Machine Learning
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Machine learning insights, practical tutorials, and clear explanations for beginners and aspiring data scientists. Follow the channel for models, algorithms, coding guides, and real-world ML applications.

Admin: @HusseinSheikho || @Hussein_Sheikho
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19. Why is cross-entropy preferred over accuracy as a training objective?
A. Accuracy is non-differentiable
B. Accuracy requires larger datasets
C. Cross-entropy reduces model size
D. Cross-entropy prevents overfitting

Correct answer: A.

20. What is the core assumption behind convolutional neural networks?
A. Features are independent
B. Data is linearly separable
C. Local patterns are spatially correlated
D. Labels are mutually exclusive

Correct answer: C.

https://t.me/DataScienceM
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100+ LLM Interview Questions and Answers (GitHub Repo)

Anyone preparing for #AI/#ML Interviews, it is mandatory to have good knowledge related to #LLM topics.

This# repo includes 100+ LLM interview questions (with answers) spanning over LLM topics like
LLM Inference
LLM Fine-Tuning
LLM Architectures
LLM Pretraining
Prompt Engineering
etc.

๐Ÿ–• Github Repo - https://github.com/KalyanKS-NLP/LLM-Interview-Questions-and-Answers-Hub

https://t.me/DataScienceM โœ…
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๐Ÿš€ Top 9 Predictive Models Every Data Scientist Should Know in 2025

In the world of Machine Learning, selecting the right predictive model is crucial for solving real-world problems effectively.

Hereโ€™s a deep dive into the top 9 models and when to use them :-

1๏ธโƒฃ Regularized Linear/Logistic Regression

โ€ข Best for: Tabular data with mostly linear effects
โ€ข Why: Fast, interpretable, strong baseline
โ€ข Watch out: Multicollinearity, feature scaling
โ€ข Key knobs: L1/L2/Elastic Net strength

2๏ธโƒฃ Decision Trees

โ€ข Best for: Simple rules and quick interpretability
โ€ข Why: Captures nonlinearity and feature interactions
โ€ข Watch out: Overfitting
โ€ข Key knobs: max_depth, min_samples_leaf

3๏ธโƒฃ Random Forest

โ€ข Best for: Mixed-type tabular data
โ€ข Why: Robust, handles missingness, low tuning effort
โ€ข Watch out: Slower inference for large models
โ€ข Key knobs: n_estimators, max_features

4๏ธโƒฃ Gradient Boosting Trees

โ€ข Best for: Structured data requiring top performance
โ€ข Why: Handles complex patterns and interactions
โ€ข Watch out: Overfitting if not tuned carefully
โ€ข Key knobs: learning_rate, n_estimators, max_depth, regularization

5๏ธโƒฃ Support Vector Machines (linear/RBF)

โ€ข Best for: Medium-sized datasets with clear margins
โ€ข Why: Strong performance after scaling
โ€ข Watch out: Kernel choice and cost at scale
โ€ข Key knobs: C, kernel, gamma

6๏ธโƒฃ k-Nearest Neighbors (k-NN)

โ€ข Best for: Small datasets with local structure
โ€ข Why: Simple, non-parametric
โ€ข Watch out: Poor scaling, sensitive to feature scaling
โ€ข Key knobs: k, distance metric, weighting

7๏ธโƒฃ Naive Bayes

โ€ข Best for: High-dimensional sparse features (like text)
โ€ข Why: Very fast, competitive for many applications
โ€ข Watch out: Independence assumption
โ€ข Key knobs: smoothing (alpha)

8๏ธโƒฃ Multilayer Perceptrons (Feedforward Neural Networks)

โ€ข Best for: Nonlinear relationships with sufficient data & compute
โ€ข Why: Flexible universal approximators
โ€ข Watch out: Tuning, overfitting without regularization
โ€ข Key knobs: layers/neurons, dropout, learning rate

9๏ธโƒฃ Classical Time-Series Models

โ€ข Best for: Univariate or small-multivariate forecasting with seasonality
โ€ข Why: Transparent baselines, good for limited data
โ€ข Watch out: Stationarity, careful feature engineering
โ€ข Key knobs: (p, d, q), seasonal terms, exogenous variables

๐Ÿ’ก Pro Tip: Each model has its strengths and trade-offs. Understanding when to use which model and how to tune its hyperparameters is key to building robust and interpretable predictive systems.

https://t.me/DataScienceM โœ…
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๐Ÿ“Œ 4 Ways to Supercharge Your Data Science Workflow with Google AI Studio

๐Ÿ—‚ Category: LLM APPLICATIONS

๐Ÿ•’ Date: 2025-12-18 | โฑ๏ธ Read time: 11 min read

With concrete examples of using AI Studio Build mode to learn faster, prototype smarter, communicateโ€ฆ

#DataScience #AI #Python
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๐Ÿ“Œ The Subset Sum Problem Solved in Linear Time for Dense Enough Inputs

๐Ÿ—‚ Category: ALGORITHMS

๐Ÿ•’ Date: 2025-12-18 | โฑ๏ธ Read time: 31 min read

An optimal solution to the well-known NP-complete problem, when the input values are close enoughโ€ฆ

#DataScience #AI #Python
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๐Ÿ“Œ Generating Artwork in Python Inspired by Hirstโ€™s Million-Dollar Spots Painting

๐Ÿ—‚ Category: PROGRAMMING

๐Ÿ•’ Date: 2025-12-18 | โฑ๏ธ Read time: 6 min read

Using Python to generate art

#DataScience #AI #Python
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๐Ÿ“Œ The Machine Learning โ€œAdvent Calendarโ€ Day 18: Neural Network Classifier in Excel

๐Ÿ—‚ Category: MACHINE LEARNING

๐Ÿ•’ Date: 2025-12-18 | โฑ๏ธ Read time: 12 min read

Understanding forward propagation and backpropagation through explicit formulas

#DataScience #AI #Python
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๐Ÿ“Œ The Machine Learning โ€œAdvent Calendarโ€ Day 19: Bagging in Excel

๐Ÿ—‚ Category: MACHINE LEARNING

๐Ÿ•’ Date: 2025-12-19 | โฑ๏ธ Read time: 11 min read

Understanding ensemble learning from first principles in Excel

#DataScience #AI #Python
๐Ÿ“Œ Agentic AI Swarm Optimization using Artificial Bee Colonization (ABC)

๐Ÿ—‚ Category: AGENTIC AI

๐Ÿ•’ Date: 2025-12-19 | โฑ๏ธ Read time: 27 min read

Using Agentic AI prompts with the Artificial Bee Colony algorithm to enhance unsupervised clustering andโ€ฆ

#DataScience #AI #Python
๐Ÿ“Œ How I Optimized My Leaf Raking Strategy Using Linear Programming

๐Ÿ—‚ Category: DATA SCIENCE

๐Ÿ•’ Date: 2025-12-19 | โฑ๏ธ Read time: 13 min read

From a weekend chore to a fun application of valuable operations research principles

#DataScience #AI #Python
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๐Ÿ“Œ Six Lessons Learned Building RAG Systems in Production

๐Ÿ—‚ Category: LARGE LANGUAGE MODELS

๐Ÿ•’ Date: 2025-12-19 | โฑ๏ธ Read time: 10 min read

Best practices for data quality, retrieval design, and evaluation in production RAG systems

#DataScience #AI #Python
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๐Ÿš€Stanford just completed a must-watch for anyone serious about AI:

๐ŸŽ“ โ€œ๐—–๐— ๐—˜ ๐Ÿฎ๐Ÿต๐Ÿฑ: ๐—ง๐—ฟ๐—ฎ๐—ป๐˜€๐—ณ๐—ผ๐—ฟ๐—บ๐—ฒ๐—ฟ๐˜€ & ๐—Ÿ๐—ฎ๐—ฟ๐—ด๐—ฒ ๐—Ÿ๐—ฎ๐—ป๐—ด๐˜‚๐—ฎ๐—ด๐—ฒ ๐— ๐—ผ๐—ฑ๐—ฒ๐—น๐˜€โ€ is now live entirely on YouTube and itโ€™s pure gold.

If youโ€™re building your AI career, stop scrolling.
This isnโ€™t another surface-level overview. Itโ€™s the clearest, most structured intro to LLMs you could follow, straight from the Stanford Autumn 2025 curriculum.

๐Ÿ“š ๐—ง๐—ผ๐—ฝ๐—ถ๐—ฐ๐˜€ ๐—ฐ๐—ผ๐˜ƒ๐—ฒ๐—ฟ๐—ฒ๐—ฑ ๐—ถ๐—ป๐—ฐ๐—น๐˜‚๐—ฑ๐—ฒ:
โ€ข How Transformers actually work (tokenization, attention, embeddings)
โ€ข Decoding strategies & MoEs
โ€ข LLM finetuning (LoRA, RLHF, supervised)
โ€ข Evaluation techniques (LLM-as-a-judge)
โ€ข Optimization tricks (RoPE, quantization, approximations)
โ€ข Reasoning & scaling
โ€ข Agentic workflows (RAG, tool calling)

๐Ÿง  My workflow: I usually take the transcripts, feed them into NotebookLM, and once Iโ€™ve done the lectures, I replay them during walks or commutes. That combo works wonders for retention.

๐ŸŽฅ Watch these now:

- Lecture 1: https://lnkd.in/dDER-qyp
- Lecture 2: https://lnkd.in/dk-tGUDm
- Lecture 3: https://lnkd.in/drAPdjJY
- Lecture 4: https://lnkd.in/e_RSgMz7
- Lecture 5: https://lnkd.in/eivMA9pe
- Lecture 6: https://lnkd.in/eYwwwMXn
- Lecture 7: https://lnkd.in/eKwkEDXV
- Lecture 8: https://lnkd.in/eEWvyfyK
- Lecture 9: https://lnkd.in/euiKRGaQ

๐Ÿ—“ Do yourself a favor for this 2026: block 2-3 hours per week / llectue and go through them.

If youโ€™re in AI โ€” whether building infra, agents, or apps โ€” this is the foundational course you donโ€™t want to miss.

Letโ€™s level up.
https://t.me/CodeProgrammer ๐Ÿ˜…
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๐Ÿ“Œ Understanding the Generative AI User

๐Ÿ—‚ Category: PRODUCT MANAGEMENT

๐Ÿ•’ Date: 2025-12-20 | โฑ๏ธ Read time: 11 min read

What do regular technology users think (and know) about AI?

#DataScience #AI #Python
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๐Ÿ“Œ EDA in Public (Part 2): Product Deep Dive & Time-Series Analysis in Pandas

๐Ÿ—‚ Category: DATA SCIENCE

๐Ÿ•’ Date: 2025-12-20 | โฑ๏ธ Read time: 9 min read

Learn how to analyze product performance, extract time-series features, and uncover key seasonal trends inโ€ฆ

#DataScience #AI #Python
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๐Ÿ“Œ Tools for Your LLM: a Deep Dive into MCP

๐Ÿ—‚ Category: LLM APPLICATIONS

๐Ÿ•’ Date: 2025-12-21 | โฑ๏ธ Read time: 8 min read

MCP is a key enabler into turning your LLM into an agent by providing itโ€ฆ

#DataScience #AI #Python
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๐Ÿ“Œ How to Do Evals on a Bloated RAG Pipeline

๐Ÿ—‚ Category: LARGE LANGUAGE MODELS

๐Ÿ•’ Date: 2025-12-21 | โฑ๏ธ Read time: 71 min read

Comparing metrics across datasets and models

#DataScience #AI #Python
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๐Ÿš€ Master Data Science & Programming!

Unlock your potential with this curated list of Telegram channels. Whether you need books, datasets, interview prep, or project ideas, we have the perfect resource for you. Join the community today!


๐Ÿ”ฐ Machine Learning with Python
Learn Machine Learning with hands-on Python tutorials, real-world code examples, and clear explanations for researchers and developers.
https://t.me/CodeProgrammer

๐Ÿ”– Machine Learning
Machine learning insights, practical tutorials, and clear explanations for beginners and aspiring data scientists. Follow the channel for models, algorithms, coding guides, and real-world ML applications.
https://t.me/DataScienceM

๐Ÿง  Code With Python
This channel delivers clear, practical content for developers, covering Python, Django, Data Structures, Algorithms, and DSA โ€“ perfect for learning, coding, and mastering key programming skills.
https://t.me/DataScience4

๐ŸŽฏ PyData Careers | Quiz
Python Data Science jobs, interview tips, and career insights for aspiring professionals.
https://t.me/DataScienceQ

๐Ÿ’พ Kaggle Data Hub
Your go-to hub for Kaggle datasets โ€“ explore, analyze, and leverage data for Machine Learning and Data Science projects.
https://t.me/datasets1

๐Ÿง‘โ€๐ŸŽ“ Udemy Coupons | Courses
The first channel in Telegram that offers free Udemy coupons
https://t.me/DataScienceC

๐Ÿ˜€ ML Research Hub
Advancing research in Machine Learning โ€“ practical insights, tools, and techniques for researchers.
https://t.me/DataScienceT

๐Ÿ’ฌ Data Science Chat
An active community group for discussing data challenges and networking with peers.
https://t.me/DataScience9

๐Ÿ Python Arab| ุจุงูŠุซูˆู† ุนุฑุจูŠ
The largest Arabic-speaking group for Python developers to share knowledge and help.
https://t.me/PythonArab

๐Ÿ–Š Data Science Jupyter Notebooks
Explore the world of Data Science through Jupyter Notebooksโ€”insights, tutorials, and tools to boost your data journey. Code, analyze, and visualize smarter with every post.
https://t.me/DataScienceN

๐Ÿ“บ Free Online Courses | Videos
Free online courses covering data science, machine learning, analytics, programming, and essential skills for learners.
https://t.me/DataScienceV

๐Ÿ“ˆ Data Analytics
Dive into the world of Data Analytics โ€“ uncover insights, explore trends, and master data-driven decision making.
https://t.me/DataAnalyticsX

๐ŸŽง Learn Python Hub
Master Python with step-by-step courses โ€“ from basics to advanced projects and practical applications.
https://t.me/Python53

โญ๏ธ Research Papers
Professional Academic Writing & Simulation Services
https://t.me/DataScienceY

โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”
Admin: @HusseinSheikho
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๐Ÿ“Œ The Geometry of Laziness: What Angles Reveal About AI Hallucinations

๐Ÿ—‚ Category: LARGE LANGUAGE MODELS

๐Ÿ•’ Date: 2025-12-22 | โฑ๏ธ Read time: 12 min read

A story about failing forward, spheres you canโ€™t visualize, and why sometimes the math knowsโ€ฆ

#DataScience #AI #Python
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๐Ÿ“Œ Understanding Vibe Proving

๐Ÿ—‚ Category: LARGE LANGUAGE MODELS

๐Ÿ•’ Date: 2025-12-22 | โฑ๏ธ Read time: 18 min read

How to make LLMs reason with verifiable, step-by-step logic (Part 1)

#DataScience #AI #Python
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๐Ÿ“Œ The Machine Learning โ€œAdvent Calendarโ€ Day 22: Embeddings in Excel

๐Ÿ—‚ Category: MACHINE LEARNING

๐Ÿ•’ Date: 2025-12-22 | โฑ๏ธ Read time: 8 min read

Understanding text embeddings through simple models and Excel

#DataScience #AI #Python