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Канал Data Science & Machine Learning (@datascienceinterviews) языкового сегмента Английский является активным участником. Сейчас сообщество объединяет 27 585 подписчиков, занимая 7 061 место в категории Образование и 14 322 место в регионе Индия.
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С момента создания невідомо проект демонстрирует стремительный рост, собрав аудиторию из 27 585 подписчиков.
Согласно последним данным от 30 октября, 2026, канал показывает стабильную активность. За последние 30 дней изменение числа участников составило -69, а за последние 24 часа — 4, при этом общий охват остаётся высоким.
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“The first channel on Telegram that offers exciting questions, answers, and tests in data science, artificial intelligence, machine learning, and programming languages.
For promotions: @love_data”
Благодаря высокой частоте обновлений (последние данные получены 31 октября, 2026) канал поддерживает актуальность и высокий уровень охвата публикаций. Аналитика показывает, что аудитория активно взаимодействует с контентом, что делает его важной точкой влияния в категории Образование.
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🌳 What is a Decision Tree? 🌳
Imagine you're trying to figure out what to eat for dinner. 🍕🥗🍔 A decision tree is like a flowchart that helps you make choices based on yes/no questions:
Are you in the mood for something light?
Yes ➡️ Salad 🥗
No ➡️ Are you craving something cheesy?
Yes ➡️ Pizza 🍕
No ➡️ Burger 🍔
That's the essence of how decision trees work in machine learning!
🤖 In Machine Learning Terms:
Nodes: Questions (e.g., Is the price > $50?)
Branches: Possible answers (e.g., Yes/No)
Leaves: Final decisions or predictions (e.g., "Expensive" or "Affordable")
📊 They're used for tasks like:
✅ Classifying emails as spam or not.
✅ Predicting if a customer will buy a product.
✅ Diagnosing diseases in healthcare.
🎯 Why are they Awesome?
Simple to understand (even for non-techies).
Visual and interpretable (you can see the logic behind predictions).
Great for small-to-medium datasets.
⚡️ Limitations:
They can "overfit" (become too specific).
Not the best for very large datasets or complex problems.
🛠 Pro Tip:
To handle overfitting, use Random Forests 🌲🌲 or Gradient Boosted Trees 🚀—advanced versions of decision trees.
𝗙𝗿𝗲𝗲 𝗩𝗶𝗿𝘁𝘂𝗮𝗹 𝗜𝗻𝘁𝗲𝗿𝗻𝘀𝗵𝗶𝗽 𝗖𝗲𝗿𝘁𝗶𝗳𝗶𝗰𝗮𝘁𝗶𝗼𝗻𝘀 𝗕𝘆 𝗧𝗼𝗽 𝗖𝗼𝗺𝗽𝗮𝗻𝗶𝗲𝘀😍
- JP Morgan
- Accenture
- Walmart
- Tata Group
- Accenture
𝗟𝗶𝗻𝗸 👇:-
https://pdlink.in/3WTGGI8
Enroll For FREE & Get Certified🎓
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How to enter into Data Science
👉Start with the basics: Learn programming languages like Python and R to master data analysis and machine learning techniques. Familiarize yourself with tools such as TensorFlow, sci-kit-learn, and Tableau to build a strong foundation.
👉Choose your target field: From healthcare to finance, marketing, and more, data scientists play a pivotal role in extracting valuable insights from data. You should choose which field you want to become a data scientist in and start learning more about it.
👉Build a portfolio: Start building small projects and add them to your portfolio. This will help you build credibility and showcase your skills.
𝗬𝗼𝘂𝗿 𝗨𝗹𝘁𝗶𝗺𝗮𝘁𝗲 𝗥𝗼𝗮𝗱𝗺𝗮𝗽 𝘁𝗼 𝗕𝗲𝗰𝗼𝗺𝗲 𝗮 𝗗𝗮𝘁𝗮 𝗔𝗻𝗮𝗹𝘆𝘀𝘁!😍
Want to break into Data Analytics but don’t know where to start?
Follow this step-by-step roadmap to build real-world skills! ✅
𝐋𝐢𝐧𝐤👇:-
https://pdlink.in/3CHqZg7
🎯 Start today & build a strong career in Data Analytics! 🚀
1. How can we deal with problems that arise when the data flows in from a variety of sources?
There are many ways to go about dealing with multi-source problems. However, these are done primarily to solve the problems of:
Identifying the presence of similar/same records and merging them into a single recordRe-structuring the schema to ensure there is good schema integration
2. Where is Time Series Analysis used?
Since time series analysis (TSA) has a wide scope of usage, it can be used in multiple domains. Here are some of the places where TSA plays an important role:
Statistics
Signal processing
Econometrics
Weather forecasting
Earthquake prediction
Astronomy
Applied science
3. What are the ideal situations in which t-test or z-test can be used?
It is a standard practice that a t-test is used when there is a sample size less than 30 and the z-test is considered when the sample size exceeds 30 in most cases.
4. What is the usage of the NVL() function?
The NVL() function is used to convert the NULL value to the other value. The function returns the value of the second parameter if the first parameter is NULL. If the first parameter is anything other than NULL, it is left unchanged. This function is used in Oracle, not in SQL and MySQL. Instead of NVL() function, MySQL have IFNULL() and SQL Server have ISNULL() function.
5. What is the difference between DROP and TRUNCATE commands?
If a table is dropped, all things associated with that table are dropped as well. This includes the relationships defined on the table with other tables, access privileges, and grants that the table has, as well as the integrity checks and constraints.
However, if a table is truncated, there are no such problems as mentioned above. The table retains its original structure and the data is dropped.
𝗠𝗮𝘀𝘁𝗲𝗿 𝗗𝗮𝘁𝗮 𝗔𝗻𝗮𝗹𝘆𝘁𝗶𝗰𝘀 𝗜𝗻 𝟮𝟬𝟮𝟱😍
Master industry-standard tools like Excel, SQL, Tableau, and more.
Gain hands-on experience through real-world projects designed to mimic professional challenges
𝗟𝗶𝗻𝗸👇 :-
https://pdlink.in/4jxUW2K
All The Best 🎉
𝗗𝗮𝘁𝗮 𝗦𝗰𝗶𝗲𝗻𝗰𝗲 𝗜𝗻𝘁𝗲𝗿𝘃𝗶𝗲𝘄 𝗤𝘂𝗲𝘀𝘁𝗶𝗼𝗻:
How does outliers impact kNN?
Outliers can significantly impact the performance of kNN, leading to inaccurate predictions due to the model's reliance on proximity for decision-making. Here’s a breakdown of how outliers influence kNN:
𝗛𝗶𝗴𝗵 𝗩𝗮𝗿𝗶𝗮𝗻𝗰𝗲
The presence of outliers can increase the model's variance, as predictions near outliers may fluctuate unpredictably depending on which neighbors are included. This makes the model less reliable for regression tasks with scattered or sparse data.
𝗗𝗶𝘀𝘁𝗮𝗻𝗰𝗲 𝗠𝗲𝘁𝗿𝗶𝗰 𝗦𝗲𝗻𝘀𝗶𝘁𝗶𝘃𝗶𝘁𝘆
kNN relies on distance metrics, which can be significantly affected by outliers. In high-dimensional spaces, outliers can increase the range of distances, making it harder for the algorithm to distinguish between nearby points and those farther away. This issue can lead to an overall reduction in accuracy as the model’s ability to effectively measure "closeness" degrades.
𝗥𝗲𝗱𝘂𝗰𝗲 𝗽𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲 𝗶𝗻 𝗖𝗹𝗮𝘀𝘀𝗶𝗳𝗶𝗰𝗮𝘁𝗶𝗼𝗻/𝗥𝗲𝗴𝗿𝗲𝘀𝘀𝗶𝗼𝗻 𝗧𝗮𝘀𝗸𝘀
Outliers near class boundaries can pull the decision boundary toward them, potentially misclassifying nearby points that should belong to a different class. This is particularly problematic if k is small, as individual points (like outliers) have a greater influence. The same happens in regression tasks as well.
𝗙𝗲𝗮𝘁𝘂𝗿𝗲 𝗜𝗻𝗳𝗹𝘂𝗲𝗻𝗰𝗲 𝗗𝗶𝘀𝗽𝗿𝗼𝗽𝗼𝗿𝘁𝗶𝗼𝗻
If certain features contain outliers, they can dominate the distance calculations and overshadow the impact of other features. For example, an outlier in a high-magnitude feature may cause distances to be determined largely by that feature, affecting the quality of the neighbor selection.
Cracking the Data Science Interview
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t.me/datasciencefun
ENJOY LEARNING 👍👍
𝗠𝗮𝘀𝘁𝗲𝗿 𝗧𝗼𝗽 𝗧𝗲𝗰𝗵 𝗦𝗸𝗶𝗹𝗹𝘀 𝗳𝗼𝗿 𝗙𝗥𝗘𝗘😍
Best Free Platforms to Learn Top Technologies
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Learning Python FREE BOOK
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https://cfm.ehu.es/ricardo/docs/python/Learning_Python.pdf
Python course by Google
https://developers.google.com/edu/python
No registration or download needed.
👨💻Websites to Practice Python
Python Basics 👇:
1. http://codingbat.com/python
2. https://www.hackerrank.com/
3. https://www.hackerearth.com/practice/
Practice Problems set :
4. https://projecteuler.net/archives
5. http://www.codeabbey.com/index/task_list
6. http://www.pythonchallenge.com/
𝗦𝗤𝗟 𝗙𝗥𝗘𝗘 𝗖𝗲𝗿𝘁𝗶𝗳𝗶𝗰𝗮𝘁𝗶𝗼𝗻 𝗖𝗼𝘂𝗿𝘀𝗲𝘀 😍
Best Free SQL Courses to Get Started
1) Introduction to Databases and SQL
2) Advanced Database and SQL
3) Learn SQL
4) SQL Tutorial
𝐋𝐢𝐧𝐤 👇:-
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©How fresher can get a job as a data scientist?©
Job market is highly resistant to hire data scientist as a fresher. Everyone out there asks for at least 2 years of experience, but then the question is where will we get the two years experience from?
The important thing here to build a portfolio. As you are a fresher I would assume you had learnt data science through online courses. They only teach you the basics, the analytical skills required to clean the data and apply machine learning algorithms to them comes only from practice.
Do some real-world data science projects, participate in Kaggle competition. kaggle provides data sets for practice as well. Whatever projects you do, create a GitHub repository for it. Place all your projects there so when a recruiter is looking at your profile they know you have hands-on practice and do know the basics. This will take you a long way.
All the major data science jobs for freshers will only be available through off-campus interviews.
Some companies that hires data scientists are:
Siemens
Accenture
IBM
Cerner
Creating a technical portfolio will showcase the knowledge you have already gained and that is essential while you got out there as a fresher and try to find a data scientist job.
𝗧𝗼𝗽 𝗙𝗿𝗲𝗲 𝗣𝘆𝘁𝗵𝗼𝗻 𝗖𝗼𝘂𝗿𝘀𝗲𝘀 𝗳𝗼𝗿 𝗕𝗲𝗴𝗶𝗻𝗻𝗲𝗿𝘀😍
Python is one of the most versatile and in-demand programming languages today.
Whether you’re a beginner or looking to refresh your coding skills, these beginner-friendly courses will guide you step by step.
𝗟𝗲𝗮𝗿𝗻 𝗙𝗼𝗿 𝗙𝗥𝗘𝗘👇:-
https://pdlink.in/4gG4k2q
All The Best 🎉
AI is the next biggest skill to learn.
AI experts are earing up to $200000+ per year.
Here are 4 FREE courses from Google and Microsoft that most people don't know:
https://microsoft.github.io/AI-For-Beginners/?
https://www.cloudskillsboost.google/paths/118
https://www.deeplearning.ai/courses/ai-for-everyone/
https://www.deeplearning.ai/short-courses/chatgpt-prompt-engineering-for-developers/
More free resources: https://t.me/udacityfreecourse
𝗙𝗥𝗘𝗘 𝗧𝗲𝗰𝗵 𝗖𝗼𝘂𝗿𝘀𝗲𝘀 𝗧𝗼 𝗜𝗺𝗽𝗿𝗼𝘃𝗲 𝗬𝗼𝘂𝗿 𝗦𝗸𝗶𝗹𝗹𝘀𝗲𝘁 😍
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𝐋𝐢𝐧𝐤 👇:-
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