Coding Interview Resources – Telegram
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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Lol 😂
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TIME COMPLEXITY OF SORTING ALGORITHM
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JavaScript Array Slice ()
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Detailed Roadmap to Become a Programmer

📂 Learn Programming Fundamentals
Start with basics like programming logic, syntax, and how code flows. This builds your foundation.

📂 Choose a Language
Pick one popular language like Python (easy & versatile), Java (widely used in big systems), or C++ (great for performance). Focus on mastering it first.

📂 Learn Data Structures & Algorithms
Understand arrays, lists, trees, sorting, searching — these help write efficient code and solve complex problems.

📂 Learn Problem Solving
Practice coding challenges on platforms like LeetCode or HackerRank to improve your logic and speed.

📂 Learn OOPs & Design Patterns
Object-Oriented Programming (OOP) teaches how to structure code; design patterns show reusable solutions to common problems.

📂 Learn Version Control (Git & GitHub)
Essential for collaboration—track your code changes and work with others safely using Git and GitHub.

📂 Learn Debugging & Testing
Find and fix bugs; test your code to make sure it works as expected.

📂 Work on Real-World Projects
Build practical projects to apply what you learned and showcase skills to employers.

📂 Contribute to Open Source
Collaborate on existing projects—gain experience, community recognition, and improve your coding.

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With skills and projects ready, start applying confidently for programming roles or internships to kick-start your career.

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Data Analytics Pattern Identification....;;

Trend Analysis: Examining data over time to identify upward or downward trends.

Seasonal Patterns: Identifying recurring patterns or trends based on seasons or specific time periods

Correlation: Understanding relationships between variables and how changes in one may affect another.

Outlier Detection: Identifying data points that deviate significantly from the overall pattern.

Clustering: Grouping similar data points together to find natural patterns within the data.

Classification: Categorizing data into predefined classes or groups based on certain features.

Regression Analysis: Predicting a dependent variable based on the values of independent variables.

Frequency Distribution: Analyzing the distribution of values within a dataset.

Pattern Recognition: Identifying recurring structures or shapes within the data.

Text Analysis: Extracting insights from unstructured text data through techniques like sentiment analysis or topic modeling.

These patterns help organizations make informed decisions, optimize processes, and gain a deeper understanding of their data.
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Data Structures Cheatsheet 👆
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If-else in Python 👆
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HTTP status codes — quick cheat sheet

200 OK: request succeeded
🆕 201 Created: new resource saved
📝 204 No Content: success, nothing to return
🔀 301 Moved Permanently: use new URL
↪️ 302 Found: temporary redirect
🧾 304 Not Modified: use cached version

🙅 400 Bad Request: invalid input
🪪 401 Unauthorized: missing/invalid auth
🚫 403 Forbidden: authenticated but not allowed
404 Not Found: resource doesn’t exist
408 Request Timeout: client took too long
🧯 409 Conflict: state/version clash

💥 500 Internal Server Error: server crashed
🛠️ 502 Bad Gateway: upstream failed
🕸️ 503 Service Unavailable: overloaded/maintenance
504 Gateway Timeout: upstream too slow

tips
• return precise codes; don’t default to 200/500
• include a machine-readable error body (code, message, details)
• never leak stack traces in production
• pair 304 with ETag/If-None-Match for caching
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Don't overwhelm to learn Git,🙌

Git is only this much👇😇


1.Core:
• git init
• git clone
• git add
• git commit
• git status
• git diff
• git checkout
• git reset
• git log
• git show
• git tag
• git push
• git pull

2.Branching:
• git branch
• git checkout -b
• git merge
• git rebase
• git branch --set-upstream-to
• git branch --unset-upstream
• git cherry-pick

3.Merging:
• git merge
• git rebase

4.Stashing:
• git stash
• git stash pop
• git stash list
• git stash apply
• git stash drop

5.Remotes:
• git remote
• git remote add
• git remote remove
• git fetch
• git pull
• git push
• git clone --mirror

6.Configuration:
• git config
• git global config
• git reset config

7. Plumbing:
• git cat-file
• git checkout-index
• git commit-tree
• git diff-tree
• git for-each-ref
• git hash-object
• git ls-files
• git ls-remote
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8.Porcelain:
• git blame
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• git checkout
• git commit
• git diff
• git fetch
• git grep
• git log
• git merge
• git push
• git rebase
• git reset
• git show
• git tag

9.Alias:
• git config --global alias.<alias> <command>

10.Hook:
• git config --local core.hooksPath <path>

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Here are some essential data science concepts from A to Z:

A - Algorithm: A set of rules or instructions used to solve a problem or perform a task in data science.

B - Big Data: Large and complex datasets that cannot be easily processed using traditional data processing applications.

C - Clustering: A technique used to group similar data points together based on certain characteristics.

D - Data Cleaning: The process of identifying and correcting errors or inconsistencies in a dataset.

E - Exploratory Data Analysis (EDA): The process of analyzing and visualizing data to understand its underlying patterns and relationships.

F - Feature Engineering: The process of creating new features or variables from existing data to improve model performance.

G - Gradient Descent: An optimization algorithm used to minimize the error of a model by adjusting its parameters.

H - Hypothesis Testing: A statistical technique used to test the validity of a hypothesis or claim based on sample data.

I - Imputation: The process of filling in missing values in a dataset using statistical methods.

J - Joint Probability: The probability of two or more events occurring together.

K - K-Means Clustering: A popular clustering algorithm that partitions data into K clusters based on similarity.

L - Linear Regression: A statistical method used to model the relationship between a dependent variable and one or more independent variables.

M - Machine Learning: A subset of artificial intelligence that uses algorithms to learn patterns and make predictions from data.

N - Normal Distribution: A symmetrical bell-shaped distribution that is commonly used in statistical analysis.

O - Outlier Detection: The process of identifying and removing data points that are significantly different from the rest of the dataset.

P - Precision and Recall: Evaluation metrics used to assess the performance of classification models.

Q - Quantitative Analysis: The process of analyzing numerical data to draw conclusions and make decisions.

R - Random Forest: An ensemble learning algorithm that builds multiple decision trees to improve prediction accuracy.

S - Support Vector Machine (SVM): A supervised learning algorithm used for classification and regression tasks.

T - Time Series Analysis: A statistical technique used to analyze and forecast time-dependent data.

U - Unsupervised Learning: A type of machine learning where the model learns patterns and relationships in data without labeled outputs.

V - Validation Set: A subset of data used to evaluate the performance of a model during training.

W - Web Scraping: The process of extracting data from websites for analysis and visualization.

X - XGBoost: An optimized gradient boosting algorithm that is widely used in machine learning competitions.

Y - Yield Curve Analysis: The study of the relationship between interest rates and the maturity of fixed-income securities.

Z - Z-Score: A standardized score that represents the number of standard deviations a data point is from the mean.

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