โจ๏ธ MongoDB Cheat Sheet
This Post includes a MongoDB cheat sheet to make it easy for our followers to work with MongoDB.
Working with databases
Working with rows
Working with Documents
Querying data from documents
Modifying data in documents
Searching
MongoDB is a flexible, document-orientated, NoSQL database program that can scale to any enterprise volume without compromising search performance.
This Post includes a MongoDB cheat sheet to make it easy for our followers to work with MongoDB.
Working with databases
Working with rows
Working with Documents
Querying data from documents
Modifying data in documents
Searching
โค1
๐ง๐ผ๐ฝ ๐๐ผ๐บ๐ฝ๐ฎ๐ป๐ถ๐ฒ๐ ๐ข๐ณ๐ณ๐ฒ๐ฟ๐ถ๐ป๐ด ๐๐ฅ๐๐ ๐๐ฒ๐ฟ๐๐ถ๐ณ๐ถ๐ฐ๐ฎ๐๐ถ๐ผ๐ป๐ ๐
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๐ ๐ง๐ผ๐ฝ ๐๐ฎ๐๐ฎ ๐๐ป๐ฎ๐น๐๐๐ถ๐ฐ๐ ๐ฉ๐ถ๐ฟ๐๐๐ฎ๐น ๐๐ป๐๐ฒ๐ฟ๐ป๐๐ต๐ถ๐ฝ๐ โ ๐๐ฅ๐๐ & ๐ข๐ป๐น๐ถ๐ป๐ฒ๐
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๐ฐ C++ Roadmap for Beginners 2025
โโโ ๐ง Introduction to C++ & How It Works
โโโ ๐งฐ Setting Up Environment (IDE, Compiler)
โโโ ๐ Basic Syntax & Structure
โโโ ๐ข Variables, Data Types & Constants
โโโ โ Operators (Arithmetic, Relational, Logical, Bitwise)
โโโ ๐ Flow Control (if, else, switch)
โโโ ๐ Loops (for, while, do...while)
โโโ ๐งฉ Functions (Declaration, Definition, Recursion)
โโโ ๐ฆ Arrays, Strings & Vectors
โโโ ๐งฑ Pointers & References
โโโ ๐งฎ Dynamic Memory Allocation (new, delete)
โโโ ๐ Structures & Unions
โโโ ๐ Object-Oriented Programming (Classes, Objects, Inheritance, Polymorphism)
โโโ ๐ File Handling in C++
โโโ โ ๏ธ Exception Handling
โโโ ๐ง STL (Standard Template Library - vector, map, set, etc.)
โโโ ๐งช Mini Projects (Bank System, Student Record, etc.)
Like for the detailed explanation โค๏ธ
#c #programming
โโโ ๐ง Introduction to C++ & How It Works
โโโ ๐งฐ Setting Up Environment (IDE, Compiler)
โโโ ๐ Basic Syntax & Structure
โโโ ๐ข Variables, Data Types & Constants
โโโ โ Operators (Arithmetic, Relational, Logical, Bitwise)
โโโ ๐ Flow Control (if, else, switch)
โโโ ๐ Loops (for, while, do...while)
โโโ ๐งฉ Functions (Declaration, Definition, Recursion)
โโโ ๐ฆ Arrays, Strings & Vectors
โโโ ๐งฑ Pointers & References
โโโ ๐งฎ Dynamic Memory Allocation (new, delete)
โโโ ๐ Structures & Unions
โโโ ๐ Object-Oriented Programming (Classes, Objects, Inheritance, Polymorphism)
โโโ ๐ File Handling in C++
โโโ โ ๏ธ Exception Handling
โโโ ๐ง STL (Standard Template Library - vector, map, set, etc.)
โโโ ๐งช Mini Projects (Bank System, Student Record, etc.)
Like for the detailed explanation โค๏ธ
#c #programming
โค2
๐๐ฅ๐๐ ๐ข๐ป๐น๐ถ๐ป๐ฒ ๐๐ผ๐๐ฟ๐๐ฒ๐ ๐ง๐ผ ๐๐ป๐ฟ๐ผ๐น๐น ๐๐ป ๐ฎ๐ฌ๐ฎ๐ฑ ๐
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Learn Fundamental Skills with Free Online Courses & Earn Certificates
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App Development Roadmap (2025)
Step-1 Plan Your Idea โ Define the app's purpose, features, and target audience.
Step-2 Learn Programming Basics โ Start with Python, Java, Swift, or Kotlin.
Step-3 Design UI/UX โ Create wireframes using tools like Figma or Adobe XD.
Step-4 Frontend Development โ Learn HTML, CSS, and JavaScript for web apps.
Step-5 Backend Development โ Master server-side languages (e.g., Python with Flask/Django or Node.js).
Step-6 APIs โ Integrate APIs to add functionality (e.g., payments, maps).
Step-7 Databases โ Work with SQL (MySQL/PostgreSQL) or NoSQL (MongoDB).
Step-8 Mobile Development โ Learn Swift for iOS or Kotlin for Android apps.
Step-9 Cross-Platform Tools โ Explore Flutter or React Native for both iOS and Android.
Step-10 Testing โ Perform unit & integration testing.
Step-11 Deployment โ Publish apps on app stores or deploy web apps to platforms like AWS/Heroku.
๐ Start Developing Apps Today! ๐
Step-1 Plan Your Idea โ Define the app's purpose, features, and target audience.
Step-2 Learn Programming Basics โ Start with Python, Java, Swift, or Kotlin.
Step-3 Design UI/UX โ Create wireframes using tools like Figma or Adobe XD.
Step-4 Frontend Development โ Learn HTML, CSS, and JavaScript for web apps.
Step-5 Backend Development โ Master server-side languages (e.g., Python with Flask/Django or Node.js).
Step-6 APIs โ Integrate APIs to add functionality (e.g., payments, maps).
Step-7 Databases โ Work with SQL (MySQL/PostgreSQL) or NoSQL (MongoDB).
Step-8 Mobile Development โ Learn Swift for iOS or Kotlin for Android apps.
Step-9 Cross-Platform Tools โ Explore Flutter or React Native for both iOS and Android.
Step-10 Testing โ Perform unit & integration testing.
Step-11 Deployment โ Publish apps on app stores or deploy web apps to platforms like AWS/Heroku.
๐ Start Developing Apps Today! ๐
โค3
Forwarded from Python Projects & Resources
๐ฆ๐๐ฎ๐ฟ๐ ๐ฎ ๐๐ฎ๐ฟ๐ฒ๐ฒ๐ฟ ๐ถ๐ป ๐๐ฎ๐๐ฎ ๐ผ๐ฟ ๐ง๐ฒ๐ฐ๐ต (๐๐ฟ๐ฒ๐ฒ ๐๐ฒ๐ด๐ถ๐ป๐ป๐ฒ๐ฟ ๐๐ฒ๐ฎ๐ฟ๐ป๐ถ๐ป๐ด ๐ฃ๐ฎ๐๐ต)๐
Dreaming of a career in data or tech but donโt know where to begin?๐จโ๐ป๐
Donโt worry โ this step-by-step FREE learning path will guide you from scratch to job-ready, without spending a rupee! ๐ป๐ผ
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โค2
Common Programming Interview Questions
How do you reverse a string?
How do you determine if a string is a palindrome?
How do you calculate the number of numerical digits in a string?
How do you find the count for the occurrence of a particular character in a string?
How do you find the non-matching characters in a string?
How do you find out if the two given strings are anagrams?
How do you calculate the number of vowels and consonants in a string?
How do you total all of the matching integer elements in an array?
How do you reverse an array?
How do you find the maximum element in an array?
How do you sort an array of integers in ascending order?
How do you print a Fibonacci sequence using recursion?
How do you calculate the sum of two integers?
How do you find the average of numbers in a list?
How do you check if an integer is even or odd?
How do you find the middle element of a linked list?
How do you remove a loop in a linked list?
How do you merge two sorted linked lists?
How do you implement binary search to find an element in a sorted array?
How do you print a binary tree in vertical order?
Conceptual Coding Interview Questions
What is a data structure?
What is an array?
What is a linked list?
What is the difference between an array and a linked list?
What is LIFO?
What is FIFO?
What is a stack?
What are binary trees?
What are binary search trees?
What is object-oriented programming?
What is the purpose of a loop in programming?
What is a conditional statement?
What is debugging?
What is recursion?
What are the differences between linear and non-linear data structures?
General Coding Interview Questions
What programming languages do you have experience working with?
Describe a time you faced a challenge in a project you were working on and how you overcame it.
Walk me through a project youโre currently or have recently worked on.
Give an example of a project you worked on where you had to learn a new programming language or technology. How did you go about learning it?
How do you ensure your code is readable by other developers?
What are your interests outside of programming?
How do you keep your skills sharp and up to date?
How do you collaborate on projects with non-technical team members?
Tell me about a time when you had to explain a complex technical concept to a non-technical team member.
How do you get started on a new coding project?
Best Programming Resources: https://topmate.io/coding/886839
Join for more: https://t.me/programming_guide
ENJOY LEARNING ๐๐
How do you reverse a string?
How do you determine if a string is a palindrome?
How do you calculate the number of numerical digits in a string?
How do you find the count for the occurrence of a particular character in a string?
How do you find the non-matching characters in a string?
How do you find out if the two given strings are anagrams?
How do you calculate the number of vowels and consonants in a string?
How do you total all of the matching integer elements in an array?
How do you reverse an array?
How do you find the maximum element in an array?
How do you sort an array of integers in ascending order?
How do you print a Fibonacci sequence using recursion?
How do you calculate the sum of two integers?
How do you find the average of numbers in a list?
How do you check if an integer is even or odd?
How do you find the middle element of a linked list?
How do you remove a loop in a linked list?
How do you merge two sorted linked lists?
How do you implement binary search to find an element in a sorted array?
How do you print a binary tree in vertical order?
Conceptual Coding Interview Questions
What is a data structure?
What is an array?
What is a linked list?
What is the difference between an array and a linked list?
What is LIFO?
What is FIFO?
What is a stack?
What are binary trees?
What are binary search trees?
What is object-oriented programming?
What is the purpose of a loop in programming?
What is a conditional statement?
What is debugging?
What is recursion?
What are the differences between linear and non-linear data structures?
General Coding Interview Questions
What programming languages do you have experience working with?
Describe a time you faced a challenge in a project you were working on and how you overcame it.
Walk me through a project youโre currently or have recently worked on.
Give an example of a project you worked on where you had to learn a new programming language or technology. How did you go about learning it?
How do you ensure your code is readable by other developers?
What are your interests outside of programming?
How do you keep your skills sharp and up to date?
How do you collaborate on projects with non-technical team members?
Tell me about a time when you had to explain a complex technical concept to a non-technical team member.
How do you get started on a new coding project?
Best Programming Resources: https://topmate.io/coding/886839
Join for more: https://t.me/programming_guide
ENJOY LEARNING ๐๐
โค1๐ฅ1
Forwarded from Python Projects & Resources
๐๐๐ฆ๐๐ข ๐๐ฅ๐๐ ๐๐ฒ๐ฟ๐๐ถ๐ณ๐ถ๐ฐ๐ฎ๐๐ถ๐ผ๐ป ๐๐ผ๐๐ฟ๐๐ฒ๐๐
- Data Analytics
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โค3
๐๐๐ญ๐ ๐๐ง๐๐ฅ๐ฒ๐ฌ๐ญ ๐ฏ๐ฌ. ๐๐๐ญ๐ ๐๐๐ข๐๐ง๐ญ๐ข๐ฌ๐ญ โ ๐๐ก๐๐ญโ๐ฌ ๐ญ๐ก๐ ๐๐ข๐๐๐๐ซ๐๐ง๐๐?
Whether you're starting a career in data or looking to pivot, itโs crucial to understand the key differences between a Data Analyst and a Data Scientist:
๐ ๐ ๐จ๐๐ฎ๐ฌ
Data Analyst: Interprets existing data to uncover insights.
Data Scientist: Predicts future trends using advanced models.
๐ ๏ธ ๐๐จ๐จ๐ฅ๐ฌ ๐๐ฌ๐๐
Data Analyst: Excel, SQL, Tableau
Data Scientist: Python, R, Machine Learning tools
๐ผ ๐๐ฒ๐ฉ๐ ๐จ๐ ๐๐จ๐ซ๐ค
Data Analyst: Reporting and dashboarding
Data Scientist: Building models and algorithms
๐ง ๐๐ค๐ข๐ฅ๐ฅ๐ฌ๐๐ญ
Data Analyst: Data cleaning, visualization
Data Scientist: Data-driven product development and strategy
Both roles are essentialโbut they serve different purposes. One tells you what happened, the other helps you decide what to do next.
Whether you're starting a career in data or looking to pivot, itโs crucial to understand the key differences between a Data Analyst and a Data Scientist:
๐ ๐ ๐จ๐๐ฎ๐ฌ
Data Analyst: Interprets existing data to uncover insights.
Data Scientist: Predicts future trends using advanced models.
๐ ๏ธ ๐๐จ๐จ๐ฅ๐ฌ ๐๐ฌ๐๐
Data Analyst: Excel, SQL, Tableau
Data Scientist: Python, R, Machine Learning tools
๐ผ ๐๐ฒ๐ฉ๐ ๐จ๐ ๐๐จ๐ซ๐ค
Data Analyst: Reporting and dashboarding
Data Scientist: Building models and algorithms
๐ง ๐๐ค๐ข๐ฅ๐ฅ๐ฌ๐๐ญ
Data Analyst: Data cleaning, visualization
Data Scientist: Data-driven product development and strategy
Both roles are essentialโbut they serve different purposes. One tells you what happened, the other helps you decide what to do next.
โค1
Forwarded from Artificial Intelligence
๐๐ฎ๐๐ฎ ๐๐ป๐ฎ๐น๐๐๐ถ๐ฐ๐ ๐๐ฅ๐๐ ๐ฅ๐ผ๐ฎ๐ฑ๐บ๐ฎ๐ฝ ,๐๐ฒ๐ฟ๐๐ถ๐ณ๐ถ๐ฐ๐ฎ๐๐ถ๐ผ๐ป๐ ,๐ฃ๐ฟ๐ผ๐ท๐ฒ๐ฐ๐๐ & ๐๐ป๐๐ฒ๐ฟ๐๐ถ๐ฒ๐ ๐๐๐ถ๐ฑ๐ฒ๐
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Projects:- https://pdlink.in/3ZkXetO
Interview Q/A :- https://pdlink.in/4jLOJ2a
Enroll For FREE & Become a Certified Data Analyst In 2025๐
โค3
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๐น 2000+ Students Placed
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โค2
Forwarded from Python Projects & Resources
๐๐ป๐ฑ๐๐๐๐ฟ๐ ๐๐ฝ๐ฝ๐ฟ๐ผ๐๐ฒ๐ฑ ๐๐ฅ๐๐ ๐๐ฒ๐ฟ๐๐ถ๐ณ๐ถ๐ฐ๐ฎ๐๐ถ๐ผ๐ป๐ ๐
Whether youโre interested in AI, Data Analytics, Cybersecurity, or Cloud Computing, thereโs something here for everyone.
โ 100% Free Courses
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Enroll for FREE & Get Certified ๐
Whether youโre interested in AI, Data Analytics, Cybersecurity, or Cloud Computing, thereโs something here for everyone.
โ 100% Free Courses
โ Govt. Incentives on Completion
โ Self-paced Learning
โ Certificates to Showcase on LinkedIn & Resume
โ Mock Assessments to Test Your Skills
๐๐ข๐ง๐ค ๐:-
https://pdlink.in/447coEk
Enroll for FREE & Get Certified ๐
โค1
Master Javascript :
The JavaScript Tree ๐
|
|โโ Variables
| โโโ var
| โโโ let
| โโโ const
|
|โโ Data Types
| โโโ String
| โโโ Number
| โโโ Boolean
| โโโ Object
| โโโ Array
| โโโ Null
| โโโ Undefined
|
|โโ Operators
| โโโ Arithmetic
| โโโ Assignment
| โโโ Comparison
| โโโ Logical
| โโโ Unary
| โโโ Ternary (Conditional)
||โโ Control Flow
| โโโ if statement
| โโโ else statement
| โโโ else if statement
| โโโ switch statement
| โโโ for loop
| โโโ while loop
| โโโ do-while loop
|
|โโ Functions
| โโโ Function declaration
| โโโ Function expression
| โโโ Arrow function
| โโโ IIFE (Immediately Invoked Function Expression)
|
|โโ Scope
| โโโ Global scope
| โโโ Local scope
| โโโ Block scope
| โโโ Lexical scope
||โโ Arrays
| โโโ Array methods
| | โโโ push()
| | โโโ pop()
| | โโโ shift()
| | โโโ unshift()
| | โโโ splice()
| | โโโ slice()
| | โโโ concat()
| โโโ Array iteration
| โโโ forEach()
| โโโ map()
| โโโ filter()
| โโโ reduce()|
|โโ Objects
| โโโ Object properties
| | โโโ Dot notation
| | โโโ Bracket notation
| โโโ Object methods
| | โโโ Object.keys()
| | โโโ Object.values()
| | โโโ Object.entries()
| โโโ Object destructuring
||โโ Promises
| โโโ Promise states
| | โโโ Pending
| | โโโ Fulfilled
| | โโโ Rejected
| โโโ Promise methods
| | โโโ then()
| | โโโ catch()
| | โโโ finally()
| โโโ Promise.all()
|
|โโ Asynchronous JavaScript
| โโโ Callbacks
| โโโ Promises
| โโโ Async/Await
|
|โโ Error Handling
| โโโ try...catch statement
| โโโ throw statement
|
|โโ JSON (JavaScript Object Notation)
||โโ Modules
| โโโ import
| โโโ export
|
|โโ DOM Manipulation
| โโโ Selecting elements
| โโโ Modifying elements
| โโโ Creating elements
|
|โโ Events
| โโโ Event listeners
| โโโ Event propagation
| โโโ Event delegation
|
|โโ AJAX (Asynchronous JavaScript and XML)
|
|โโ Fetch API
||โโ ES6+ Features
| โโโ Template literals
| โโโ Destructuring assignment
| โโโ Spread/rest operator
| โโโ Arrow functions
| โโโ Classes
| โโโ let and const
| โโโ Default parameters
| โโโ Modules
| โโโ Promises
|
|โโ Web APIs
| โโโ Local Storage
| โโโ Session Storage
| โโโ Web Storage API
|
|โโ Libraries and Frameworks
| โโโ React
| โโโ Angular
| โโโ Vue.js
||โโ Debugging
| โโโ Console.log()
| โโโ Breakpoints
| โโโ DevTools
|
|โโ Others
| โโโ Closures
| โโโ Callbacks
| โโโ Prototypes
| โโโ this keyword
| โโโ Hoisting
| โโโ Strict mode
|
| END __
The JavaScript Tree ๐
|
|โโ Variables
| โโโ var
| โโโ let
| โโโ const
|
|โโ Data Types
| โโโ String
| โโโ Number
| โโโ Boolean
| โโโ Object
| โโโ Array
| โโโ Null
| โโโ Undefined
|
|โโ Operators
| โโโ Arithmetic
| โโโ Assignment
| โโโ Comparison
| โโโ Logical
| โโโ Unary
| โโโ Ternary (Conditional)
||โโ Control Flow
| โโโ if statement
| โโโ else statement
| โโโ else if statement
| โโโ switch statement
| โโโ for loop
| โโโ while loop
| โโโ do-while loop
|
|โโ Functions
| โโโ Function declaration
| โโโ Function expression
| โโโ Arrow function
| โโโ IIFE (Immediately Invoked Function Expression)
|
|โโ Scope
| โโโ Global scope
| โโโ Local scope
| โโโ Block scope
| โโโ Lexical scope
||โโ Arrays
| โโโ Array methods
| | โโโ push()
| | โโโ pop()
| | โโโ shift()
| | โโโ unshift()
| | โโโ splice()
| | โโโ slice()
| | โโโ concat()
| โโโ Array iteration
| โโโ forEach()
| โโโ map()
| โโโ filter()
| โโโ reduce()|
|โโ Objects
| โโโ Object properties
| | โโโ Dot notation
| | โโโ Bracket notation
| โโโ Object methods
| | โโโ Object.keys()
| | โโโ Object.values()
| | โโโ Object.entries()
| โโโ Object destructuring
||โโ Promises
| โโโ Promise states
| | โโโ Pending
| | โโโ Fulfilled
| | โโโ Rejected
| โโโ Promise methods
| | โโโ then()
| | โโโ catch()
| | โโโ finally()
| โโโ Promise.all()
|
|โโ Asynchronous JavaScript
| โโโ Callbacks
| โโโ Promises
| โโโ Async/Await
|
|โโ Error Handling
| โโโ try...catch statement
| โโโ throw statement
|
|โโ JSON (JavaScript Object Notation)
||โโ Modules
| โโโ import
| โโโ export
|
|โโ DOM Manipulation
| โโโ Selecting elements
| โโโ Modifying elements
| โโโ Creating elements
|
|โโ Events
| โโโ Event listeners
| โโโ Event propagation
| โโโ Event delegation
|
|โโ AJAX (Asynchronous JavaScript and XML)
|
|โโ Fetch API
||โโ ES6+ Features
| โโโ Template literals
| โโโ Destructuring assignment
| โโโ Spread/rest operator
| โโโ Arrow functions
| โโโ Classes
| โโโ let and const
| โโโ Default parameters
| โโโ Modules
| โโโ Promises
|
|โโ Web APIs
| โโโ Local Storage
| โโโ Session Storage
| โโโ Web Storage API
|
|โโ Libraries and Frameworks
| โโโ React
| โโโ Angular
| โโโ Vue.js
||โโ Debugging
| โโโ Console.log()
| โโโ Breakpoints
| โโโ DevTools
|
|โโ Others
| โโโ Closures
| โโโ Callbacks
| โโโ Prototypes
| โโโ this keyword
| โโโ Hoisting
| โโโ Strict mode
|
| END __
โค4
Forwarded from Python Projects & Resources
๐ง๐ผ๐ฝ ๐๐ผ๐บ๐ฝ๐ฎ๐ป๐ถ๐ฒ๐ & ๐๐ฒ๐ฎ๐ฑ๐ถ๐ป๐ด ๐๐ผ๐บ๐ฝ๐ฎ๐ป๐ถ๐ฒ๐ ๐ข๐ณ๐ณ๐ฒ๐ฟ๐ถ๐ป๐ด ๐๐ฅ๐๐ ๐๐ฒ๐ฟ๐๐ถ๐ณ๐ถ๐ฐ๐ฎ๐๐ถ๐ผ๐ป ๐๐ผ๐๐ฟ๐๐ฒ๐ ๐
Harward :- https://pdlink.in/4kmYOn1
MIT :- https://pdlink.in/45cvR95
HP :- https://pdlink.in/45ci02k
Google :- https://pdlink.in/3YsujTV
Microsoft :- https://pdlink.in/441GCKF
Standford :- https://pdlink.in/3ThPwNw
IIM :- https://pdlink.in/4nfXDrV
Enroll for FREE & Get Certified ๐
Harward :- https://pdlink.in/4kmYOn1
MIT :- https://pdlink.in/45cvR95
HP :- https://pdlink.in/45ci02k
Google :- https://pdlink.in/3YsujTV
Microsoft :- https://pdlink.in/441GCKF
Standford :- https://pdlink.in/3ThPwNw
IIM :- https://pdlink.in/4nfXDrV
Enroll for FREE & Get Certified ๐
Important questions to ace your machine learning interview with an approach to answer:
1. Machine Learning Project Lifecycle:
- Define the problem
- Gather and preprocess data
- Choose a model and train it
- Evaluate model performance
- Tune and optimize the model
- Deploy and maintain the model
2. Supervised vs Unsupervised Learning:
- Supervised Learning: Uses labeled data for training (e.g., predicting house prices from features).
- Unsupervised Learning: Uses unlabeled data to find patterns or groupings (e.g., clustering customer segments).
3. Evaluation Metrics for Regression:
- Mean Absolute Error (MAE)
- Mean Squared Error (MSE)
- Root Mean Squared Error (RMSE)
- R-squared (coefficient of determination)
4. Overfitting and Prevention:
- Overfitting: Model learns the noise instead of the underlying pattern.
- Prevention: Use simpler models, cross-validation, regularization.
5. Bias-Variance Tradeoff:
- Balancing error due to bias (underfitting) and variance (overfitting) to find an optimal model complexity.
6. Cross-Validation:
- Technique to assess model performance by splitting data into multiple subsets for training and validation.
7. Feature Selection Techniques:
- Filter methods (e.g., correlation analysis)
- Wrapper methods (e.g., recursive feature elimination)
- Embedded methods (e.g., Lasso regularization)
8. Assumptions of Linear Regression:
- Linearity
- Independence of errors
- Homoscedasticity (constant variance)
- No multicollinearity
9. Regularization in Linear Models:
- Adds a penalty term to the loss function to prevent overfitting by shrinking coefficients.
10. Classification vs Regression:
- Classification: Predicts a categorical outcome (e.g., class labels).
- Regression: Predicts a continuous numerical outcome (e.g., house price).
11. Dimensionality Reduction Algorithms:
- Principal Component Analysis (PCA)
- t-Distributed Stochastic Neighbor Embedding (t-SNE)
12. Decision Tree:
- Tree-like model where internal nodes represent features, branches represent decisions, and leaf nodes represent outcomes.
13. Ensemble Methods:
- Combine predictions from multiple models to improve accuracy (e.g., Random Forest, Gradient Boosting).
14. Handling Missing or Corrupted Data:
- Imputation (e.g., mean substitution)
- Removing rows or columns with missing data
- Using algorithms robust to missing values
15. Kernels in Support Vector Machines (SVM):
- Linear kernel
- Polynomial kernel
- Radial Basis Function (RBF) kernel
Data Science Interview Resources
๐๐
https://topmate.io/coding/914624
Like for more ๐
1. Machine Learning Project Lifecycle:
- Define the problem
- Gather and preprocess data
- Choose a model and train it
- Evaluate model performance
- Tune and optimize the model
- Deploy and maintain the model
2. Supervised vs Unsupervised Learning:
- Supervised Learning: Uses labeled data for training (e.g., predicting house prices from features).
- Unsupervised Learning: Uses unlabeled data to find patterns or groupings (e.g., clustering customer segments).
3. Evaluation Metrics for Regression:
- Mean Absolute Error (MAE)
- Mean Squared Error (MSE)
- Root Mean Squared Error (RMSE)
- R-squared (coefficient of determination)
4. Overfitting and Prevention:
- Overfitting: Model learns the noise instead of the underlying pattern.
- Prevention: Use simpler models, cross-validation, regularization.
5. Bias-Variance Tradeoff:
- Balancing error due to bias (underfitting) and variance (overfitting) to find an optimal model complexity.
6. Cross-Validation:
- Technique to assess model performance by splitting data into multiple subsets for training and validation.
7. Feature Selection Techniques:
- Filter methods (e.g., correlation analysis)
- Wrapper methods (e.g., recursive feature elimination)
- Embedded methods (e.g., Lasso regularization)
8. Assumptions of Linear Regression:
- Linearity
- Independence of errors
- Homoscedasticity (constant variance)
- No multicollinearity
9. Regularization in Linear Models:
- Adds a penalty term to the loss function to prevent overfitting by shrinking coefficients.
10. Classification vs Regression:
- Classification: Predicts a categorical outcome (e.g., class labels).
- Regression: Predicts a continuous numerical outcome (e.g., house price).
11. Dimensionality Reduction Algorithms:
- Principal Component Analysis (PCA)
- t-Distributed Stochastic Neighbor Embedding (t-SNE)
12. Decision Tree:
- Tree-like model where internal nodes represent features, branches represent decisions, and leaf nodes represent outcomes.
13. Ensemble Methods:
- Combine predictions from multiple models to improve accuracy (e.g., Random Forest, Gradient Boosting).
14. Handling Missing or Corrupted Data:
- Imputation (e.g., mean substitution)
- Removing rows or columns with missing data
- Using algorithms robust to missing values
15. Kernels in Support Vector Machines (SVM):
- Linear kernel
- Polynomial kernel
- Radial Basis Function (RBF) kernel
Data Science Interview Resources
๐๐
https://topmate.io/coding/914624
Like for more ๐
โค2
๐๐ข๐๐ซ๐จ๐ฌ๐จ๐๐ญ ๐
๐๐๐ ๐๐๐ซ๐ญ๐ข๐๐ข๐๐๐ญ๐ข๐จ๐ง ๐๐จ๐ฎ๐ซ๐ฌ๐๐ฌ!๐๐ป
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๐๐ง๐ซ๐จ๐ฅ๐ฅ ๐ ๐จ๐ซ ๐ ๐๐๐๐ :-
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- Earn certifications to showcase your skills
Donโt waitโstart your journey to success today! โจ
Supercharge your career with 5 FREE Microsoft certification courses designed to boost your data analytics skills!
๐๐ง๐ซ๐จ๐ฅ๐ฅ ๐ ๐จ๐ซ ๐ ๐๐๐๐ :-
https://bit.ly/3Vlixcq
- Earn certifications to showcase your skills
Donโt waitโstart your journey to success today! โจ
โค4