Python for Data Analysts
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Find top Python resources from global universities, cool projects, and learning materials for data analytics.

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Tuple Slicing in Python ๐Ÿ‘†
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๐——๐—ฎ๐˜๐—ฎ ๐—”๐—ป๐—ฎ๐—น๐˜†๐˜๐—ถ๐—ฐ๐˜€ ๐—ฉ๐—ถ๐—ฟ๐˜๐˜‚๐—ฎ๐—น ๐—œ๐—ป๐˜๐—ฒ๐—ฟ๐—ป๐˜€๐—ต๐—ถ๐—ฝ ๐—ฃ๐—ฟ๐—ผ๐—ด๐—ฟ๐—ฎ๐—บ๐˜€ ๐—œ๐—ป ๐—ง๐—ผ๐—ฝ ๐—–๐—ผ๐—บ๐—ฝ๐—ฎ๐—ป๐—ถ๐—ฒ๐˜€๐Ÿ˜

1๏ธโƒฃ BCG Data Science & Analytics Virtual Experience
2๏ธโƒฃ TATA Data Visualization Internship
3๏ธโƒฃ Accenture Data Analytics Virtual Internship

๐‹๐ข๐ง๐ค๐Ÿ‘‡:-

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Data Analyst Interview Questions & Preparation Tips

Be prepared with a mix of technical, analytical, and business-oriented interview questions.

1. Technical Questions (Data Analysis & Reporting)

SQL Questions:

How do you write a query to fetch the top 5 highest revenue-generating customers?

Explain the difference between INNER JOIN, LEFT JOIN, and FULL OUTER JOIN.

How would you optimize a slow-running query?

What are CTEs and when would you use them?

Data Visualization (Power BI / Tableau / Excel)

How would you create a dashboard to track key performance metrics?

Explain the difference between measures and calculated columns in Power BI.

How do you handle missing data in Tableau?

What are DAX functions, and can you give an example?

ETL & Data Processing (Alteryx, Power BI, Excel)

What is ETL, and how does it relate to BI?

Have you used Alteryx for data transformation? Explain a complex workflow you built.

How do you automate reporting using Power Query in Excel?


2. Business and Analytical Questions

How do you define KPIs for a business process?

Give an example of how you used data to drive a business decision.

How would you identify cost-saving opportunities in a reporting process?

Explain a time when your report uncovered a hidden business insight.


3. Scenario-Based & Behavioral Questions

Stakeholder Management:

How do you handle a situation where different business units have conflicting reporting requirements?

How do you explain complex data insights to non-technical stakeholders?

Problem-Solving & Debugging:

What would you do if your report is showing incorrect numbers?

How do you ensure the accuracy of a new KPI you introduced?

Project Management & Process Improvement:

Have you led a project to automate or improve a reporting process?

What steps do you take to ensure the timely delivery of reports?


4. Industry-Specific Questions (Credit Reporting & Financial Services)

What are some key credit risk metrics used in financial services?

How would you analyze trends in customer credit behavior?

How do you ensure compliance and data security in reporting?


5. General HR Questions

Why do you want to work at this company?

Tell me about a challenging project and how you handled it.

What are your strengths and weaknesses?

Where do you see yourself in five years?

How to Prepare?

Brush up on SQL, Power BI, and ETL tools (especially Alteryx).

Learn about key financial and credit reporting metrics.(varies company to company)

Practice explaining data-driven insights in a business-friendly manner.

Be ready to showcase problem-solving skills with real-world examples.

React with โค๏ธ if you want me to also post sample answer for the above questions

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

Hope it helps :)
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๐—™๐—ฅ๐—˜๐—˜ ๐—–๐—ฒ๐—ฟ๐˜๐—ถ๐—ณ๐—ถ๐—ฐ๐—ฎ๐˜๐—ถ๐—ผ๐—ป ๐—–๐—ผ๐˜‚๐—ฟ๐˜€๐—ฒ๐˜€ ๐—ง๐—ผ ๐—ฆ๐—ธ๐˜†๐—ฟ๐—ผ๐—ฐ๐—ธ๐—ฒ๐˜ ๐—ฌ๐—ผ๐˜‚๐—ฟ ๐—–๐—ฎ๐—ฟ๐—ฒ๐—ฒ๐—ฟ๐Ÿ˜

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Most Important Python Topics for Data Analyst Interview:

#Basics of Python:

1. Data Types

2. Lists

3. Dictionaries

4. Control Structures:

- if-elif-else

- Loops

5. Functions

6. Practice basic FAQs questions, below mentioned are few examples:

- How to reverse a string in Python?

- How to find the largest/smallest number in a list?

- How to remove duplicates from a list?

- How to count the occurrences of each element in a list?

- How to check if a string is a palindrome?

#Pandas:

1. Pandas Data Structures (Series, DataFrame)

2. Creating and Manipulating DataFrames

3. Filtering and Selecting Data

4. Grouping and Aggregating Data

5. Handling Missing Values

6. Merging and Joining DataFrames

7. Adding and Removing Columns

8. Exploratory Data Analysis (EDA):

- Descriptive Statistics

- Data Visualization with Pandas (Line Plots, Bar Plots, Histograms)

- Correlation and Covariance

- Handling Duplicates

- Data Transformation

#Numpy:

1. NumPy Arrays

2. Array Operations:

- Creating Arrays

- Slicing and Indexing

- Arithmetic Operations

#Integration with Other Libraries:

1. Basic Data Visualization with Pandas (Line Plots, Bar Plots)

#Key Concepts to Revise:

1. Data Manipulation with Pandas and NumPy

2. Data Cleaning Techniques

3. File Handling (reading and writing CSV files, JSON files)

4. Handling Missing and Duplicate Values

5. Data Transformation (scaling, normalization)

6. Data Aggregation and Group Operations

7. Combining and Merging Datasets
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๐— ๐—ถ๐—ฐ๐—ฟ๐—ผ๐˜€๐—ผ๐—ณ๐˜ ๐Ÿญ๐Ÿฌ๐Ÿฌ% ๐—™๐—ฟ๐—ฒ๐—ฒ ๐—–๐—ผ๐˜‚๐—ฟ๐˜€๐—ฒ๐˜€ ๐—ณ๐—ผ๐—ฟ ๐—”๐˜‡๐˜‚๐—ฟ๐—ฒ, ๐—”๐—œ, ๐—–๐˜†๐—ฏ๐—ฒ๐—ฟ๐˜€๐—ฒ๐—ฐ๐˜‚๐—ฟ๐—ถ๐˜๐˜† & ๐— ๐—ผ๐—ฟ๐—ฒ๐Ÿ˜

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Enjoy Learning โœ…๏ธ
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Here are some most popular Python libraries for data visualization:

Matplotlib โ€“ The most fundamental library for static charts. Best for basic visualizations like line, bar, and scatter plots. Highly customizable but requires more coding.

Seaborn โ€“ Built on Matplotlib, it simplifies statistical data visualization with beautiful defaults. Ideal for correlation heatmaps, categorical plots, and distribution analysis.

Plotly โ€“ Best for interactive visualizations with zooming, hovering, and real-time updates. Great for dashboards, web applications, and 3D plotting.

Bokeh โ€“ Designed for interactive and web-based visualizations. Excellent for handling large datasets, streaming data, and integrating with Flask/Django.

Altair โ€“ A declarative library that makes complex statistical plots easy with minimal code. Best for quick and clean data exploration.

For static charts, start with Matplotlib or Seaborn. If you need interactivity, use Plotly or Bokeh. For quick EDA, Altair is a great choice.

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

Hope it helps :)

#python
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๐—™๐—ฅ๐—˜๐—˜ ๐— ๐—ถ๐—ฐ๐—ฟ๐—ผ๐˜€๐—ผ๐—ณ๐˜ ๐—–๐—ฒ๐—ฟ๐˜๐—ถ๐—ณ๐—ถ๐—ฐ๐—ฎ๐˜๐—ถ๐—ผ๐—ป ๐—–๐—ผ๐˜‚๐—ฟ๐˜€๐—ฒ๐˜€ ๐Ÿ˜

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Excel vs SQL vs Python (pandas):

1๏ธโƒฃ Filtering Data
โ†ณ Excel: =FILTER(A2:D100, B2:B100>50) (Excel 365 users)
โ†ณ SQL: SELECT * FROM table WHERE column > 50;
โ†ณ Python: df_filtered = df[df['column'] > 50]

2๏ธโƒฃ Sorting Data
โ†ณ Excel: Data โ†’ Sort (or =SORT(A2:A100, 1, TRUE))
โ†ณ SQL: SELECT * FROM table ORDER BY column ASC;
โ†ณ Python: df_sorted = df.sort_values(by="column")

3๏ธโƒฃ Counting Rows
โ†ณ Excel: =COUNTA(A:A)
โ†ณ SQL: SELECT COUNT(*) FROM table;
โ†ณ Python: row_count = len(df)

4๏ธโƒฃ Removing Duplicates
โ†ณ Excel: Data โ†’ Remove Duplicates
โ†ณ SQL: SELECT DISTINCT * FROM table;
โ†ณ Python: df_unique = df.drop_duplicates()

5๏ธโƒฃ Joining Tables
โ†ณ Excel: Power Query โ†’ Merge Queries (or VLOOKUP/XLOOKUP)
โ†ณ SQL: SELECT * FROM table1 JOIN table2 ON table1.id = table2.id;
โ†ณ Python: df_merged = pd.merge(df1, df2, on="id")

6๏ธโƒฃ Ranking Data
โ†ณ Excel: =RANK.EQ(A2, $A$2:$A$100)
โ†ณ SQL: SELECT column, RANK() OVER (ORDER BY column DESC) AS rank FROM table;
โ†ณ Python: df["rank"] = df["column"].rank(method="min", ascending=False)

7๏ธโƒฃ Moving Average Calculation
โ†ณ Excel: =AVERAGE(B2:B4) (manually for rolling window)
โ†ณ SQL: SELECT date, AVG(value) OVER (ORDER BY date ROWS BETWEEN 2 PRECEDING AND CURRENT ROW) AS moving_avg FROM table;
โ†ณ Python: df["moving_avg"] = df["value"].rolling(window=3).mean()

8๏ธโƒฃ Running Total
โ†ณ Excel: =SUM($B$2:B2) (drag down)
โ†ณ SQL: SELECT date, SUM(value) OVER (ORDER BY date) AS running_total FROM table;
โ†ณ Python: df["running_total"] = df["value"].cumsum()
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๐—ง๐—ผ๐—ฝ ๐—ฃ๐˜†๐˜๐—ต๐—ผ๐—ป ๐—œ๐—ป๐˜๐—ฒ๐—ฟ๐˜ƒ๐—ถ๐—ฒ๐˜„ ๐—ค๐˜‚๐—ฒ๐˜€๐˜๐—ถ๐—ผ๐—ป๐˜€ ๐—ณ๐—ผ๐—ฟ ๐Ÿฎ๐Ÿฌ๐Ÿฎ๐Ÿฑ โ€” ๐—ฅ๐—ฒ๐—ฐ๐—ฒ๐—ป๐˜๐—น๐˜† ๐—”๐˜€๐—ธ๐—ฒ๐—ฑ ๐—ฏ๐˜† ๐— ๐—ก๐—–๐˜€๐Ÿ˜

๐Ÿ“Œ Preparing for Python Interviews in 2025?๐Ÿ—ฃ

If youโ€™re aiming for roles in data analysis, backend development, or automation, Python is your key weaponโ€”and so is preparing with the right questions.๐Ÿ’ปโœจ๏ธ

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Crack your next Python interviewโœ…๏ธ
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Here is a powerful ๐—œ๐—ก๐—ง๐—˜๐—ฅ๐—ฉ๐—œ๐—˜๐—ช ๐—ง๐—œ๐—ฃ to help you land a job!

Most people who are skilled enough would be able to clear technical rounds with ease.

But when it comes to ๐—ฏ๐—ฒ๐—ต๐—ฎ๐˜ƒ๐—ถ๐—ผ๐—ฟ๐—ฎ๐—น/๐—ฐ๐˜‚๐—น๐˜๐˜‚๐—ฟ๐—ฒ ๐—ณ๐—ถ๐˜ rounds, some folks may falter and lose the potential offer.

Many companies schedule a behavioral round with a top-level manager in the organization to understand the culture fit (except for freshers).

One needs to clear this round to reach the salary negotiation round.

Here are some tips to clear such rounds:

1๏ธโƒฃ Once the HR schedules the interview, try to find the LinkedIn profile of the interviewer using the name in their email ID.

2๏ธโƒฃ Learn more about his/her past experiences and try to strike up a conversation on that during the interview.

3๏ธโƒฃ This shows that you have done good research and also helps strike a personal connection.

4๏ธโƒฃ Also, this is the round not just to evaluate if you're a fit for the company, but also to assess if the company is a right fit for you.

5๏ธโƒฃ Hence, feel free to ask many questions about your role and company to get a clear understanding before taking the offer. This shows that you really care about the role you're getting into.

๐Ÿ’ก ๐—•๐—ผ๐—ป๐˜‚๐˜€ ๐˜๐—ถ๐—ฝ - Be polite yet assertive in such interviews. It impresses a lot of senior folks.
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๐Ÿฑ ๐—™๐—ฟ๐—ฒ๐—ฒ ๐— ๐—œ๐—ง ๐—ฃ๐—ฟ๐—ผ๐—ด๐—ฟ๐—ฎ๐—บ๐—บ๐—ถ๐—ป๐—ด ๐—–๐—ผ๐˜‚๐—ฟ๐˜€๐—ฒ๐˜€ ๐—ง๐—ต๐—ฎ๐˜ ๐—˜๐˜ƒ๐—ฒ๐—ฟ๐˜† ๐—•๐—ฒ๐—ด๐—ถ๐—ป๐—ป๐—ฒ๐—ฟ ๐—ฆ๐—ต๐—ผ๐˜‚๐—น๐—ฑ ๐—ฆ๐˜๐—ฎ๐—ฟ๐˜ ๐—ช๐—ถ๐˜๐—ต๐Ÿ˜

๐Ÿ’ป Want to Learn Coding but Donโ€™t Know Where to Start?๐ŸŽฏ

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All The Best ๐ŸŽŠ
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0802-python-tutorial.pdf
614.5 KB
๐Ÿ“Œ PYTHON TUTORIALS
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๐Ÿณ ๐—™๐—ฅ๐—˜๐—˜ ๐—–๐—ผ๐˜‚๐—ฟ๐˜€๐—ฒ๐˜€ ๐—ง๐—ผ ๐— ๐—ฎ๐˜€๐˜๐—ฒ๐—ฟ ๐—ง๐—ฒ๐—ฐ๐—ต ๐—ฆ๐—ธ๐—ถ๐—น๐—น๐˜€ ๐—œ๐—ป ๐Ÿฎ๐Ÿฌ๐Ÿฎ๐Ÿฑ ๐Ÿ˜

If you dream of a tech career but donโ€™t want to break the bank, youโ€™re in the right place.

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Deloitte Recent Data Analyst Interview Questions Part-1
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Deloitte Recent Data Analyst Interview Questions Part-2
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๐Ÿฑ ๐—™๐—ฟ๐—ฒ๐—ฒ ๐— ๐—œ๐—ง ๐——๐—ฎ๐˜๐—ฎ ๐—”๐—ป๐—ฎ๐—น๐˜†๐˜๐—ถ๐—ฐ๐˜€ ๐—–๐—ผ๐˜‚๐—ฟ๐˜€๐—ฒ๐˜€ ๐—ง๐—ต๐—ฎ๐˜ ๐—ช๐—ถ๐—น๐—น ๐—•๐—ผ๐—ผ๐˜€๐˜ ๐—ฌ๐—ผ๐˜‚๐—ฟ ๐—–๐—ฎ๐—ฟ๐—ฒ๐—ฒ๐—ฟ๐Ÿ˜

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All The Best ๐ŸŽŠ
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WhatsApp is no longer a platform just for chat.

It's an educational goldmine.

If you do, youโ€™re sleeping on a goldmine of knowledge and community. WhatsApp channels are a great way to practice data science, make your own community, and find accountability partners.

I have curated the list of best WhatsApp channels to learn coding & data science for FREE

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๐—™๐—ฅ๐—˜๐—˜ ๐—–๐—ฒ๐—ฟ๐˜๐—ถ๐—ณ๐—ถ๐—ฐ๐—ฎ๐˜๐—ถ๐—ผ๐—ป๐˜€ ๐—™๐—ฟ๐—ผ๐—บ ๐—ง๐—ผ๐—ฝ ๐—–๐—ผ๐—บ๐—ฝ๐—ฎ๐—ป๐—ถ๐—ฒ๐˜€๐Ÿ˜

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