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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โญ• ACCENTURE Interview Experience โญ•

1) Introduce YourSelf Along With Projects, College Life, Family BackGround and your Passion Briefly?
2) Tell Me About Your Project?
3) Tools and Technologies Used in the Project?
4) Team Project or Individual Project?
5) About Contribution in Project?
6) Real-Time Applications of Project?
7) What is the Feedback of Your Project?
8) Tell Me About your Strengths?
9) About Career Gap if any?
10) What Are Technologies you are good at?
11) About hobbies?
12) Any questions?
โค4
๐——๐—ฎ๐˜๐—ฎ ๐—”๐—ป๐—ฎ๐—น๐˜†๐˜๐—ถ๐—ฐ๐˜€ ๐—ถ๐˜€ ๐—ผ๐—ป๐—ฒ ๐—ผ๐—ณ ๐˜๐—ต๐—ฒ ๐—บ๐—ผ๐˜€๐˜ ๐—ถ๐—ป-๐—ฑ๐—ฒ๐—บ๐—ฎ๐—ป๐—ฑ ๐˜€๐—ธ๐—ถ๐—น๐—น๐˜€ ๐˜๐—ผ๐—ฑ๐—ฎ๐˜†๐Ÿ˜

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Amazon Interview Process for Data Scientist position

๐Ÿ“Round 1- Phone Screen round
This was a preliminary round to check my capability, projects to coding, Stats, ML, etc.

After clearing this round the technical Interview rounds started. There were 5-6 rounds (Multiple rounds in one day).

๐Ÿ“ ๐—ฅ๐—ผ๐˜‚๐—ป๐—ฑ ๐Ÿฎ- ๐——๐—ฎ๐˜๐—ฎ ๐—ฆ๐—ฐ๐—ถ๐—ฒ๐—ป๐—ฐ๐—ฒ ๐—•๐—ฟ๐—ฒ๐—ฎ๐—ฑ๐˜๐—ต:
In this round the interviewer tested my knowledge on different kinds of topics.

๐Ÿ“๐—ฅ๐—ผ๐˜‚๐—ป๐—ฑ ๐Ÿฏ- ๐——๐—ฒ๐—ฝ๐˜๐—ต ๐—ฅ๐—ผ๐˜‚๐—ป๐—ฑ:
In this round the interviewers grilled deeper into 1-2 topics. I was asked questions around:
Standard ML tech, Linear Equation, Techniques, etc.

๐Ÿ“๐—ฅ๐—ผ๐˜‚๐—ป๐—ฑ ๐Ÿฐ- ๐—–๐—ผ๐—ฑ๐—ถ๐—ป๐—ด ๐—ฅ๐—ผ๐˜‚๐—ป๐—ฑ-
This was a Python coding round, which I cleared successfully.

๐Ÿ“๐—ฅ๐—ผ๐˜‚๐—ป๐—ฑ ๐Ÿฑ- This was ๐—›๐—ถ๐—ฟ๐—ถ๐—ป๐—ด ๐— ๐—ฎ๐—ป๐—ฎ๐—ด๐—ฒ๐—ฟ where my fitment for the team got assessed.

๐Ÿ“๐—Ÿ๐—ฎ๐˜€๐˜ ๐—ฅ๐—ผ๐˜‚๐—ป๐—ฑ- ๐—•๐—ฎ๐—ฟ ๐—ฅ๐—ฎ๐—ถ๐˜€๐—ฒ๐—ฟ- Very important round, I was asked heavily around Leadership principles & Employee dignity questions.

So, here are my Tips if youโ€™re targeting any Data Science role:
-> Never make up stuff & donโ€™t lie in your Resume.
-> Projects thoroughly study.
-> Practice SQL, DSA, Coding problem on Leetcode/Hackerank.
-> Download data from Kaggle & build EDA (Data manipulation questions are asked)

Best Data Science & Machine Learning Resources: https://topmate.io/coding/914624

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๐Ÿ‘‰ Introduction to Prog & CS:
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๐Ÿ‘‰ OS:
https://youtu.be/3obEP8eLsCw?si=SSTwuiMWSc4KtGhy

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๐Ÿ‘‰SQL
https://youtu.be/VCZxODefTIs?si=U0rn-L8CUB6_WfVk

https://whatsapp.com/channel/0029VanC5rODzgT6TiTGoa1v

๐Ÿ‘‰ Data Analytics:
https://youtu.be/PSNXoAs2FtQ?si=yTzjpW2lP3qbVy22

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๐Ÿ‘‰ Python:
https://youtu.be/LHBE6Q9XlzI?si=9R_HmHaD7uGFWOvk
https://whatsapp.com/channel/0029VaiM08SDuMRaGKd9Wv0L

๐Ÿ‘‰ Web Development:
https://youtube.com/playlist?list=PLu0W_9lII9agq5TrH9XLIKQvv0iaF2X3w&si=sbUzknTFsSo2RHh4

https://whatsapp.com/channel/0029VaiSdWu4NVis9yNEE72z

๐Ÿ‘‰ Java:
https://youtube.com/playlist?list=PLsyeobzWxl7pe_IiTfNyr55kwJPWbgxB5&si=TUQALbuysZfeLknX

https://whatsapp.com/channel/0029VamdH5mHAdNMHMSBwg1s

๐Ÿ‘‰ DBMS:
https://youtu.be/dl00fOOYLOM?si=w7THW7f8qdmztsd6

๐Ÿ‘‰ DSA:
https://youtube.com/playlist?list=PLgUwDviBIf0oF6QL8m22w1hIDC1vJ_BHz&si=2zY8MHinpZN6S-Ox

https://whatsapp.com/channel/0029VammZijATRSlLxywEC3X

๐Ÿ‘‰ C++:
https://youtu.be/8jLOx1hD3_o?si=kD5OHquB7uN7J2eG

๐Ÿ‘‰ Ethical Hacking:
https://youtu.be/cKEf8H9cQGM?si=xzL7ogRnnJCyhZlc

https://whatsapp.com/channel/0029VancSnGG8l5KQYOOyL1T

๐Ÿ‘‰ Data Science:
https://youtu.be/gDZ6czwuQ18?si=Nmj950IQBRHPVocQ

https://whatsapp.com/channel/0029Va4QUHa6rsQjhITHK82y

๐Ÿ‘‰ Machine Learning:
https://youtu.be/LvC68w9JS4Y?si=rXnXfmZVg0a7Ijpz

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ENJOY LEARNING ๐Ÿ‘ ๐Ÿ‘
โค6๐Ÿ†1
๐Ÿ”ฐ Python string methods
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Top 5 Mistakes to Avoid When Learning Programming โŒ๐Ÿ’ป

1๏ธโƒฃ Skipping the Basics
Jumping into advanced topics without learning fundamentals like variables, loops, and functions slows real progress. Start simple.

2๏ธโƒฃ Only Watching Tutorials
Watching is passive. Code along and build your own projects. Learning comes from doing.

3๏ธโƒฃ Copy-Pasting Without Understanding
Donโ€™t just copy code from the internet. Break it down and learn what each part does.

4๏ธโƒฃ Avoiding Debugging
Debugging teaches problem-solving. Donโ€™t fear errorsโ€”read them, fix them, learn from them.

5๏ธโƒฃ Trying to Learn Too Many Languages
Stick to one language (like Python or JavaScript) until you're confident. Depth matters more than variety.

๐Ÿ’ฌ Tap โค๏ธ for more!
โค7
๐——๐—ฎ๐˜๐—ฎ ๐—ฆ๐—ฐ๐—ถ๐—ฒ๐—ป๐—ฐ๐—ฒ & ๐—™๐˜‚๐—น๐—น๐˜€๐˜๐—ฎ๐—ฐ๐—ธ ๐——๐—ฒ๐˜ƒ๐—ฒ๐—น๐—ผ๐—ฝ๐—บ๐—ฒ๐—ป๐˜ ๐—”๐—ฟ๐—ฒ ๐—›๐—ถ๐—ด๐—ต๐—น๐˜† ๐——๐—ฒ๐—บ๐—ฎ๐—ป๐—ฑ๐—ถ๐—ป๐—ด ๐—œ๐—ป ๐Ÿฎ๐Ÿฌ๐Ÿฎ๐Ÿฒ๐Ÿ˜

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PROJECT IDEAS โœจ

๐ŸŸข Beginner Level (Python Foundations)

๐Ÿ‘‰| Number Guessing Game (CLI + GUI)
๐Ÿ‘‰| To-Do List App (File-based / Tkinter)
๐Ÿ‘‰| Weather App using API
๐Ÿ‘‰| Password Generator & Strength Checker
๐Ÿ‘‰| URL Shortener
๐Ÿ‘‰| Calculator with Voice Input
๐Ÿ‘‰| Quiz App with Score Tracking
๐Ÿ‘‰| Basic Web Scraper (News / Jobs)
๐Ÿ‘‰| Expense Tracker
๐Ÿ‘‰| Chatbot using Rule-Based Logic

๐ŸŸก Intermediate Level (Data + ML Basics)

๐Ÿ‘‰| Movie Recommendation System
๐Ÿ‘‰| Stock Price Visualization Dashboard
๐Ÿ‘‰| Email Spam Classifier
๐Ÿ‘‰| Resume Parser using NLP
๐Ÿ‘‰| Face Detection App (OpenCV)
๐Ÿ‘‰| Fake News Detection
๐Ÿ‘‰| Handwritten Digit Recognition
๐Ÿ‘‰| Twitter / Reddit Sentiment Analyzer
๐Ÿ‘‰| House Price Prediction
๐Ÿ‘‰| OCR System (Image โ†’ Text)

๐Ÿ”ต Advanced Level (AI Systems & Real-World Products)

๐Ÿ‘‰| Voice Assistant (Jarvis-like)
๐Ÿ‘‰| Real-Time Face Recognition System
๐Ÿ‘‰| AI Interview Bot
๐Ÿ‘‰| Autonomous Web Scraping Agent
๐Ÿ‘‰| YouTube Video Summarizer (NLP + LLMs)
๐Ÿ‘‰| AI Study Planner
๐Ÿ‘‰| ChatGPT-powered Customer Support Bot
๐Ÿ‘‰| Recommendation Engine with Deep Learning
๐Ÿ‘‰| Fraud Detection System
๐Ÿ‘‰| Document Question Answering System

๐Ÿ”ด Expert / Startup-Level (AI Agents & Full Products)

๐Ÿ‘‰| Multi-Agent Task Automation System
๐Ÿ‘‰| AI Coding Assistant (like Copilot mini)
๐Ÿ‘‰| Personalized Learning AI Coach
๐Ÿ‘‰| Autonomous Trading Bot
๐Ÿ‘‰| AI Content Creation Pipeline (Reels, Blogs, Shorts)
๐Ÿ‘‰| AI Research Assistant
๐Ÿ‘‰| Smart Resume Matching System
๐Ÿ‘‰| AI SaaS for Social Media Automation
๐Ÿ‘‰| Real-Time Speech Translation System
๐Ÿ‘‰| End-to-End AI Search Engine
โค1
๐ŸŽ“ ๐—–๐—ถ๐˜€๐—ฐ๐—ผ ๐—™๐—ฅ๐—˜๐—˜ ๐—–๐—ฒ๐—ฟ๐˜๐—ถ๐—ณ๐—ถ๐—ฐ๐—ฎ๐˜๐—ถ๐—ผ๐—ป ๐—–๐—ผ๐˜‚๐—ฟ๐˜€๐—ฒ๐˜€ โ€“ ๐—Ÿ๐—ถ๐—บ๐—ถ๐˜๐—ฒ๐—ฑ ๐—ง๐—ถ๐—บ๐—ฒ! ๐Ÿ˜

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โœ… Backend Basics Interview Questions โ€“ Part 1 (Node.js) ๐Ÿง ๐Ÿ’ป

๐Ÿ“ 1. What is Node.js?
A: Node.js is a runtime environment that lets you run JavaScript on the server side. It uses Googleโ€™s V8 engine and is designed for building scalable network applications.

๐Ÿ“ 2. How is Node.js different from traditional server-side platforms?
A: Unlike PHP or Java, Node.js is event-driven and non-blocking. This makes it lightweight and efficient for I/O-heavy operations like APIs and real-time apps.

๐Ÿ“ 3. What is the role of the package.json file?
A: It stores metadata about your project (name, version, scripts) and dependencies. Itโ€™s essential for managing and sharing Node.js projects.

๐Ÿ“ 4. What are CommonJS modules in Node.js?
A: Node uses CommonJS to handle modules. You use require() to import and module.exports to export code between files.

๐Ÿ“ 5. What is the Event Loop in Node.js?
A: It allows Node.js to handle many connections asynchronously without blocking. Itโ€™s the heart of Nodeโ€™s non-blocking architecture.

๐Ÿ“ 6. What is middleware in Node.js (Express)?
A: Middleware functions process requests before sending a response. They can be used for logging, auth, validation, etc.

๐Ÿ“ 7. What is the difference between process.nextTick(), setTimeout(), and setImmediate()?
A:
โฆ process.nextTick() runs after the current operation, before the next event loop.
โฆ setTimeout() runs after a minimum delay.
โฆ setImmediate() runs on the next cycle of the event loop.

๐Ÿ“ 8. What is a callback function in Node.js?
A: A function passed as an argument to another function, executed after an async task finishes. Itโ€™s the core of async programming in Node.

๐Ÿ“ 9. What are Streams in Node.js?
A: Streams let you read/write data piece-by-piece (chunks), great for handling large files. Types: Readable, Writable, Duplex, Transform.

๐Ÿ“ 10. What is the difference between require and import?
A:
โฆ require is CommonJS (used in Node.js by default).
โฆ import is ES6 module syntax (used with "type": "module" in package.json).

๐Ÿ’ฌ Tap โค๏ธ for more!
โค7
๐—”๐—œ & ๐— ๐—Ÿ ๐—–๐—ฒ๐—ฟ๐˜๐—ถ๐—ณ๐—ถ๐—ฐ๐—ฎ๐˜๐—ถ๐—ผ๐—ป ๐—•๐˜† ๐—œ๐—œ๐—ง ๐—ฃ๐—ฎ๐˜๐—ป๐—ฎ ๐Ÿ˜

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โค1
โœ… ๐Ÿ”ค Aโ€“Z of Full Stack Development

A โ€“ Authentication
Verifying user identity using methods like login, tokens, or biometrics.

B โ€“ Build Tools
Automate tasks like bundling, transpiling, and optimizing code (e.g., Webpack, Vite).

C โ€“ CRUD
Create, Read, Update, Delete โ€“ the core operations of most web apps.

D โ€“ Deployment
Publishing your app to a live server or cloud platform.

E โ€“ Environment Variables
Store sensitive data like API keys securely outside your codebase.

F โ€“ Frameworks
Tools that simplify development (e.g., React, Express, Django).

G โ€“ GraphQL
A query language for APIs that gives clients exactly the data they need.

H โ€“ HTTP (HyperText Transfer Protocol)
Foundation of data communication on the web.

I โ€“ Integration
Connecting different systems or services (e.g., payment gateways, APIs).

J โ€“ JWT (JSON Web Token)
Compact way to securely transmit information between parties for authentication.

K โ€“ Kubernetes
Tool for automating deployment and scaling of containerized applications.

L โ€“ Load Balancer
Distributes incoming traffic across multiple servers for better performance.

M โ€“ Middleware
Functions that run during request/response cycles in backend frameworks.

N โ€“ NPM (Node Package Manager)
Tool to manage JavaScript packages and dependencies.

O โ€“ ORM (Object-Relational Mapping)
Maps database tables to objects in code (e.g., Sequelize, Prisma).

P โ€“ PostgreSQL
Powerful open-source relational database system.

Q โ€“ Queue
Used for handling background tasks (e.g., RabbitMQ, Redis queues).

R โ€“ REST API
Architectural style for designing networked applications using HTTP.

S โ€“ Sessions
Store user data across multiple requests (e.g., login sessions).

T โ€“ Testing
Ensures your code works as expected (e.g., Jest, Mocha, Cypress).

U โ€“ UX (User Experience)
Designing intuitive and enjoyable user interactions.

V โ€“ Version Control
Track and manage code changes (e.g., Git, GitHub).

W โ€“ WebSockets
Enable real-time communication between client and server.

X โ€“ XSS (Cross-Site Scripting)
Security vulnerability where attackers inject malicious scripts into web pages.

Y โ€“ YAML
Human-readable data format often used for configuration files.

Z โ€“ Zero Downtime Deployment
Deploy updates without interrupting the running application.

๐Ÿ’ฌ Double Tap โค๏ธ for more!
โค3
๐—ฃ๐—ฎ๐˜† ๐—”๐—ณ๐˜๐—ฒ๐—ฟ ๐—ฃ๐—น๐—ฎ๐—ฐ๐—ฒ๐—บ๐—ฒ๐—ป๐˜ ๐—ง๐—ฟ๐—ฎ๐—ถ๐—ป๐—ถ๐—ป๐—ด ๐Ÿ˜

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๐Ÿ’ป Donโ€™t Overwhelm to Prepare for Coding Interviews โ€” Itโ€™s Only This Much ๐Ÿš€

๐Ÿ”น FOUNDATIONS (Must First)
1๏ธโƒฃ Programming Language Mastery
- Choose one: Python โญ (most popular) Java C++ JavaScript
- Focus on: Syntax Loops & conditions Functions Built-in libraries Writing clean code

2๏ธโƒฃ Time & Space Complexity
- Big-O notation
- Time vs space tradeoff
- Best / average / worst case
- Complexity analysis
๐Ÿ”ฅ Very important for interviews

3๏ธโƒฃ Problem Solving Basics
- Pattern recognition
- Breaking problems into steps
- Writing pseudocode
- Edge case handling

๐Ÿ”ฅ CORE DATA STRUCTURES (HIGH PRIORITY)
4๏ธโƒฃ Arrays
- Traversal
- Two pointer technique
- Sliding window
- Prefix sum (๐Ÿ”ฅ Most asked topic)

5๏ธโƒฃ Strings
- Manipulation
- Palindrome problems
- Pattern matching

6๏ธโƒฃ Hashing
- HashMap / Dictionary
- Frequency counting
- Fast lookup problems

7๏ธโƒฃ Linked List
- Insert/delete operations
- Reverse list
- Fast & slow pointer

8๏ธโƒฃ Stack & Queue
- LIFO / FIFO
- Valid parentheses
- Monotonic stack

9๏ธโƒฃ Trees
- Binary tree traversal
- Binary Search Tree
- Recursion
- Tree depth / height (๐Ÿ”ฅ Very important)

๐Ÿ”Ÿ Heap / Priority Queue
- Min / max heap
- Top K problems

1๏ธโƒฃ1๏ธโƒฃ Graphs
- BFS / DFS
- Shortest path
- Cycle detection

๐Ÿš€ ALGORITHMS (CORE INTERVIEW TOPICS)
1๏ธโƒฃ2๏ธโƒฃ Searching Algorithms
- Linear search
- Binary search

1๏ธโƒฃ3๏ธโƒฃ Sorting Algorithms
- Quick sort
- Merge sort
- Heap sort

1๏ธโƒฃ4๏ธโƒฃ Recursion & Backtracking
- Subsets
- Permutations
- N-Queens

1๏ธโƒฃ5๏ธโƒฃ Greedy Algorithms
- Activity selection
- Interval problems

1๏ธโƒฃ6๏ธโƒฃ Dynamic Programming (DP)
- Memoization
- Tabulation
- Knapsack problems (๐Ÿ”ฅ Hard but high-value topic)

โš™๏ธ INTERVIEW SKILLS
1๏ธโƒฃ7๏ธโƒฃ Coding Patterns (Must Know โญ)
- Two pointers
- Sliding window
- Fast & slow pointers
- Divide & conquer
- Backtracking
- BFS / DFS patterns

1๏ธโƒฃ8๏ธโƒฃ Writing Clean Code
- Readable variable names
- Modular functions
- Handling edge cases

1๏ธโƒฃ9๏ธโƒฃ Debugging Skills
- Test cases
- Dry run
- Error fixing

2๏ธโƒฃ0๏ธโƒฃ Communication During Interview
- Explain approach first
- Think aloud
- Discuss complexity (๐Ÿ”ฅ Often ignored but important)

๐ŸŒŸ ADVANCED / TOP COMPANY PREP
2๏ธโƒฃ1๏ธโƒฃ System Design Basics
- Scalability
- Load balancing
- Architecture concepts

2๏ธโƒฃ2๏ธโƒฃ Object-Oriented Design
- Classes & objects
- Design principles
- Low-level design

2๏ธโƒฃ3๏ธโƒฃ Competitive Programming (Optional)
- Codeforces
- LeetCode contests

โญ Best Practice Platforms
- LeetCode โญ
- HackerRank
- Codeforces
- GeeksforGeeks

โญ Double Tap โ™ฅ๏ธ For More
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โœ… Hurry Up...Limited seats only
๐Ÿ’ป Coding Interview Foundations โ€” Part 1: Programming Language ๐Ÿš€

Before jumping into Data Structures & Algorithms, master one programming language deeply. (Recommended: Python โ€” simple, powerful, interview-friendly โญ)

๐Ÿ”น What You Must Master
โœ… 1. Syntax & Basics
- Variables
- Data types โ†’ int, float, str, bool
- Lists, Tuples, Sets, Dictionaries
- Input / Output
- Type casting
๐Ÿ‘‰ If syntax is weak โ†’ logic wonโ€™t help in interviews.

โœ… 2. Loops & Conditions
- if-else statements
- for loop
- while loop
- break, continue
- Nested loops
๐Ÿ”ฅ Used in almost every coding problem.

โœ… 3. Functions
- Function definition
- Parameters & return values
- Default arguments
- Recursion basics
โœ” Helps write modular and structured code.

โœ… 4. Important Built-in Libraries (Python Users โญ)
- collections โ†’ Counter, defaultdict
- heapq โ†’ Priority Queue
- math
- itertools
Using built-ins efficiently = strong problem solving.

โœ… 5. Writing Clean Code
- Meaningful variable names
- Small reusable functions
- Handle edge cases
- Clear logic structure
Interviewers evaluate thinking + code quality.

โฑ๏ธ Recommended Time
Beginner โ†’ 2 weeks
Intermediate โ†’ 4โ€“5 days revision
Daily: 30 min concept revision
1โ€“2 practice problems

โŒ Avoid These Mistakes
- Learning multiple languages at once
- Jumping to advanced topics too early
- Memorizing solutions without understanding

Python Resources: https://whatsapp.com/channel/0029VbBDoisBvvscrno41d1l

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