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Forwarded from Python for Data Analysts
๐Ÿฒ ๐—™๐—ฟ๐—ฒ๐—ฒ ๐—–๐—ผ๐˜‚๐—ฟ๐˜€๐—ฒ๐˜€ ๐˜๐—ผ ๐—Ÿ๐—ฒ๐—ฎ๐—ฟ๐—ป ๐˜๐—ต๐—ฒ ๐— ๐—ผ๐˜€๐˜ ๐—œ๐—ป-๐——๐—ฒ๐—บ๐—ฎ๐—ป๐—ฑ ๐—ง๐—ฒ๐—ฐ๐—ต ๐—ฆ๐—ธ๐—ถ๐—น๐—น๐˜€๐Ÿ˜

๐Ÿš€ Want to future-proof your career without spending a single rupee?๐Ÿ’ต

These 6 free online courses from top institutions like Google, Harvard, IBM, Stanford, and Cisco will help you master high-demand tech skills in 2025 โ€” from Data Analytics to Machine Learning๐Ÿ“Š๐Ÿง‘โ€๐Ÿ’ป

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Top 5 data analysis interview questions with answers ๐Ÿ˜„๐Ÿ‘‡

Question 1: How would you approach a new data analysis project?

Ideal answer:
I would approach a new data analysis project by following these steps:
Understand the business goals. What is the purpose of the data analysis? What questions are we trying to answer?
Gather the data. This may involve collecting data from different sources, such as databases, spreadsheets, and surveys.
Clean and prepare the data. This may involve removing duplicate data, correcting errors, and formatting the data in a consistent way.
Explore the data. This involves using data visualization and statistical analysis to understand the data and identify any patterns or trends.
Build a model or hypothesis. This involves using the data to develop a model or hypothesis that can be used to answer the business questions.
Test the model or hypothesis. This involves using the data to test the model or hypothesis and see how well it performs.
Interpret and communicate the results. This involves explaining the results of the data analysis to stakeholders in a clear and concise way.

Question 2: What are some of the challenges you have faced in previous data analysis projects, and how did you overcome them?

Ideal answer:
One of the biggest challenges I have faced in previous data analysis projects is dealing with missing data. I have overcome this challenge by using a variety of techniques, such as imputation and machine learning.
Another challenge I have faced is dealing with large datasets. I have overcome this challenge by using efficient data processing techniques and by using cloud computing platforms.

Question 3: Can you describe a time when you used data analysis to solve a business problem?

Ideal answer:
In my previous role at a retail company, I was tasked with identifying the products that were most likely to be purchased together. I used data analysis to identify patterns in the purchase data and to develop a model that could predict which products were most likely to be purchased together. This model was used to improve the company's product recommendations and to increase sales.

Question 4: What are some of your favorite data analysis tools and techniques?

Ideal answer:
Some of my favorite data analysis tools and techniques include:
Programming languages such as Python and R
Data visualization tools such as Tableau and Power BI
Statistical analysis tools such as SPSS and SAS
Machine learning algorithms such as linear regression and decision trees

Question 5: How do you stay up-to-date on the latest trends and developments in data analysis?

Ideal answer:
I stay up-to-date on the latest trends and developments in data analysis by reading industry publications, attending conferences, and taking online courses. I also follow thought leaders on social media and subscribe to newsletters.

By providing thoughtful and well-informed answers to these questions, you can demonstrate to your interviewer that you have the analytical skills and knowledge necessary to be successful in the role.

Like this post if you want more interview questions with detailed answers to be posted in the channel ๐Ÿ‘โค๏ธ

Share with credits: https://t.me/sqlspecialist

Hope it helps :)
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๐Ÿš€๐—ง๐—ผ๐—ฝ ๐Ÿฏ ๐—™๐—ฟ๐—ฒ๐—ฒ ๐—š๐—ผ๐—ผ๐—ด๐—น๐—ฒ-๐—–๐—ฒ๐—ฟ๐˜๐—ถ๐—ณ๐—ถ๐—ฒ๐—ฑ ๐—ฃ๐˜†๐˜๐—ต๐—ผ๐—ป ๐—–๐—ผ๐˜‚๐—ฟ๐˜€๐—ฒ๐˜€ ๐Ÿฎ๐Ÿฌ๐Ÿฎ๐Ÿฑ๐Ÿ˜

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๐Ÿ“ข Weโ€™re Hiring: Senior Data Scientist (SDS) | 2.5โ€“3.5 Years of Experience
Weโ€™re looking for high-caliber Senior Data Scientists to join our team at Sigmoid Analytics โ€” individuals with a passion for solving real-world business problems using scalable machine learning solutions.
If you thrive in a high-performance environment and have experience building data products end-to-end, we want to hear from you!

โœ… What Weโ€™re Looking For:
2.5โ€“3.5 years of hands-on experience in data science & machine learning
Proficient in Python and ML libraries
Experience in building and deploying ML models in production
Excellent communication skills & business understanding

๐ŸŽ“ From Tier-1 / Tier-2 Engineering Colleges only

๐Ÿ“ Location: Whitefield, Bangalore
๐Ÿšซ Note: Candidates who interviewed with Sigmoid in the last 6 months are not eligible.

๐Ÿ“ฌ To Apply:
Email your CV and the following details to anu.s@sigmoidanalytics.com
Years of experience
Current CTC
Expected CTC
Notice period
โค4๐Ÿ‘Ž1
Forwarded from Python for Data Analysts
๐—ง๐—ต๐—ฒ ๐—•๐—ฒ๐˜€๐˜ ๐—™๐—ฟ๐—ฒ๐—ฒ ๐Ÿฏ๐Ÿฌ-๐——๐—ฎ๐˜† ๐—ฅ๐—ผ๐—ฎ๐—ฑ๐—บ๐—ฎ๐—ฝ ๐˜๐—ผ ๐—ฆ๐˜๐—ฎ๐—ฟ๐˜ ๐—ฌ๐—ผ๐˜‚๐—ฟ ๐——๐—ฎ๐˜๐—ฎ ๐—ฆ๐—ฐ๐—ถ๐—ฒ๐—ป๐—ฐ๐—ฒ ๐—๐—ผ๐˜‚๐—ฟ๐—ป๐—ฒ๐˜†๐Ÿ˜

๐Ÿ“Š If I had to restart my Data Science journey in 2025, this is where Iโ€™d beginโœจ๏ธ

Meet 30 Days of Data Science โ€” a free and beginner-friendly GitHub repository that guides you through the core fundamentals of data science in just one month๐Ÿง‘โ€๐ŸŽ“๐Ÿ“Œ

๐‹๐ข๐ง๐ค๐Ÿ‘‡:-

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Simply bookmark the page, pick Day 1, and begin your journeyโœ…๏ธ
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Forwarded from Python for Data Analysts
๐Ÿณ ๐— ๐˜‚๐˜€๐˜-๐—ž๐—ป๐—ผ๐˜„ ๐—ฆ๐—ค๐—Ÿ ๐—–๐—ผ๐—ป๐—ฐ๐—ฒ๐—ฝ๐˜๐˜€ ๐—˜๐˜ƒ๐—ฒ๐—ฟ๐˜† ๐—”๐˜€๐—ฝ๐—ถ๐—ฟ๐—ถ๐—ป๐—ด ๐——๐—ฎ๐˜๐—ฎ ๐—”๐—ป๐—ฎ๐—น๐˜†๐˜€๐˜ ๐—ฆ๐—ต๐—ผ๐˜‚๐—น๐—ฑ ๐— ๐—ฎ๐˜€๐˜๐—ฒ๐—ฟ๐Ÿ˜

If youโ€™re serious about becoming a data analyst, thereโ€™s no skipping SQL. Itโ€™s not just another technical skill โ€” itโ€™s the core language for data analytics.๐Ÿ“Š

๐‹๐ข๐ง๐ค๐Ÿ‘‡:-

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This guide covers 7 key SQL concepts that every beginner must learnโœ…๏ธ
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Some essential concepts every data scientist should understand:

### 1. Statistics and Probability
- Purpose: Understanding data distributions and making inferences.
- Core Concepts: Descriptive statistics (mean, median, mode), inferential statistics, probability distributions (normal, binomial), hypothesis testing, p-values, confidence intervals.

### 2. Programming Languages
- Purpose: Implementing data analysis and machine learning algorithms.
- Popular Languages: Python, R.
- Libraries: NumPy, Pandas, Scikit-learn (Python), dplyr, ggplot2 (R).

### 3. Data Wrangling
- Purpose: Cleaning and transforming raw data into a usable format.
- Techniques: Handling missing values, data normalization, feature engineering, data aggregation.

### 4. Exploratory Data Analysis (EDA)
- Purpose: Summarizing the main characteristics of a dataset, often using visual methods.
- Tools: Matplotlib, Seaborn (Python), ggplot2 (R).
- Techniques: Histograms, scatter plots, box plots, correlation matrices.

### 5. Machine Learning
- Purpose: Building models to make predictions or find patterns in data.
- Core Concepts: Supervised learning (regression, classification), unsupervised learning (clustering, dimensionality reduction), model evaluation (accuracy, precision, recall, F1 score).
- Algorithms: Linear regression, logistic regression, decision trees, random forests, support vector machines, k-means clustering, principal component analysis (PCA).

### 6. Deep Learning
- Purpose: Advanced machine learning techniques using neural networks.
- Core Concepts: Neural networks, backpropagation, activation functions, overfitting, dropout.
- Frameworks: TensorFlow, Keras, PyTorch.

### 7. Natural Language Processing (NLP)
- Purpose: Analyzing and modeling textual data.
- Core Concepts: Tokenization, stemming, lemmatization, TF-IDF, word embeddings.
- Techniques: Sentiment analysis, topic modeling, named entity recognition (NER).

### 8. Data Visualization
- Purpose: Communicating insights through graphical representations.
- Tools: Matplotlib, Seaborn, Plotly (Python), ggplot2, Shiny (R), Tableau.
- Techniques: Bar charts, line graphs, heatmaps, interactive dashboards.

### 9. Big Data Technologies
- Purpose: Handling and analyzing large volumes of data.
- Technologies: Hadoop, Spark.
- Core Concepts: Distributed computing, MapReduce, parallel processing.

### 10. Databases
- Purpose: Storing and retrieving data efficiently.
- Types: SQL databases (MySQL, PostgreSQL), NoSQL databases (MongoDB, Cassandra).
- Core Concepts: Querying, indexing, normalization, transactions.

### 11. Time Series Analysis
- Purpose: Analyzing data points collected or recorded at specific time intervals.
- Core Concepts: Trend analysis, seasonal decomposition, ARIMA models, exponential smoothing.

### 12. Model Deployment and Productionization
- Purpose: Integrating machine learning models into production environments.
- Techniques: API development, containerization (Docker), model serving (Flask, FastAPI).
- Tools: MLflow, TensorFlow Serving, Kubernetes.

### 13. Data Ethics and Privacy
- Purpose: Ensuring ethical use and privacy of data.
- Core Concepts: Bias in data, ethical considerations, data anonymization, GDPR compliance.

### 14. Business Acumen
- Purpose: Aligning data science projects with business goals.
- Core Concepts: Understanding key performance indicators (KPIs), domain knowledge, stakeholder communication.

### 15. Collaboration and Version Control
- Purpose: Managing code changes and collaborative work.
- Tools: Git, GitHub, GitLab.
- Practices: Version control, code reviews, collaborative development.

Best Data Science & Machine Learning Resources: https://topmate.io/coding/914624

ENJOY LEARNING ๐Ÿ‘๐Ÿ‘
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๐—™๐—ฟ๐—ฒ๐—ฒ ๐— ๐—ถ๐—ฐ๐—ฟ๐—ผ๐˜€๐—ผ๐—ณ๐˜ & ๐—Ÿ๐—ถ๐—ป๐—ธ๐—ฒ๐—ฑ๐—œ๐—ป ๐—”๐—œ ๐—–๐—ฒ๐—ฟ๐˜๐—ถ๐—ณ๐—ถ๐—ฐ๐—ฎ๐˜๐—ถ๐—ผ๐—ป ๐˜๐—ผ ๐—Ÿ๐—ฎ๐—ป๐—ฑ ๐—ง๐—ผ๐—ฝ ๐—๐—ผ๐—ฏ๐˜€ ๐—ถ๐—ป ๐Ÿฎ๐Ÿฌ๐Ÿฎ๐Ÿฑ๐Ÿ˜

๐ŸŽฏ Want to Land High-Paying AI Jobs in 2025?

Start your journey with this FREE Generative AI course offered by Microsoft and LinkedIn๐Ÿง‘โ€๐ŸŽ“โœจ๏ธ

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Struggling with Machine Learning algorithms? ๐Ÿค–

Then you better stay with me! ๐Ÿค“

We are going back to the basics to simplify ML algorithms.
... today's turn is Logistic Regression! ๐Ÿ‘‡๐Ÿป

1๏ธโƒฃ ๐—Ÿ๐—ข๐—š๐—œ๐—ฆ๐—ง๐—œ๐—– ๐—ฅ๐—˜๐—š๐—ฅ๐—˜๐—ฆ๐—ฆ๐—œ๐—ข๐—ก
It is a binary classification model used to classify our input data into two main categories.

It can be extended to multiple classifications... but today we'll focus on a binary one.

Also known as Simple Logistic Regression.

2๏ธโƒฃ ๐—›๐—ข๐—ช ๐—ง๐—ข ๐—–๐—ข๐— ๐—ฃ๐—จ๐—ง๐—˜ ๐—œ๐—ง?
The Sigmoid Function is our mathematical wand, turning numbers into neat probabilities between 0 and 1.

It's what makes Logistic Regression tick, giving us a clear 'probabilistic' picture.

3๏ธโƒฃ ๐—›๐—ข๐—ช ๐—ง๐—ข ๐——๐—˜๐—™๐—œ๐—ก๐—˜ ๐—ง๐—›๐—˜ ๐—•๐—˜๐—ฆ๐—ง ๐—™๐—œ๐—ง?
For every parametric ML algorithm, we need a LOSS FUNCTION.

It is our map to find our optimal solution or global minimum.

(hoping there is one! ๐Ÿ˜‰)

โœš ๐—•๐—ข๐—ก๐—จ๐—ฆ - FROM LINEAR TO LOGISTIC REGRESSION
To obtain the sigmoid function, we can derive it from the Linear Regression equation.
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American Express is hiring Analyst ๐Ÿš€

Min. Experience : 1 Year
Location : Gurugram

Apply link : https://aexp.eightfold.ai/careers/job/30504056?hl=en&utm_source=linkedin&domain=aexp.com

๐Ÿ‘‰WhatsApp Channel: https://whatsapp.com/channel/0029Vaxjq5a4dTnKNrdeiZ0J

๐Ÿ‘‰Telegram Link: https://t.me/addlist/4q2PYC0pH_VjZDk5

All the best ๐Ÿ‘๐Ÿ‘
๐Ÿ‘1
Gartner is hiring Associate Data Scientist ๐Ÿš€

Experience : 0-3 Years
Location : Gurugram

Apply link : https://gartner.wd5.myworkdayjobs.com/EXT/job/Gurgaon/Associate-Data-Scientist_101739-1/apply?source=JB-10120

๐Ÿ‘‰WhatsApp Channel: https://whatsapp.com/channel/0029Vaxjq5a4dTnKNrdeiZ0J

๐Ÿ‘‰Telegram Link: https://t.me/addlist/4q2PYC0pH_VjZDk5

All the best ๐Ÿ‘๐Ÿ‘
๐Ÿ‘1
Dell Technologies is hiring!
Position: Data Scientist
Qualifications: Bachelorโ€™s/ Master's Degree/ PhD
Salary: 7 - 19 LPA (Expected)
Experience: Freshers/ Experienced
Location: Bangalore/ Hyderabad
๏ปฟ
๐Ÿ“ŒApply Now: https://jobs.dell.com/en/job/bengaluru/data-scientist/375/84532530736

๐Ÿ‘‰ WhatsApp Channel: https://whatsapp.com/channel/0029VaI5CV93AzNUiZ5Tt226

๐Ÿ‘‰ Telegram Channel: https://t.me/addlist/4q2PYC0pH_VjZDk5

All the best! ๐Ÿ‘๐Ÿ‘
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๐Ÿฒ ๐—™๐—ฟ๐—ฒ๐—ฒ ๐—™๐˜‚๐—น๐—น ๐—ง๐—ฒ๐—ฐ๐—ต ๐—–๐—ผ๐˜‚๐—ฟ๐˜€๐—ฒ๐˜€ ๐—ฌ๐—ผ๐˜‚ ๐—–๐—ฎ๐—ป ๐—ช๐—ฎ๐˜๐—ฐ๐—ต ๐—ฅ๐—ถ๐—ด๐—ต๐˜ ๐—ก๐—ผ๐˜„๐Ÿ˜

Ready to level up your tech game without spending a rupee? These 6 full-length courses are beginner-friendly, 100% free, and packed with practical knowledge๐Ÿ“š๐Ÿง‘โ€๐ŸŽ“

Whether you want to code in Python, hack ethically, or build your first Android app โ€” these videos are your shortcut to real tech skills๐Ÿ“ฑ๐Ÿ’ป

๐‹๐ข๐ง๐ค๐Ÿ‘‡:-

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Save this list and start crushing your tech goals today!โœ…๏ธ
โค1
EY is hiring!
Position: Data Analytics - Associate
Qualifications: Bachelor's/ Master's Degree
Salary: 6 - 13 LPA (Expected)
Experience: Freshers/ Experienced
Location: Across India

๐Ÿ“ŒApply Now: https://careers.ey.com/ey/job/Kochi-Reporting-and-Data-Analytics-Associate-KL-682303/1232867801/

๐Ÿ‘‰ WhatsApp Channel: https://whatsapp.com/channel/0029VaI5CV93AzNUiZ5Tt226

๐Ÿ‘‰ Telegram Channel: https://t.me/addlist/4q2PYC0pH_VjZDk5

All the best! ๐Ÿ‘๐Ÿ‘
โค1
Role: Tableau + SQL Developer
๐Ÿ“ Location: Bangalore / Hyderabad
๐Ÿง  Experience: 3 โ€“ 7 Years
๐Ÿ”‘ Skills:
Strong expertise in Tableau and SQL
๐Ÿ”„ Good to have: Experience in Tableau to Power BI migration
๐Ÿข Preferred: Candidates from Tier-1 companies
If you're looking to work on impactful projects and be part of a high-performance team โ€” we want to hear from you!
Please share your Resume to divyam@psrtek.com
โค1
Forwarded from Python for Data Analysts
๐Ÿฏ ๐—™๐—ฟ๐—ฒ๐—ฒ ๐— ๐—ถ๐—ฐ๐—ฟ๐—ผ๐˜€๐—ผ๐—ณ๐˜ ๐—–๐—ผ๐˜‚๐—ฟ๐˜€๐—ฒ๐˜€ ๐˜„๐—ถ๐˜๐—ต ๐—–๐—ฒ๐—ฟ๐˜๐—ถ๐—ณ๐—ถ๐—ฐ๐—ฎ๐˜๐—ฒ๐˜€ ๐—•๐—ผ๐—ผ๐˜€๐˜ ๐—ฌ๐—ผ๐˜‚๐—ฟ ๐—–๐—ฎ๐—ฟ๐—ฒ๐—ฒ๐—ฟ ๐—ถ๐—ป ๐Ÿฎ๐Ÿฌ๐Ÿฎ๐Ÿฑ๐Ÿ˜

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These certifications will help you stand out in interviews and open new career opportunities in techโœ…๏ธ
โค1
Hiring: Data Scientist & Senior Data Scientist ๐Ÿš€

Join our dynamic team at KreditBee, one of Indiaโ€™s fastest-growing fintech platforms!

Location: Bangalore (Work from Office, 5 days a week)
Qualification: B.E / B.Tech in Computer Science
Experience: 2 to 6 years
Key Skills: Python, SQL, AWS, Credit risk modeling
Domain: Fintech background preferred
Notice Period: Immediate joiners or up to 30 days

Note: Finance Knowledge for model building

If youโ€™re interested, please share your CV at
deekshitha.s@kreditbee.in
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