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 52 032 suscriptores, ocupando la posición 2 552 en la categoría Tecnologías y Aplicaciones y el puesto 6 798 en la región India.
📊 Métricas de audiencia y dinámica
Desde su creación el невідомо, el proyecto ha mostrado un crecimiento acelerado, reuniendo a 52 032 suscriptores.
Según los últimos datos del 25 octubre, 2026, el canal mantiene una actividad estable. En los últimos 30 días la variación de miembros fue de -196, y en las últimas 24 horas de -8, conservando un alto alcance.
- Estado de verificación: No verificado
- Tasa de interacción (ER): El promedio de interacción de la audiencia es 2.15%. Durante las primeras 24 horas tras publicar, el contenido suele obtener 0.64% de reacciones respecto al total de suscriptores.
- Alcance de las publicaciones: Cada publicación recibe en promedio 1 121 visualizaciones. En el primer día suele acumular 332 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 26 octubre, 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.
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Publicaciones del Canal
🚀𝗠𝗔𝗦𝗧𝗘𝗥 𝗘𝗫𝗖𝗘𝗟 𝗙𝗢𝗥 𝗙𝗥𝗘𝗘 𝗜𝗡 𝟮𝟬𝟮𝟲! 📊
Discover 4 FREE Websites to learn Microsoft Excel from beginner to advanced level! 🎓
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🔗 𝗟𝗶𝗻𝗸👇:-
https://pdlink.in/4jDfcCP
⚡ One powerful skill can open doors to multiple career opportunities!
| 2 |  𝗗𝗮𝘁𝗮 𝗦𝗰𝗶𝗲𝗻𝗰𝗲 & 𝗠𝗮𝗰𝗵𝗶𝗻𝗲 𝗟𝗲𝗮𝗿𝗻𝗶𝗻𝗴 𝗙𝗥𝗘𝗘 𝗢𝗻𝗹𝗶𝗻𝗲 𝗠𝗮𝘀𝘁𝗲𝗿𝗰𝗹𝗮𝘀𝘀 📊
Build a strong foundation in Data Science .Explore Machine Learning and Deep Learning
Eligibility :- Students • Freshers • Working Professionals
📅 Date:- 23 October 2026
⏰ Time:- 7:00 PM–9:00 PM IST
💻 Mode:- Online
🔗 𝗥𝗲𝗴𝗶𝘀𝘁𝗲𝗿 𝗙𝗼𝗿 𝗙𝗥𝗘𝗘👇 :-
https://pdlink.in/4i8MKGn
📢 Share this opportunity with your friends and classmates. | 821 |
| 3 |  𝗠𝗜𝗖𝗥𝗢𝗦𝗢𝗙𝗧 𝗙𝗥𝗘𝗘 𝗗𝗔𝗧𝗔 𝗦𝗖𝗜𝗘𝗡𝗖𝗘 𝗥𝗘𝗦𝗢𝗨𝗥𝗖𝗘𝗦 𝟮𝟬𝟮𝟲! 🎓
Microsoft offers valuable FREE learning resources to help you develop in-demand technical skills! 💻
✅ 100% FREE Learning Resources
✅ Beginner-Friendly Tutorials
✅ Self-Paced Learning
✅ Practical Skills for Real-World Projects
✅ Useful for Data Analytics & Data Science Career Preparation
🔗 𝗔𝗰𝗰𝗲𝘀𝘀 𝗔𝗟𝗟 𝟰 𝗙𝗥𝗘𝗘 𝗥𝗲𝘀𝗼𝘂𝗿𝗰𝗲𝘀 👇:-
https://pdlink.in/4k6ylNq
⚡ Your Data Science journey can start today — completely FREE! | 676 |
| 4 | 🌐 Frontend Development Concepts You Should Know
Frontend development focuses on building the user interface (UI) of websites and web applications—the part users see and interact with in the browser. It combines design, structure, interactivity, and performance to create responsive and user-friendly web experiences.
1️⃣ Core Technologies of Frontend Development
Frontend development is built on three foundational technologies:
- HTML (HyperText Markup Language): provides the structure of a webpage
- CSS (Cascading Style Sheets): controls the visual appearance and layout
- JavaScript: adds interactivity and dynamic behavior to web pages
2️⃣ Important Frontend Concepts
- Responsive Design: ensures websites work properly across devices
- DOM (Document Object Model): represents the structure of a webpage as objects
- Event Handling: frontend applications respond to user actions
- Asynchronous Programming: fetch data without reloading pages
3️⃣ Frontend Frameworks & Libraries
- React: popular JavaScript library for building component-based UI
- Angular: full frontend framework for large-scale applications
- Vue.js: lightweight framework known for simplicity and flexibility
4️⃣ Styling Tools
- CSS Frameworks: Tailwind CSS, Bootstrap, Material UI
- CSS Preprocessors: Sass, Less
5️⃣ Frontend Development Tools
- VS Code: code editor
- Git: version control
- Webpack / Vite: module bundlers
- NPM / Yarn: package managers
- Chrome DevTools: debugging
6️⃣ Performance Optimization
- lazy loading
- code splitting
- image optimization
- caching strategies
- minimizing HTTP requests
7️⃣ Typical Frontend Development Workflow
1. UI/UX Design
2. HTML Structure
3. Styling with CSS
4. Add JavaScript Interactivity
5. Integrate APIs
6. Test and debug
7. Deploy application
8️⃣ Real-World Frontend Projects
- Responsive Portfolio Website
- Weather App
- To-Do List Application
- E-commerce Product Page
- Dashboard UI
Double Tap ♥️ For More | 835 |
| 5 |  𝗧𝗔𝗧𝗔 𝗙𝗥𝗘𝗘 𝗠𝗜𝗖𝗥𝗢-𝗜𝗡𝗧𝗘𝗥𝗡𝗦𝗛𝗜𝗣𝗦 𝟮𝟬𝟮𝟲! 🎓
✅ 100% FREE Learning Experience
✅ Short Programs — Approximately 4–6 Hours
✅ Practical, Real-World Tasks
✅ Self-Paced & Online
✅ Certificate Opportunities for Your Resume & LinkedIn
✅ No Traditional Interview Process
🔗 𝗘𝘅𝗽𝗹𝗼𝗿𝗲 𝗧𝗔𝗧𝗔 𝗙𝗥𝗘𝗘 𝗠𝗶𝗰𝗿𝗼-𝗜𝗻𝘁𝗲𝗿𝗻𝘀𝗵𝗶𝗽𝘀👇:-
https://pdlink.in/4yWgaPn
⚡ Don't wait for your first job to start gaining practical experience! | 719 |
| 6 |  𝟰 𝗙𝗥𝗘𝗘 𝗖𝗼𝘂𝗿𝘀𝗲𝘀 𝗧𝗼 𝗠𝗮𝘀𝘁𝗲𝗿 𝗖𝗼𝗱𝗶𝗻𝗴 𝗙𝗼𝗿 𝗙𝗥𝗘𝗘😍
✅ 100% FREE YouTube Learning
✅ Beginner-Friendly Programming Tutorials
✅ Learn Popular & In-Demand Tech Skills
✅ Study at Your Own Pace
✅ Build a Strong Foundation for Coding Interviews
🔗 𝗔𝗰𝗰𝗲𝘀𝘀 𝗔𝗟𝗟 𝟰 𝗙𝗥𝗘𝗘 𝗖𝗼𝘂𝗿𝘀𝗲𝘀 👇:-
https://pdlink.in/3WcuMvi
⚡ Your coding journey can start today—completely FREE! | 819 |
| 7 |  𝗜𝗕𝗠 𝗙𝗥𝗘𝗘 𝗧𝗘𝗖𝗛 𝗖𝗢𝗨𝗥𝗦𝗘𝗦 𝟮𝟬𝟮𝟲! 🎓
Explore IBM Cognitive Class and build in-demand tech skills without spending money on course fees!
📚 𝗧𝗼𝗽 𝗙𝗥𝗘𝗘 𝗖𝗼𝘂𝗿𝘀𝗲𝘀 𝘁𝗼 𝗘𝘅𝗽𝗹𝗼𝗿𝗲:-
💫 Artificial Intelligence & Machine Learning
🔥Python for Data Science
📊 Data Science Fundamentals
☁️ Cloud Computing & Big Data
🔗 𝗦𝘁𝗮𝗿𝘁 𝗟𝗲𝗮𝗿𝗻𝗶𝗻𝗴 𝗛𝗲𝗿𝗲 👇
https://pdlink.in/4zGswuX
📲 Save & Share with friends preparing for tech careers! 🔥 | 920 |
| 8 |  𝗗𝗮𝘁𝗮 𝘀𝗰𝗶𝗲𝗻𝗰𝗲 𝗖𝗲𝗿𝘁𝗶𝗳𝗶𝗰𝗮𝘁𝗶𝗼𝗻 𝗪𝗶𝘁𝗵 𝗔𝗜😍
Future Ready Data Science and AI Skills You Build
->Build Python, Machine Learning, and AI Skills
->Get Mentored by Industry Experts
->Practice with Mock Interviews
->Ace Your Placements & Land Dream Tech Job
🤝 500+ Partner Companies |🎓 2000+ Students Placed
🔗 𝗥𝗲𝗴𝗶𝘀𝘁𝗲𝗿 𝗡𝗼𝘄 👇 :-
https://pdlink.in/47pezFz
📲 Save & Share with Friends Preparing for Data Science & AI Jobs! | 993 |
| 9 | If you're working with data pipelines, these repositories are very useful: 🚀📊
ibis: A Python API that allows you to write queries once and run them on different data backends, such as DuckDB, BigQuery, and Snowflake. 🐍🔗
https://github.com/ibis-project/ibis
pygwalker: Instantly turns a DataFrame into an interactive UI for visual data exploration. 📈🖥️
https://github.com/Kanaries/pygwalker
katana: A fast and scalable web crawler, often used for security testing and large-scale data collection/search. 🕷️🔒
https://github.com/projectdiscovery/katana
Double Tap ❤️ For More Free Resources | 989 |
| 10 |  𝗧𝗢𝗣 𝗙𝗥𝗘𝗘 𝗖𝗢𝗨𝗥𝗦𝗘𝗦 𝗧𝗢 𝗕𝗢𝗢𝗦𝗧 𝗬𝗢𝗨𝗥 𝗦𝗞𝗜𝗟𝗟𝗦 𝗜𝗡 𝟮𝟬𝟮𝟲!
Explore FREE online learning resources to develop in-demand skills and improve your career opportunities!
🎓 Why Explore These Courses?
✅ Learn valuable professional skills
✅ Improve your resume
✅ Build practical knowledge
✅ Learn at your own pace
𝗘𝘅𝗽𝗹𝗼𝗿𝗲 𝗙𝗥𝗘𝗘 𝗖𝗼𝘂𝗿𝘀𝗲𝘀 𝗛𝗲𝗿𝗲👇
https://pdlink.in/3VBdt6V
💡 Learn New Skills → Build Confidence → Unlock Career Opportunities! | 1 306 |
| 11 |  🚀 𝗪𝗵𝗶𝗰𝗵 𝗧𝗲𝗰𝗵 𝗦𝗸𝗶𝗹𝗹 𝗪𝗶𝗹𝗹 𝗬𝗼𝘂 𝗠𝗮𝘀𝘁𝗲𝗿 𝗶𝗻 𝟮𝟬𝟮𝟲?
Want to build apps, uncover insights, or create AI solutions? Explore certification courses that match your career goals! 🎯
💻 𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁
👉 https://pdlink.in/3SuUeuD
📊 𝗗𝗮𝘁𝗮 𝗔𝗻𝗮𝗹𝘆𝘁𝗶𝗰𝘀
👉 https://pdlink.in/45vk5ph
💫𝗔𝗜 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴
👉 https://pdlink.in/4fWJVID
🔥 Choose your path, sharpen your skills, and take the next step towards your tech career!
📌 Save this post & share it with a friend planning to upskill. | 1 219 |
| 12 | 🔥 SQL Interview Case Studies (Advanced Business Scenarios) 💯
🧠 Case Study 1: Find Repeat Customers
📊 Orders Table
order_id customer_id
1 101
2 102
3 101
❓ Business Question
Find customers who placed more than 1 order.
✅ Solution
SELECT customer_id,
COUNT(*) AS total_orders
FROM orders
GROUP BY customer_id
HAVING COUNT(*) > 1;
🧠 Case Study 2: Highest Paid Employee Per Department
❓ Business Question
Find highest paid employee in every department.
✅ Solution
WITH RankedEmployees AS (
SELECT *,
ROW_NUMBER() OVER(
PARTITION BY department
ORDER BY salary DESC
) rn
FROM employees
)
SELECT *
FROM RankedEmployees
WHERE rn = 1;
🧠 Case Study 3: Find Inactive Customers
❓ Business Question
Customers who haven't ordered in the last 6 months.
✅ Solution
SELECT c.customer_id,
c.name
FROM customers c
LEFT JOIN orders o
ON c.customer_id = o.customer_id
GROUP BY c.customer_id, c.name
HAVING MAX(o.order_date) <
DATE_SUB(CURDATE(), INTERVAL 6 MONTH);
🧠 Case Study 4: Product Generating Highest Revenue
📊 Sales Table
product_id amount
✅ Solution
SELECT product_id,
SUM(amount) AS revenue
FROM sales
GROUP BY product_id
ORDER BY revenue DESC
LIMIT 1;
🧠 Case Study 5: Employee Salary Above Department Average
✅ Solution
WITH DeptAvg AS (
SELECT department,
AVG(salary) avg_salary
FROM employees
GROUP BY department
)
SELECT e.*
FROM employees e
JOIN DeptAvg d
ON e.department = d.department
WHERE e.salary > d.avg_salary;
🧠 Case Study 6: Running Total Sales
❓ Business Question
Calculate cumulative sales.
✅ Solution
SELECT order_date,
amount,
SUM(amount) OVER(
ORDER BY order_date
) AS running_total
FROM sales;
🧠 Case Study 7: Top 3 Products Per Category
✅ Solution
WITH RankedProducts AS (
SELECT *,
ROW_NUMBER() OVER(
PARTITION BY category
ORDER BY sales DESC
) rn
FROM products
)
SELECT *
FROM RankedProducts
WHERE rn <= 3;
🎯 Practice Tasks
1️⃣ Find customer with highest number of orders
2️⃣ Find lowest salary employee per department
3️⃣ Find products never sold
4️⃣ Find departments with average salary > company average
5️⃣ Find month with lowest sales
⚡ Mini Challenge 🔥
Banking Scenario
Tables:
Accounts
account_id customer_name
Transactions
transaction_id account_id amount transaction_date
Question
👉 Find the top 3 customers with highest total transaction amount in the last 1 year.
🔥 Interview Tip
When solving case studies:
1️⃣ Understand business question
2️⃣ Identify tables
3️⃣ Identify JOINs
4️⃣ Identify Aggregations
5️⃣ Decide whether Window Function is needed
Double Tap ❤️ For More | 1 355 |
| 13 |  🇮🇳 𝗚𝗢𝗩𝗘𝗥𝗡𝗠𝗘𝗡𝗧 𝗢𝗙 𝗜𝗡𝗗𝗜𝗔 — 𝗔𝗜𝗖𝗧𝗘 𝗜𝗡𝗧𝗘𝗥𝗡𝗦𝗛𝗜𝗣𝗦 𝟮𝟬𝟮𝟲 🚀
Students and freshers can explore internship opportunities through the AICTE Internship Portal across multiple domains:
💻 AI, Data Science & Web Development
📈 Digital Marketing & Business Development
💰 Finance & Accounting
✍️ Content Writing & Graphic Design
⚙️ Mechanical, Civil & Electrical Engineering
🔗 𝗖𝗵𝗲𝗰𝗸 𝗢𝗽𝗽𝗼𝗿𝘁𝘂𝗻𝗶𝘁𝗶𝗲𝘀 & 𝗔𝗽𝗽𝗹𝘆 👇
https://pdlink.in/4y3vcBl
📢 Share this opportunity with your friends and classmates! | 1 090 |
| 14 |  🎓 𝗠𝗶𝗰𝗿𝗼𝘀𝗼𝗳𝘁 𝗙𝗥𝗘𝗘 𝗖𝗼𝘂𝗿𝘀𝗲𝘀 𝘄𝗶𝘁𝗵 𝗖𝗲𝗿𝘁𝗶𝗳𝗶𝗰𝗮𝘁𝗲𝘀! 🚀🔥
Upgrade your resume with Microsoft learning opportunities. Explore courses covering some of today's most in-demand tech skills!
🎯 Perfect for Students • Freshers • Job Seekers • Working Professionals
✅ Learn at your own pace ✅ Build career-relevant skills ✅ Explore available certificates and credentials
🔗 𝗔𝗰𝗰𝗲𝘀𝘀 𝗠𝗶𝗰𝗿𝗼𝘀𝗼𝗳𝘁 𝗖𝗼𝘂𝗿𝘀𝗲𝘀 𝗛𝗲𝗿𝗲 👇
https://pdlink.in/3Uf5trR
🔥 Share with friends looking to upskill in 2026! | 1 192 |
| 15 | 🚀 DSA Topics Every Programmer Should Know 💻🔥
📦 1. Arrays
✔ Traversal
✔ Searching
✔ Sorting
✔ Prefix Sum
✔ Two Pointers
🔤 2. Strings
✔ Character Frequency
✔ Palindromes
✔ Anagrams
✔ String Manipulation
🔗 3. Linked Lists
✔ Singly Linked List
✔ Doubly Linked List
✔ Reverse a Linked List
✔ Fast & Slow Pointers
📚 4. Stacks & Queues
✔ Stack Operations
✔ Queue Operations
✔ Monotonic Stack
✔ Circular Queue
🔑 5. Hashing
✔ HashMap
✔ HashSet
✔ Frequency Counting
✔ Duplicate Detection
🌳 6. Trees
✔ Binary Trees
✔ BST
✔ Tree Traversals
✔ Height & Depth
✔ Lowest Common Ancestor
🌐 7. Graphs
✔ BFS
✔ DFS
✔ Shortest Path
✔ Connected Components
✔ Topological Sorting
🔎 8. Searching & Sorting
✔ Binary Search
✔ Merge Sort
✔ Quick Sort
✔ Heap Sort
🧩 9. Recursion & Backtracking
✔ Recursion Basics
✔ Subsets
✔ Permutations
✔ Combination Problems
✔ N-Queens
⚡ 10. Dynamic Programming
✔ Memoization
✔ Tabulation
✔ 1D & 2D DP
✔ Knapsack Problems
✔ Longest Common Subsequence
⏱️ BONUS: Complexity Analysis
✔ Big-O Notation
✔ Time Complexity
✔ Space Complexity
💬 Tap ❤️ if this helped you! | 1 099 |
| 16 | 🧩Now, Let's Understand Functions in Programming 👨💻🔥
After variables, operators, conditions, and loops, the next important concept is functions.
Functions help you organize code, avoid repetition, and make programs easier to understand and maintain.
🧠 1. What is a Function?
A function is a reusable block of code designed to perform a specific task.
Instead of writing the same code repeatedly, you can put it inside a function and call it whenever you need it.
For example:
def greet():
print("Hello!")
greet()
Output:
Hello!
🎯 2. Why Do We Use Functions?
Functions help with:
✔ Code reusability
✔ Better organization
✔ Easier debugging
✔ Readability
✔ Maintaining large programs
A good function usually focuses on one clear task.
📥 3. Function Parameters
Functions can accept information from the code that calls them.
def greet(name):
print("Hello", name)
greet("Alex")
Output:
Hello Alex
Here, "name" is a parameter.
"Alex" is the argument passed to the function.
📤 4. Returning a Value
A function can return a result instead of directly displaying it.
def add(a, b):
return a + b
result = add(10, 5)
print(result)
Output:
15
"return" sends the result back to the place where the function was called.
🔄 5. Parameters vs Arguments
These two terms are often confused.
In:
def add(a, b):
return a + b
"a" and "b" are parameters.
In:
add(10, 5)
"10" and "5" are arguments.
Parameter → Variable defined by the function
Argument → Actual value passed to the function
⚙️ 6. Default Parameters
A function can have a default value for a parameter.
def greet(name="Guest"):
print("Hello", name)
greet()
greet("Alex")
Output:
Hello Guest
Hello Alex
If no argument is provided, the default value is used.
🌍 7. Functions in Different Languages
The syntax changes between languages, but the concept remains similar.
Python
def add(a, b):
return a + b
JavaScript
function add(a, b) {
return a + b;
}
Java
static int add(int a, int b) {
return a + b;
}
C++
int add(int a, int b) {
return a + b;
}
The purpose is the same: define reusable logic that can be called when needed.
🧠 8. Local Variables
A variable created inside a function is generally local to that function.
def calculate():
result = 100
print(result)
calculate()
Here, "result" belongs to the function's local scope.
Understanding scope becomes especially important as programs become larger.
🔁 9. Functions Can Call Other Functions
One function can use another function.
def add(a, b):
return a + b
def show_result():
result = add(10, 20)
print(result)
show_result()
This allows larger programs to be broken into smaller, manageable pieces.
🧩 10. Functions and Loops
Functions and loops are often used together.
def print_numbers():
for i in range(1, 6):
print(i)
print_numbers()
The function organizes the task, while the loop handles repetition.
🔥 Double Tap ❤️ For More
-----
1.38 ₽ · /balance_help | 1 |
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| 19 | ✅ Daily Coding Habits That Make You a Better Developer 🧠💻✨
1️⃣ Code Every Day (Even 30 Mins)
Consistency builds muscle memory and long-term skills.
2️⃣ Read Other People’s Code
Explore GitHub repos or open-source projects to learn new patterns.
3️⃣ Write Clean, Readable Code
Use meaningful names, proper indentation, and comments.
4️⃣ Review and Refactor
Don’t just finish—improve. Refactor messy code for better logic and performance.
5️⃣ Practice DSA Regularly
Solve at least 1-2 problems a day on LeetCode or HackerRank.
6️⃣ Use Git from Day One
Commit often. It builds discipline and version control skills.
7️⃣ Learn One New Concept Weekly
Could be OOP, error handling, regex, or a new library.
8️⃣ Build Small Projects
Apply what you learn in mini real-world apps—no better way to reinforce skills.
9️⃣ Keep a Code Journal
Write what you learned daily. Great for review and portfolio building.
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