, CSS, and assets into optimized output for faster website loading and better performance.

5. What is the purpose of async and defer in script tags?
Answer:

async: Loads script asynchronously and executes it immediately

defer: Loads script asynchronously but executes after HTML is parsed


6. What is the difference between localStorage and sessionStorage?
Answer:

localStorage: Stores data with no expiration

sessionStorage: Stores data until the browser tab is closed


7. What is CORS?
Answer:
CORS (Cross-Origin Resource Sharing) is a browser security feature that restricts cross-domain API calls unless the server allows it.

8. What is the difference between null and undefined in JavaScript?
Answer:

undefined: A variable declared but not assigned a value

null: A variable explicitly set to have no value


9. How do you optimize website performance?
Answer:

Minify CSS/JS

Compress images

Use lazy loading

Use caching

Reduce HTTP requests

Use a CDN


10. What is the DOM?
Answer:
DOM (Document Object Model) represents the structure of an HTML document as objects, which JavaScript can interact with to change content dynamically.

Credits: https://whatsapp.com/channel/0029VaiSdWu4NVis9yNEE72z/847
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Web Development Interview Questions for Freshers

1. What happens when you type a URL in your browser and press Enter?
Answer:

DNS lookup happens to find the IP address

Browser sends an HTTP/HTTPS request to the server

Server processes and sends back HTML/CSS/JS

Browser renders the page using its rendering engine


2. What is the difference between GET and POST requests?
Answer:

GET: Sends data in the URL, used for fetching data

POST: Sends data in the body, used for submitting data securely


3. What is a responsive website?
Answer:
A responsive website adjusts layout and design based on screen size and device (mobile, tablet, desktop), usually using CSS media queries.

4. What is the role of Webpack in web development?
Answer:
Webpack bundles JavaScript files, CSS, and assets into optimized output for faster website loading and better performance.

5. What is the purpose of async and defer in script tags?
Answer:

async: Loads script asynchronously and executes it immediately

defer: Loads script asynchronously but executes after HTML is parsed


6. What is the difference between localStorage and sessionStorage?
Answer:

localStorage: Stores data with no expiration

sessionStorage: Stores data until the browser tab is closed


7. What is CORS?
Answer:
CORS (Cross-Origin Resource Sharing) is a browser security feature that restricts cross-domain API calls unless the server allows it.

8. What is the difference between null and undefined in JavaScript?
Answer:

undefined: A variable declared but not assigned a value

null: A variable explicitly set to have no value


9. How do you optimize website performance?
Answer:

Minify CSS/JS

Compress images

Use lazy loading

Use caching

Reduce HTTP requests

Use a CDN


10. What is the DOM?
Answer:
DOM (Document Object Model) represents the structure of an HTML document as objects, which JavaScript can interact with to change content dynamically.

Credits: https://whatsapp.com/channel/0029VaiSdWu4NVis9yNEE72z/847
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Web Development Interview Questions Part-2

11. What are semantic HTML elements?
Answer:
Semantic elements clearly describe their meaning in a human- and machine-readable way. Examples: <header>, <footer>, <article>, <nav>.

12. What are HTTP status codes?
Answer:
They indicate the result of an HTTP request.
Common ones:

200 OK (Success)

404 Not Found

500 Internal Server Error

401 Unauthorized

403 Forbidden


13. What is the box model in CSS?
Answer:
The box model includes:

Content

Padding

Border

Margin
It defines how space is taken up around HTML elements.


14. What are pseudo-classes in CSS?
Answer:
Pseudo-classes style elements based on their state.
Examples:

:hover (when mouse is over)

:first-child

:nth-child()


15. How do you make a website SEO-friendly?
Answer:

Use semantic HTML

Add meta tags and alt text

Mobile responsiveness

Fast loading speed

Proper URL structure


16. What is the difference between synchronous and asynchronous in JavaScript?
Answer:

Synchronous: Code runs line by line

Asynchronous: Tasks like API calls don't block other code; use callbacks, promises, or async/await


17. What is a promise in JavaScript?
Answer:
A Promise represents the result of an async operation.
It can be:

Pending

Fulfilled

Rejected


18. What is event bubbling and capturing in JavaScript?
Answer:

Bubbling: Event propagates from child to parent

Capturing: Event goes from parent to child
You can control it using event.stopPropagation()


19. What is a CDN?
Answer:
CDN (Content Delivery Network) delivers static files (images, CSS, JS) via servers closest to the user to improve website speed.

20. What tools do you use for version control?
Answer:
Most common: Git + GitHub
Git tracks changes in code, and GitHub helps you collaborate and manage versions.

Credits: https://whatsapp.com/channel/0029VaiSdWu4NVis9yNEE72z/847
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Complete JavaScript Road Map๐Ÿ”ฅ

A-Z JavaScript๐Ÿ‘‡

1.Variables
โ†ณ var
โ†ณ let
โ†ณ const

2. Data Types
โ†ณ number
โ†ณ string
โ†ณ boolean
โ†ณ null
โ†ณ undefined
โ†ณ symbol

3.Declaring variables
โ†ณ var
โ†ณ let
โ†ณ const

4.Expressions
Primary expressions
โ†ณ this
โ†ณ Literals
โ†ณ []
โ†ณ {}
โ†ณ function
โ†ณ class
โ†ณ function*
โ†ณ async function
โ†ณ async function*
โ†ณ /ab+c/i
โ†ณ string
โ†ณ ( )

Left-hand-side expressions
โ†ณ Property accessors
โ†ณ ?.
โ†ณ new
โ†ณ new .target
โ†ณ import.iss.oneta
โ†ณ super
โ†ณ import()

5.operators
โ†ณ Arithmetic Operators: +, -, *, /, %
โ†ณ Comparison Operators: ==, ===, !=, !==, <, >, <=, >=
โ†ณ Logical Operators: &&, ||, !

6.Control Structures
โ†ณ if
โ†ณ else if
โ†ณ else
โ†ณ switch
โ†ณ case
โ†ณ default

7.Iterations/Loop
โ†ณ do...while
โ†ณ for
โ†ณ for...in
โ†ณ for...of
โ†ณ for await...of
โ†ณ while

8.Functions
โ†ณ Arrow Functions
โ†ณ Default parameters
โ†ณ Rest parameters
โ†ณ arguments
โ†ณ Method definitions
โ†ณ getter
โ†ณ setter

9.Objects and Arrays
โ†ณ Object Literal: { key: value }
โ†ณ Array Literal: [element1, element2, ...]
โ†ณ Object Methods and Properties
โ†ณ Array Methods: push(), pop(), shift(), unshift(),
splice(), slice(), forEach(), map(), filter()

10.Classes and Prototypes
โ†ณ Class Declaration
โ†ณ Constructor Functions
โ†ณ Prototypal Inheritance
โ†ณ extends keyword
โ†ณ super keyword
โ†ณ Private class features
โ†ณ Public class fields
โ†ณ static
โ†ณ Static initialization blocks

11.Error Handling
โ†ณ try,
โ†ณ catch,
โ†ณ finally (exception handling)

ADVANCED CONCEPTS
--------------------------

12.Closures
โ†ณ Lexical Scope
โ†ณ Function Scope
โ†ณ Closure Use Cases

13.Asynchronous JavaScript
โ†ณ Callback Functions
โ†ณ Promises
โ†ณ async/await Syntax
โ†ณ Fetch API
โ†ณ XMLHttpRequest

14.Modules
โ†ณ import and export Statements (ES6 Modules)
โ†ณ CommonJS Modules (require, module.exports)

15.Event Handling
โ†ณ Event Listeners
โ†ณ Event Object
โ†ณ Bubbling and Capturing

16.DOM Manipulation
โ†ณ Selecting DOM Elements
โ†ณ Modifying Element Properties
โ†ณ Creating and Appending Elements

17.Regular Expressions
โ†ณ Pattern Matching
โ†ณ RegExp Methods: test(), exec(), match(), replace()

18.Browser APIs
โ†ณ localStorage and sessionStorage
โ†ณ navigator Object
โ†ณ Geolocation API
โ†ณ Canvas API

19.Web APIs
โ†ณ setTimeout(), setInterval()
โ†ณ XMLHttpRequest
โ†ณ Fetch API
โ†ณ WebSockets

20.Functional Programming
โ†ณ Higher-Order Functions
โ†ณ map(), reduce(), filter()
โ†ณ Pure Functions and Immutability

21.Promises and Asynchronous Patterns
โ†ณ Promise Chaining
โ†ณ Error Handling with Promises
โ†ณ Async/Await

22.ES6+ Features
โ†ณ Template Literals
โ†ณ Destructuring Assignment
โ†ณ Rest and Spread Operators
โ†ณ Arrow Functions
โ†ณ Classes and Inheritance
โ†ณ Default Parameters
โ†ณ let, const Block Scoping

23.Browser Object Model (BOM)
โ†ณ window Object
โ†ณ history Object
โ†ณ location Object
โ†ณ navigator Object

24.Node.js Specific Concepts
โ†ณ require()
โ†ณ Node.js Modules (module.exports)
โ†ณ File System Module (fs)
โ†ณ npm (Node Package Manager)

25.Testing Frameworks
โ†ณ Jasmine
โ†ณ Mocha
โ†ณ Jest

------------------- END-------------------

Some Good Resources To Learn JavaScript
1.Documentation

Mozilla MDN Web Docs
developer.mozilla.org/en-US/docs/Webโ€ฆ
DevDocs
devdocs.io/javascript/

2. Useful Channel's

Javascript Courses: https://t.iss.one/javascript_courses
Programming Resources: https://t.iss.one/programming_guide
FreeCodeCamp: youtube.com/c/FreeCodeCamp

Hope it helps ๐Ÿ˜Š๐ŸŒฑ
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Understanding Python's Slice Function
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๐Ÿ ๐๐ฒ๐ญ๐ก๐จ๐ง ๐Ÿ๐ž๐ฅ๐ญ ๐ข๐ฆ๐ฉ๐จ๐ฌ๐ฌ๐ข๐›๐ฅ๐ž ๐š๐ญ ๐Ÿ๐ข๐ซ๐ฌ๐ญ, ๐›๐ฎ๐ญ ๐ญ๐ก๐ž๐ฌ๐ž ๐Ÿ— ๐ฌ๐ญ๐ž๐ฉ๐ฌ ๐œ๐ก๐š๐ง๐ ๐ž๐ ๐ž๐ฏ๐ž๐ซ๐ฒ๐ญ๐ก๐ข๐ง๐ !
.
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1๏ธโƒฃ ๐Œ๐š๐ฌ๐ญ๐ž๐ซ๐ž๐ ๐ญ๐ก๐ž ๐๐š๐ฌ๐ข๐œ๐ฌ: Started with foundational Python concepts like variables, loops, functions, and conditional statements.

2๏ธโƒฃ ๐๐ซ๐š๐œ๐ญ๐ข๐œ๐ž๐ ๐„๐š๐ฌ๐ฒ ๐๐ซ๐จ๐›๐ฅ๐ž๐ฆ๐ฌ: Focused on beginner-friendly problems on platforms like LeetCode and HackerRank to build confidence.

3๏ธโƒฃ ๐…๐จ๐ฅ๐ฅ๐จ๐ฐ๐ž๐ ๐๐ฒ๐ญ๐ก๐จ๐ง-๐’๐ฉ๐ž๐œ๐ข๐Ÿ๐ข๐œ ๐๐š๐ญ๐ญ๐ž๐ซ๐ง๐ฌ: Studied essential problem-solving techniques for Python, like list comprehensions, dictionary manipulations, and lambda functions.

4๏ธโƒฃ ๐‹๐ž๐š๐ซ๐ง๐ž๐ ๐Š๐ž๐ฒ ๐‹๐ข๐›๐ซ๐š๐ซ๐ข๐ž๐ฌ: Explored popular libraries like Pandas, NumPy, and Matplotlib for data manipulation, analysis, and visualization.

5๏ธโƒฃ ๐…๐จ๐œ๐ฎ๐ฌ๐ž๐ ๐จ๐ง ๐๐ซ๐จ๐ฃ๐ž๐œ๐ญ๐ฌ: Built small projects like a to-do app, calculator, or data visualization dashboard to apply concepts.

6๏ธโƒฃ ๐–๐š๐ญ๐œ๐ก๐ž๐ ๐“๐ฎ๐ญ๐จ๐ซ๐ข๐š๐ฅ๐ฌ: Followed creators like CodeWithHarry and Shradha Khapra for in-depth Python tutorials.

7๏ธโƒฃ ๐ƒ๐ž๐›๐ฎ๐ ๐ ๐ž๐ ๐‘๐ž๐ ๐ฎ๐ฅ๐š๐ซ๐ฅ๐ฒ: Made it a habit to debug and analyze code to understand errors and optimize solutions.

8๏ธโƒฃ ๐‰๐จ๐ข๐ง๐ž๐ ๐Œ๐จ๐œ๐ค ๐‚๐จ๐๐ข๐ง๐  ๐‚๐ก๐š๐ฅ๐ฅ๐ž๐ง๐ ๐ž๐ฌ: Participated in coding challenges to simulate real-world problem-solving scenarios.

9๏ธโƒฃ ๐’๐ญ๐š๐ฒ๐ž๐ ๐‚๐จ๐ง๐ฌ๐ข๐ฌ๐ญ๐ž๐ง๐ญ: Practiced daily, worked on diverse problems, and never skipped Python for more than a day.

I have curated the best interview resources to crack Python Interviews ๐Ÿ‘‡๐Ÿ‘‡
https://whatsapp.com/channel/0029VaiM08SDuMRaGKd9Wv0L

Hope you'll like it

Like this post if you need more resources like this ๐Ÿ‘โค๏ธ

#Python
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