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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Red:📈 Análisis del canal de Telegram Coding Interview Resources
El canal Coding Interview Resources (@crackingthecodinginterview) en el segmento lingüístico de Inglés es un actor destacado. Actualmente la comunidad reúne a 52 091 suscriptores, ocupando la posición 2 543 en la categoría Tecnologías y Aplicaciones y el puesto 6 857 en la región India.
📊 Métricas de audiencia y dinámica
Desde su creación el невідомо, el proyecto ha mostrado un crecimiento acelerado, reuniendo a 52 091 suscriptores.
Según los últimos datos del 13 julio, 2026, el canal mantiene una actividad estable. En los últimos 30 días la variación de miembros fue de -73, y en las últimas 24 horas de -13, conservando un alto alcance.
- Estado de verificación: No verificado
- Tasa de interacción (ER): El promedio de interacción de la audiencia es 1.79%. Durante las primeras 24 horas tras publicar, el contenido suele obtener 0.81% de reacciones respecto al total de suscriptores.
- Alcance de las publicaciones: Cada publicación recibe en promedio 933 visualizaciones. En el primer día suele acumular 423 visualizaciones.
- Reacciones e interacción: La audiencia responde de forma activa: el promedio de reacciones por publicación es 2.
- Intereses temáticos: El contenido se centra en temas clave como array, stack, algorithm, programming, sort.
📝 Descripción y política de contenido
El autor describe el recurso como un espacio para expresar opiniones subjetivas:
“This channel contains the free resources and solution of coding problems which are usually asked in the interviews.
Managed by: @love_data”
Gracias a la alta frecuencia de actualizaciones (últimos datos recibidos el 14 julio, 2026), el canal mantiene la vigencia y un amplio alcance. La analítica demuestra que la audiencia interactúa activamente con el contenido, lo que lo convierte en un punto de referencia dentro de la categoría Tecnologías y Aplicaciones.
52 091
Suscriptores
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+17 días
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Carga de datos en curso...
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Publicaciones del Canal
20 GitHub repos that teach you more than any paid course
1.30-Days-Of-Python — http://github.com/Asabeneh/30-Days-Of-Python
Structured 30-day path, beginner to writing real scripts.
2. project-based-learning — http://github.com/practical-tutorials/project-based-learning
Huge collection of step-by-step build tutorials across languages.
3. build-your-own-x — http://github.com/codecrafters-io/build-your-own-x
Build your own Docker, Redis, git, etc. from scratch. 400k+ stars.
4. ML-For-Beginners — http://github.com/microsoft/ML-For-Beginners
Microsoft's free ML course with quizzes & assignments.
5. 500-AI-Machine-learning-Deep-learning-Computer-vision-NLP-Projects-with-code — http://github.com/ashishpatel26/500-AI-Machine-learning-Deep-learning-Computer-vision-NLP-Projects-with-code
500 project ideas across AI/ML/CV/NLP.
6. freeCodeCamp — http://github.com/freeCodeCamp/freeCodeCamp
Full curriculum: web dev, JS algorithms, data science, more.
7. developer-roadmap— http://github.com/kamranahmedse/developer-roadmap
Visual roadmaps for every dev role — frontend, backend, DevOps.
8. coding-interview-university — http://github.com/jwasham/coding-interview-university
Full CS study plan to prep for software engineering interviews.
9. system-design-primer — http://github.com/donnemartin/system-design-primer
Learn how to design large-scale systems, with real examples.
10. javascript-algorithms — http://github.com/trekhleb/javascript-algorithms
Algorithms & data structures explained and implemented in JS.
11. You-Dont-Know-JS — http://github.com/getify/You-Dont-Know-JS
Deep-dive book series on how JavaScript actually works.
12. clean-code-javascript — http://github.com/ryanmcdermott/clean-code-javascript
Clean code principles adapted for JS with real examples.
13. public-apis — http://github.com/public-apis/public-apis
Free APIs for literally any project idea you have.
14. free-programming-books — http://github.com/EbookFoundation/free-programming-books
Massive list of free books across every language and stack.
15. ossu/computer-science — http://github.com/ossu/computer-science
Full free CS degree curriculum, self-paced.
16. app-ideas — http://github.com/florinpop17/app-ideas
Curated project ideas with difficulty levels to build a portfolio.
17. awesome-python — http://github.com/vinta/awesome-python
Every notable Python framework, library, and resource in one place.
18. awesome-machine-learning — http://github.com/josephmisiti/awesome-machine-learning
Curated ML frameworks and resources by language.
19. tech-interview-handbook — http://github.com/yangshun/tech-interview-handbook
Curated interview prep material used by real candidates who got hired.
20. awesome — http://github.com/sindresorhus/awesome
The meta-list. Every "awesome" list for every topic that exists.
Do not forget to React ❤️ to this message for more content like this 👇
Thanks for joining all 💙🙏
| 2 | ✅𝗖𝗼𝗿𝗿𝗲𝗰𝘁 𝘄𝗮𝘆 𝘁𝗼 𝗮𝘀𝗸 𝗳𝗼𝗿 𝗮 𝗿𝗲𝗳𝗲𝗿𝗿𝗮𝗹:👩💻
---
Subject: Referral Request for [Position] at [Company Name]
Hi [Recipient's Name]🙂,
I hope you’re doing well. I’m interested in the [Position] at [Company] and noticed you work there. My background in data analytics, particularly in [specific expertise], aligns well with this role.
I understand the interviews will likely focus heavily on technical data analysis skills, and I’m well-prepared, having worked on numerous projects and effectively used data-driven strategies to address complex challenges.
Here are the details for your reference:
- Job posting: [Job Link]
- Resume: [Resume Link]
- Projects and coding profile:
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I assure you that a referral will be highly valued and I will make the most of this opportunity. I’m also happy to assist you with anything in return.
Any additional suggestion/advice you can provide would be greatly appreciated.
Thanks in advance!
Best,
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| 3 |  🚀 𝗧𝗼𝗽 𝟱 𝗦𝗸𝗶𝗹𝗹𝘀 𝗧𝗼 𝗠𝗮𝘀𝘁𝗲𝗿 𝗜𝗻 𝟮𝟬𝟮𝟲 – 𝗘𝗻𝗿𝗼𝗹𝗹 𝗙𝗼𝗿 𝗙𝗥𝗘𝗘! 🎓
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| 4 | 🚀 Programming Skills That Companies Actually Want 👨💻🔥
🧠 1. Problem Solving
✔ Logical Thinking
✔ Debugging Skills
✔ DSA Basics
✔ Writing Efficient Code
⌨️ 2. Strong Programming Fundamentals
✔ Variables & Functions
✔ OOP Concepts
✔ APIs & JSON
✔ Error Handling
🐍 3. Popular Languages to Learn
✔ Python → AI & Automation
✔ JavaScript → Web Development
✔ Java → Enterprise Apps
✔ C++ → System Programming
🌐 4. Web Development Skills
✔ Frontend Basics
✔ Backend APIs
✔ Databases
✔ Authentication Systems
🛠 Frameworks to Learn:
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✔ Node.js
✔ Django
✔ Spring Boot
📂 5. Version Control & Collaboration
✔ Git Basics
✔ Team Collaboration
✔ Pull Requests
✔ Open Source Contributions
🛠 Tools to Learn:
✔ Git
✔ GitHub
⚡ 6. Database Skills
✔ SQL Queries
✔ Database Design
✔ Query Optimization
✔ CRUD Operations
🛠 Databases to Learn:
✔ MySQL
✔ PostgreSQL
✔ MongoDB
☁️ 7. Cloud & Deployment Basics
✔ Hosting Applications
✔ APIs Deployment
✔ Docker Basics
✔ CI/CD Concepts
🛠 Platforms to Learn:
✔ Docker
✔ AWS
✔ Vercel
🔥 8. Build Real Projects
✔ Portfolio Website
✔ Chat Application
✔ AI Projects
✔ E-commerce App
✔ Dashboard Projects
💡 Companies don’t hire based on certificates only… they hire people who can build real solutions.
💬 Tap ❤️ if this helped you! | 590 |
| 5 |  🚀 𝗣𝗮𝘆 𝗔𝗳𝘁𝗲𝗿 𝗣𝗹𝗮𝗰𝗲𝗺𝗲𝗻𝘁 𝗣𝗿𝗼𝗴𝗿𝗮𝗺 - 𝗟𝗮𝘂𝗻𝗰𝗵 𝗬𝗼𝘂𝗿 𝗧𝗲𝗰𝗵 𝗖𝗮𝗿𝗲𝗲𝗿
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Hurry! Limited seats are available.🏃♂️ | 528 |
| 6 |  🎓 𝗧𝗼𝗽 𝗖𝗼𝗺𝗽𝗮𝗻𝗶𝗲𝘀 𝗢𝗳𝗳𝗲𝗿𝗶𝗻𝗴 𝗙𝗥𝗘𝗘 𝗖𝗲𝗿𝘁𝗶𝗳𝗶𝗰𝗮𝘁𝗶𝗼𝗻 𝗖𝗼𝘂𝗿𝘀𝗲𝘀 𝗶𝗻 𝟮𝟬𝟮𝟲
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🚀 Don't miss these FREE certification opportunities in 2026! | 588 |
| 7 |  Cheat sheet on Python Frameworks:
Django: A full-featured web framework with built-in ORM, admin panel, and security features.
Flask: A lightweight microframework with a minimal set of features and high flexibility.
ORM & Admin: Built-in to Django, but need to be connected separately in Flask.
Security: Django has built-in security mechanisms, while in Flask, they need to be configured manually.
Testing: Django offers built-in testing tools, while Flask relies on third-party libraries.
Use Cases: Django is suitable for large and complex projects, while Flask is better for small applications, APIs, and prototypes. | 609 |
| 8 |  𝗠𝗮𝘀𝘁𝗲𝗿 𝗧𝗵𝗲𝘀𝗲 𝗛𝗶𝗴𝗵-𝗗𝗲𝗺𝗮𝗻𝗱 𝗦𝗸𝗶𝗹𝗹𝘀 𝘁𝗼 𝗟𝗮𝗻𝗱 𝗛𝗶𝗴𝗵-𝗣𝗮𝘆𝗶𝗻𝗴 𝗝𝗼𝗯𝘀 🔥
This guide highlights 3 powerful skills that are opening doors to high-paying roles across tech and business .🎓
Perfect For
👨🎓 Students
💼 Freshers
📈 Job seekers trying to improve employability
🚀 Anyone who wants to build a future-proof career with better salary potential
🔗 𝗘𝗻𝗿𝗼𝗹𝗹 𝗙𝗼𝗿 𝗙𝗥𝗘𝗘👇:
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🚀 Start learning today. Build in-demand skills. Position yourself for better opportunities and bigger career growth. | 713 |
| 9 |  🚀 Want to master AI Agents
Here are 20 must-know AI Agent Concepts – explained simply and visually!
From Reflex Agents to ReAct, Tools to Learning Loops — this post is your quick guide to understanding how autonomous agents work in real-world applications. | 727 |
| 10 |  𝗠𝗶𝗰𝗿𝗼𝘀𝗼𝗳𝘁 𝗙𝗥𝗘𝗘 𝗟𝗲𝗮𝗿𝗻𝗶𝗻𝗴 𝗥𝗲𝘀𝗼𝘂𝗿𝗰𝗲𝘀🎓
Offers a wide range of free learning resources through Microsoft Learn, helping students, freshers, and professionals build job-ready skills at their own pace.
✅ 100% FREE self-paced learning modules
✅ Official learning platform from Microsoft
🔗 𝗘𝗻𝗿𝗼𝗹𝗹 𝗙𝗼𝗿 𝗙𝗥𝗘𝗘👇:
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Explore Microsoft’s free resources. Build in-demand skills and make your profile stronger. | 733 |
| 11 |  𝗔𝗜 𝗶𝗻 𝗣𝗿𝗼𝗱𝘂𝗰𝘁 𝗠𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁 𝗙𝗥𝗘𝗘 𝗢𝗻𝗹𝗶𝗻𝗲 𝗠𝗮𝘀𝘁𝗲𝗿𝗰𝗹𝗮𝘀𝘀 😍
💫 Join this live masterclass and gain practical insights into AI-powered Product Management, in-demand skills
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Eligibility :- Recent Graduates & Working Professionals
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( Limited Slots ..Hurry Up )
Date & Time :- 11th July 2026 , 8:00 PM (IST) | 741 |
| 12 | Java coding interview questions
1. Reverse a String:
Write a Java program to reverse a given string.
2. Find the Largest Element in an Array:
Find and print the largest element in an array.
3. Check for Palindrome:
Determine if a given string is a palindrome (reads the same backward as forward).
4. Factorial Calculation:
Write a function to calculate the factorial of a number.
5. Fibonacci Series:
Generate the first n numbers in the Fibonacci sequence.
6. Check for Prime Number:
Write a program to check if a given number is prime.
7. String Anagrams:
Determine if two strings are anagrams of each other.
8. Array Sorting:
Implement sorting algorithms like bubble sort, merge sort, or quicksort.
9. Binary Search:
Implement a binary search algorithm to find an element in a sorted array.
10. Duplicate Elements in an Array:
Find and print duplicate elements in an array.
11. Linked List Reversal:
Reverse a singly-linked list.
12. Matrix Operations:
Perform matrix operations like addition, multiplication, or transpose.
13. Implement a Stack:
Create a stack data structure and implement basic operations (push, pop).
14. Implement a Queue:
Create a queue data structure and implement basic operations (enqueue, dequeue).
15. Inheritance and Polymorphism:
Implement a class hierarchy with inheritance and demonstrate polymorphism.
16. Exception Handling:
Write code that demonstrates the use of try-catch blocks to handle exceptions.
17. File I/O:
Read from and write to a file using Java's file I/O capabilities.
18. Multithreading:
Create a simple multithreaded program and demonstrate thread synchronization.
19. Lambda Expressions:
Use lambda expressions to implement functional interfaces.
20. Recursive Algorithms:
Solve a problem using recursion, such as computing the factorial or Fibonacci sequence.
Best Java Resources: https://whatsapp.com/channel/0029VamdH5mHAdNMHMSBwg1s
Like for more ❤️ | 712 |
| 13 |  𝗙𝗥𝗘𝗘 𝗩𝗶𝗿𝘁𝘂𝗮𝗹 𝗖𝗲𝗿𝘁𝗶𝗳𝗶𝗰𝗮𝘁𝗲 𝗜𝗻𝘁𝗲𝗿𝗻𝘀𝗵𝗶𝗽𝘀 | 𝗕𝗼𝗼𝘀𝘁 𝗬𝗼𝘂𝗿 𝗥𝗲𝘀𝘂𝗺𝗲🎓
These FREE virtual certificate internships can help you build practical skills, industry exposure, and resume value from top companies and global platforms — all from home.
💫Perfect for students, freshers, and career starters
- PwC Power BI Virtual Internship
- British Airways Data Science Virtual Internship
- Quantium Data Analytics Virtual Internship
🔗 𝗘𝗻𝗿𝗼𝗹𝗹 𝗙𝗼𝗿 𝗙𝗥𝗘𝗘👇:
https://pdlink.in/44PEjcL
🚀 Start learning today. Build experience. Collect certificates. Make your resume stronger. | 788 |
| 14 | 🧠 SQL Interview Question (Commonly Asked)
📌
products(product_id, product_name, category_id, price)
❓ Ques :
👉 Find the second highest priced product in each category.
🧩 How Interviewers Expect You to Think
• Partition data by category
• Rank products based on price (descending)
• Understand difference between RANK, DENSE_RANK, and ROW_NUMBER
• Handle ties properly
• Filter after ranking logic
💡 SQL Solution
WITH ranked_products AS (
SELECT
product_id,
product_name,
category_id,
price,
DENSE_RANK() OVER (
PARTITION BY category_id
ORDER BY price DESC
) AS price_rank
FROM products
)
SELECT
product_id,
product_name,
category_id,
price
FROM ranked_products
WHERE price_rank = 2;
🔥 Why this question is powerful:
• Tests window functions deeply
• Checks ranking logic understanding
• Very common in Data Analyst interviews
❤️ React if you want more scenario-based SQL questions | 801 |
| 15 |  📊 𝗗𝗮𝘁𝗮 𝗔𝗻𝗮𝗹𝘆𝘁𝗶𝗰𝘀 𝗙𝗥𝗘𝗘 𝗖𝗲𝗿𝘁𝗶𝗳𝗶𝗰𝗮𝘁𝗶𝗼𝗻 𝗖𝗼𝘂𝗿𝘀𝗲𝘀 🚀
✅ 100% FREE learning opportunities
✅ Great for students, freshers, and beginners
✅ Help you build a stronger resume with recognized names like Cisco, Google, and Microsoft
✅ Useful for analytics internships, off-campus drives, and fresher hiring
🔗 𝗘𝗻𝗿𝗼𝗹𝗹 𝗙𝗼𝗿 𝗙𝗥𝗘𝗘👇:
https://pdlink.in/4eRA6eF
🚀 Start learning today. Build your analytics foundation. Earn free certifications. Move one step closer to your Data Analyst career. | 800 |
| 16 | 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 __ | 839 |
| 17 |  🎓 𝗧𝗼𝗽 𝟱 𝗙𝗥𝗘𝗘 𝗖𝗼𝘂𝗿𝘀𝗲𝘀 𝗧𝗼 𝗜𝗺𝗽𝗿𝗼𝘃𝗲 𝗬𝗼𝘂𝗿 𝗦𝗸𝗶𝗹𝗹𝘀𝗲𝘁 🚀
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📌 Save this post and share it with friends looking to upskill in 2026. | 620 |
| 18 | ✅ Data Science: Tools You Should Know as a Beginner 🧰📊
Mastering these tools helps you build real-world data projects faster and smarter:
1️⃣ Python
✔ Most popular language in data science
✔ Libraries: NumPy, Pandas, Scikit-learn, Matplotlib, Seaborn
📌 Use: Data cleaning, EDA, modeling, automation
2️⃣ Jupyter Notebook
✔ Interactive coding environment
✔ Great for documentation + visualization
📌 Use: Prototyping & explaining models
3️⃣ SQL
✔ Essential for querying databases
📌 Use: Data extraction, filtering, joins, aggregations
4️⃣ Excel / Google Sheets
✔ Quick analysis & reports
📌 Use: Data exploration, pivot tables, charts
5️⃣ Power BI / Tableau
✔ Drag-and-drop dashboards
📌 Use: Visual storytelling & business insights
6️⃣ Git & GitHub
✔ Track code changes + collaborate
📌 Use: Version control, building your portfolio
7️⃣ Scikit-learn
✔ Ready-to-use ML models
📌 Use: Classification, regression, model evaluation
8️⃣ Google Colab / Kaggle Notebooks
✔ Free, cloud-based Python environment
📌 Use: Practice & run notebooks without setup
🧠 Bonus:
• VS Code – for scalable Python projects
• APIs – for real-world data access
• Streamlit – build data apps without frontend knowledge
Double Tap ♥️ For More | 708 |
| 19 |  𝗞𝗶𝗰𝗸𝘀𝘁𝗮𝗿𝘁 𝗬𝗼𝘂𝗿 𝗔𝗜 𝗝𝗼𝘂𝗿𝗻𝗲𝘆 | 𝟱 𝗠𝘂𝘀𝘁-𝗪𝗮𝘁𝗰𝗵 𝗙𝗥𝗘𝗘 𝗩𝗶𝗱𝗲𝗼𝘀 🚀
The good news is — you don’t need expensive courses to understand the basics of AI, Machine Learning, Neural Networks, Prompting, and real-world AI tools.
This guide features 5 must-watch FREE AI videos that can help you build a strong foundation in AI concepts
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🚀 Start watching today. Learn AI step by step. Build future-ready skills for free. | 828 |
| 20 | 7. Layers in a Software Application
A well-designed application is divided into layers.
Presentation Layer
• User Interface
• Displays information
• Accepts user input
Business Logic Layer
• Processes data
• Applies business rules
• Validates requests
Data Layer
• Stores information
• Retrieves data
• Communicates with databases
Separating these layers makes applications easier to maintain.
8. Design Principles
Professional developers follow design principles to write maintainable software.
Some important principles include:
• Keep code simple
• Avoid repeating code DRY
• Separate responsibilities
• Write reusable components
• Prefer readability over complexity
These principles make projects easier to understand and extend.
9. System Design Basics
System Design focuses on building applications that can handle growth.
Questions to consider:
• How will the application handle thousands of users?
• How can performance be improved?
• How can downtime be minimized?
• How should data be stored?
Learning system design helps you think beyond writing code.
10. Scalability
Scalability means an application can handle increasing users without major performance issues.
Example:
100 Users ✅
10,000 Users ✅
1 Million Users ✅
A scalable architecture ensures the application continues to perform well as demand grows.
11. Security in Architecture
Security should be part of the architecture from the beginning.
Consider:
• Authentication
• Authorization
• Data Encryption
• Secure APIs
• Input Validation
Ignoring security can expose applications to serious risks.
Common Architecture Tools
Professional teams often use:
• Docker
• Kubernetes
• API Gateways
• Message Queues
• Load Balancers
These tools help build reliable and scalable systems.
Common Beginner Mistakes
• Building everything in one file
• Mixing frontend and backend logic
• Ignoring project structure
• Creating tightly coupled code
• Not separating responsibilities
Good architecture prevents these problems.
How to Learn Software Architecture
Follow this learning path:
Learn Monolithic Architecture → Understand REST APIs → Build Small Applications → Learn Layered Architecture → Explore Microservices → Study System Design
Take one step at a time.
Why This Step is Important
Understanding software architecture helps you:
• Build scalable applications
• Write maintainable code
• Work effectively in development teams
• Understand enterprise software
• Prepare for software engineering interviews
Final Advice
Great developers don't just write code.
They design software that is easy to maintain, secure, and scalable.
Good Architecture → Better Code → Better Software → Better User Experience
Double Tap ❤️ For More | 735 |
