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Everything about programming for beginners
* Python programming
* Java programming
* App development
* Machine Learning
* Data Science

Managed by: @love_data
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Sample email template to reach out to HR’s as fresher

Hi Jasneet,

I recently came across your LinkedIn post seeking a React.js developer intern, and I am writing to express my interest in the position at Airtel. As a recent graduate, I am eager to begin my career and am excited about the opportunity.

I am a quick learner and have developed a strong set of dynamic and user-friendly web applications using various technologies, including HTML, CSS, JavaScript, Bootstrap, React.js, Vue.js, PHP, and MySQL. I am also well-versed in creating reusable components, implementing responsive designs, and ensuring cross-browser compatibility.

I am confident that my eagerness to learn and strong work ethic will make me an asset to your team.

I have attached my resume for your review. Thank you for considering my application. I look forward to hearing from you soon.

Thanks!


I hope you will found this helpful πŸ™‚
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If I Were to Start My Data Science Career from Scratch, Here's What I Would Do πŸ‘‡

1️⃣ Master Advanced SQL

Foundations: Learn database structures, tables, and relationships.

Basic SQL Commands: SELECT, FROM, WHERE, ORDER BY.

Aggregations: Get hands-on with SUM, COUNT, AVG, MIN, MAX, GROUP BY, and HAVING.

JOINs: Understand LEFT, RIGHT, INNER, OUTER, and CARTESIAN joins.

Advanced Concepts: CTEs, window functions, and query optimization.

Metric Development: Build and report metrics effectively.


2️⃣ Study Statistics & A/B Testing

Descriptive Statistics: Know your mean, median, mode, and standard deviation.

Distributions: Familiarize yourself with normal, Bernoulli, binomial, exponential, and uniform distributions.

Probability: Understand basic probability and Bayes' theorem.

Intro to ML: Start with linear regression, decision trees, and K-means clustering.

Experimentation Basics: T-tests, Z-tests, Type 1 & Type 2 errors.

A/B Testing: Design experimentsβ€”hypothesis formation, sample size calculation, and sample biases.


3️⃣ Learn Python for Data

Data Manipulation: Use pandas for data cleaning and manipulation.

Data Visualization: Explore matplotlib and seaborn for creating visualizations.

Hypothesis Testing: Dive into scipy for statistical testing.

Basic Modeling: Practice building models with scikit-learn.


4️⃣ Develop Product Sense

Product Management Basics: Manage projects and understand the product life cycle.

Data-Driven Strategy: Leverage data to inform decisions and measure success.

Metrics in Business: Define and evaluate metrics that matter to the business.


5️⃣ Hone Soft Skills

Communication: Clearly explain data findings to technical and non-technical audiences.

Collaboration: Work effectively in teams.

Time Management: Prioritize and manage projects efficiently.

Self-Reflection: Regularly assess and improve your skills.


6️⃣ Bonus: Basic Data Engineering

Data Modeling: Understand dimensional modeling and trade-offs in normalization vs. denormalization.

ETL: Set up extraction jobs, manage dependencies, clean and validate data.

Pipeline Testing: Conduct unit testing and ensure data quality throughout the pipeline.

I have curated the best interview resources to crack Data Science Interviews
πŸ‘‡πŸ‘‡
https://whatsapp.com/channel/0029Va8v3eo1NCrQfGMseL2D

Like if you need similar content πŸ˜„πŸ‘
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Important skills every self-taught developer should master:

πŸ’» HTML, CSS & JavaScript β€” the foundation of web development

βš™οΈ Git & GitHub β€” track changes and collaborate effectively

🧠 Problem-solving β€” break down and debug complex issues

πŸ—„οΈ Basic SQL β€” manage and query data efficiently

🧩 APIs β€” fetch and use data from external sources

🧱 Frameworks β€” like React, Flask, or Django to build faster

🧼 Clean Code β€” write readable, maintainable code

πŸ“¦ Package Managers β€” like npm or pip for managing libraries

πŸš€ Deployment β€” host your projects for the world to see

Web Development Resources: https://whatsapp.com/channel/0029VaiSdWu4NVis9yNEE72z
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Don't overwhelm to learn JavaScript, JavaScript is only this much

1.Variables
β€’ var
β€’ let
β€’ const

2. Data Types
β€’ number
β€’ string
β€’ boolean
β€’ null
β€’ undefined
β€’ symbol

3.Declaring variables
β€’ var
β€’ let
β€’ const

4.Expressions
Primary expressions
β€’ this
β€’ Literals
β€’ []
β€’ {}
β€’ function
β€’ class
β€’ function*
β€’ async function
β€’ async function*
β€’ /ab+c/i
β€’ string
β€’ ( )

Left-hand-side expressions
β€’ Property accessors
β€’ ?.
β€’ new
β€’ new .target
β€’ import.iss.oneta
β€’ super
β€’ import()

5.operators
β€’ Arithmetic Operators: +, -, *, /, %
β€’ Comparison Operators: ==, ===, !=, !==, <, >, <=, >=
β€’ Logical Operators: &&, ||, !

6.Control Structures
β€’ if
β€’ else if
β€’ else
β€’ switch
β€’ case
β€’ default

7.Iterations/Loop
β€’ do...while
β€’ for
β€’ for...in
β€’ for...of
β€’ for await...of
β€’ while

8.Functions
β€’ Arrow Functions
β€’ Default parameters
β€’ Rest parameters
β€’ arguments
β€’ Method definitions
β€’ getter
β€’ setter

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

10.Classes and Prototypes
β€’ Class Declaration
β€’ Constructor Functions
β€’ Prototypal Inheritance
β€’ extends keyword
β€’ super keyword
β€’ Private class features
β€’ Public class fields
β€’ static
β€’ Static initialization blocks

11.Error Handling
β€’ try,
β€’ catch,
β€’ finally (exception handling)

ADVANCED CONCEPTS

12.Closures
β€’ Lexical Scope
β€’ Function Scope
β€’ Closure Use Cases

13.Asynchronous JavaScript
β€’ Callback Functions
β€’ Promises
β€’ async/await Syntax
β€’ Fetch API
β€’ XMLHttpRequest

14.Modules
β€’ import and export Statements (ES6 Modules)
β€’ CommonJS Modules (require, module.exports)

15.Event Handling
β€’ Event Listeners
β€’ Event Object
β€’ Bubbling and Capturing

16.DOM Manipulation
β€’ Selecting DOM Elements
β€’ Modifying Element Properties
β€’ Creating and Appending Elements

17.Regular Expressions
β€’ Pattern Matching
β€’ RegExp Methods: test(), exec(), match(), replace()

18.Browser APIs
β€’ localStorage and sessionStorage
β€’ navigator Object
β€’ Geolocation API
β€’ Canvas API

19.Web APIs
β€’ setTimeout(), setInterval()
β€’ XMLHttpRequest
β€’ Fetch API
β€’ WebSockets

20.Functional Programming
β€’ Higher-Order Functions
β€’ map(), reduce(), filter()
β€’ Pure Functions and Immutability

21.Promises and Asynchronous Patterns
β€’ Promise Chaining
β€’ Error Handling with Promises
β€’ Async/Await

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

23.Browser Object Model (BOM)
β€’ window Object
β€’ history Object
β€’ location Object
β€’ navigator Object

24.Node.js Specific Concepts
β€’ require()
β€’ Node.js Modules (module.exports)
β€’ File System Module (fs)
β€’ npm (Node Package Manager)

25.Testing Frameworks
β€’ Jasmine
β€’ Mocha
β€’ Jest
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Master Javascript :

The JavaScript Tree πŸ‘‡
|
|── Variables
| β”œβ”€β”€ var
| β”œβ”€β”€ let
| └── const
|
|── Data Types
| β”œβ”€β”€ String
| β”œβ”€β”€ Number
| β”œβ”€β”€ Boolean
| β”œβ”€β”€ Object
| β”œβ”€β”€ Array
| β”œβ”€β”€ Null
| └── Undefined
|
|── Operators
| β”œβ”€β”€ Arithmetic
| β”œβ”€β”€ Assignment
| β”œβ”€β”€ Comparison
| β”œβ”€β”€ Logical
| β”œβ”€β”€ Unary
| └── Ternary (Conditional)
||── Control Flow
| β”œβ”€β”€ if statement
| β”œβ”€β”€ else statement
| β”œβ”€β”€ else if statement
| β”œβ”€β”€ switch statement
| β”œβ”€β”€ for loop
| β”œβ”€β”€ while loop
| └── do-while loop
|
|── Functions
| β”œβ”€β”€ Function declaration
| β”œβ”€β”€ Function expression
| β”œβ”€β”€ Arrow function
| └── IIFE (Immediately Invoked Function Expression)
|
|── Scope
| β”œβ”€β”€ Global scope
| β”œβ”€β”€ Local scope
| β”œβ”€β”€ Block scope
| └── Lexical scope
||── Arrays
| β”œβ”€β”€ Array methods
| | β”œβ”€β”€ push()
| | β”œβ”€β”€ pop()
| | β”œβ”€β”€ shift()
| | β”œβ”€β”€ unshift()
| | β”œβ”€β”€ splice()
| | β”œβ”€β”€ slice()
| | └── concat()
| └── Array iteration
| β”œβ”€β”€ forEach()
| β”œβ”€β”€ map()
| β”œβ”€β”€ filter()
| └── reduce()|
|── Objects
| β”œβ”€β”€ Object properties
| | β”œβ”€β”€ Dot notation
| | └── Bracket notation
| β”œβ”€β”€ Object methods
| | β”œβ”€β”€ Object.keys()
| | β”œβ”€β”€ Object.values()
| | └── Object.entries()
| └── Object destructuring
||── Promises
| β”œβ”€β”€ Promise states
| | β”œβ”€β”€ Pending
| | β”œβ”€β”€ Fulfilled
| | └── Rejected
| β”œβ”€β”€ Promise methods
| | β”œβ”€β”€ then()
| | β”œβ”€β”€ catch()
| | └── finally()
| └── Promise.all()
|
|── Asynchronous JavaScript
| β”œβ”€β”€ Callbacks
| β”œβ”€β”€ Promises
| └── Async/Await
|
|── Error Handling
| β”œβ”€β”€ try...catch statement
| └── throw statement
|
|── JSON (JavaScript Object Notation)
||── Modules
| β”œβ”€β”€ import
| └── export
|
|── DOM Manipulation
| β”œβ”€β”€ Selecting elements
| β”œβ”€β”€ Modifying elements
| └── Creating elements
|
|── Events
| β”œβ”€β”€ Event listeners
| β”œβ”€β”€ Event propagation
| └── Event delegation
|
|── AJAX (Asynchronous JavaScript and XML)
|
|── Fetch API
||── ES6+ Features
| β”œβ”€β”€ Template literals
| β”œβ”€β”€ Destructuring assignment
| β”œβ”€β”€ Spread/rest operator
| β”œβ”€β”€ Arrow functions
| β”œβ”€β”€ Classes
| β”œβ”€β”€ let and const
| β”œβ”€β”€ Default parameters
| β”œβ”€β”€ Modules
| └── Promises
|
|── Web APIs
| β”œβ”€β”€ Local Storage
| β”œβ”€β”€ Session Storage
| └── Web Storage API
|
|── Libraries and Frameworks
| β”œβ”€β”€ React
| β”œβ”€β”€ Angular
| └── Vue.js
||── Debugging
| β”œβ”€β”€ Console.log()
| β”œβ”€β”€ Breakpoints
| └── DevTools
|
|── Others
| β”œβ”€β”€ Closures
| β”œβ”€β”€ Callbacks
| β”œβ”€β”€ Prototypes
| β”œβ”€β”€ this keyword
| β”œβ”€β”€ Hoisting
| └── Strict mode
|
| END __
πŸ‘4❀1
πŸ“Œ Python Cheatsheet: Master the Foundations & Beyond
Start learning Python β†’

⬇️ Core Python Building Blocks

Basic Commands
β†’ print() – Display output
β†’ input() – Get user input
β†’ len() – Get length of a data structure
β†’ type() – Get variable type
β†’ range() – Generate a sequence
β†’ help() – Get documentation

Data Types
β†’ int, float, bool, str – Numbers & text
β†’ list, tuple, dict, set – Data collections

Control Structures
β†’ if / elif / else – Conditional logic
β†’ for, while – Loops
β†’ break, continue, pass – Loop control

⬇️ Advanced Concepts

Functions & Classes
β†’ def, return, lambda – Define functions
β†’ class, init, self – Object-oriented programming

Modules
β†’ import, from ... import – Reuse code

⬇️ Special Tools

Exception Handling
β†’ try, except, finally, raise – Handle errors

File Handling
β†’ open(), read(), write(), close() – Manage files

Decorators & Generators
β†’ @decorator, yield – Extend or pause functions

List Comprehension
β†’ [x for x in list if condition] – Create lists efficiently


Like for more ❀️
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Backend Development – Essential Concepts πŸš€

1️⃣ Backend vs. Frontend

Frontend – Handles UI/UX (HTML, CSS, JavaScript, React, Vue).

Backend – Manages server, database, APIs, and business logic.


2️⃣ Backend Programming Languages

Python – Django, Flask, FastAPI.

JavaScript – Node.js, Express.js.

Java – Spring Boot.

PHP – Laravel.

Ruby – Ruby on Rails.

Go – Gin, Echo.


3️⃣ Databases

SQL Databases – MySQL, PostgreSQL, MS SQL, MariaDB.

NoSQL Databases – MongoDB, Firebase, Cassandra, DynamoDB.

ORM (Object-Relational Mapping) – SQLAlchemy (Python), Sequelize (Node.js).


4️⃣ APIs & Web Services

REST API – Uses HTTP methods (GET, POST, PUT, DELETE).

GraphQL – Flexible API querying.

WebSockets – Real-time communication.

gRPC – High-performance communication.


5️⃣ Authentication & Security

JWT (JSON Web Token) – Secure user authentication.

OAuth 2.0 – Third-party authentication (Google, Facebook).

Hashing & Encryption – Protecting user data (bcrypt, AES).

CORS & CSRF Protection – Prevent security vulnerabilities.


6️⃣ Server & Hosting

Cloud Providers – AWS, Google Cloud, Azure.

Serverless Computing – AWS Lambda, Firebase Functions.

Docker & Kubernetes – Containerization and orchestration.


7️⃣ Caching & Performance Optimization

Redis & Memcached – Fast data caching.

Load Balancing – Distribute traffic efficiently.

CDN (Content Delivery Network) – Faster content delivery.


8️⃣ DevOps & Deployment

CI/CD Pipelines – GitHub Actions, Jenkins, GitLab CI.

Monitoring & Logging – Prometheus, ELK Stack.

Version Control – Git, GitHub, GitLab.

Like it if you need a complete tutorial on all these topics! πŸ‘β€οΈ

Web Development Best Resources

ENJOY LEARNING πŸ‘πŸ‘
πŸ‘2❀1
9 tips to learn Data Structures & Algorithms (DSA) effectively:

Master one language first (like Python, Java, or C++)

Start with basics: arrays, strings, linked lists

Practice consistently on coding platforms

Visualize problems to understand them better

Learn patterns β€” sliding window, two pointers, recursion

Understand time and space complexity

Solve problems before reading solutions

Revisit and revise tough problems

Build a strong foundation before diving into advanced topics

Coding Interview Resources:πŸ‘‡ https://whatsapp.com/channel/0029VammZijATRSlLxywEC3X

ENJOY LEARNING πŸ‘πŸ‘
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