Python Interview Test for Data Analyst 2025 | Beginner Level

Are you preparing for a Python interview for a beginner Data Analyst role? In this video, we tackle a realistic Python coding test example, designed to be completed in just 20 minutes. With 6 challenging questions, we walk through each step, breaking down the logic and thought process while sharing practical tips to solve similar problems in your own interview.

What we cover:
1. Selecting & Ordering Columns - Learn how to navigate a DataFrame to select and order columns effectively.
2. Applying Conditions - Master filtering data with conditions, ensuring you retrieve exactly what you need.
3. Conditioning with Aggregation & Group By - Understand how to group data and calculate meaningful summaries with conditions.
4. Data Cleaning & Advanced Operations - Dive into cleaning messy data while applying conditions and aggregations simultaneously.
5. Aggregations with Multiple Conditions - Discover techniques to summarize data using more complex multi-condition filters.
6. Conditioning Based on Another DataFrame - Solve advanced scenarios by filtering a DataFrame using a list derived from another DataFrame.

We also dive into the theory behind each solution, explaining not just how but why the approach works. This video is packed with realistic examples and tips to help you stay calm under time pressure and solve challenges with confidence. Whether you’re new to Python or brushing up for an interview, this is your ultimate guide to success.

🔔 Don’t forget to like, share, and subscribe for more Python tutorials, coding tests, and interview preparation tips tailored for data analysts!

Chapters:
00:00 – Intro
00:52 – Raw Data
02:14 – Question 1: Selection & Ordering
03:35 – Question 2: Conditions
04:58 – Question 3: Aggregations, Group by, Conditions & Order
07:08 – Question 4: Multiple Aggregations, Cleaning, Group by & Conditions
11:25 – Question 5: Filter from another table/list, Aggregations, Group by & Conditions
15:37 – Question 6: Filter from another table/list, Aggregations, Group by & Conditions

EXCEL:

SQL:

PYTHON:

[YiannisPi]

Let me know how long it took you to complete!

[NafisAnsari-vrxq]

This is insightful. Thanks for the tests, you just got a sub to the channel😁