Preparing for a Python Development interview at WNS? In this video, we cover 15 essential questions you may encounter, along with sample answers and key points to consider for each question. This guide will equip you with the knowledge to tackle your interview with confidence, helping you to articulate your Python skills effectively.
0: 00 – Introduction
0: 20 – Q1: Why is Python suitable for automation, analytics, and backend development at a company like WNS?
1: 24 – Q2: Explain the difference between lists, tuples, sets, and dictionaries in Python. When would you use each?
2: 16 – Q3: How does Python manage memory, and what causes memory leaks in Python applications?
3: 13 – Q4: What are decorators in Python, and where would you use them in a production project?
4: 06 – Q5: What is the difference between an iterator and a generator, and why are generators useful for large datasets?
4: 56 – Q6: How would you handle exceptions in a Python application that processes client files?
5: 49 – Q7: What is the difference between shallow copy and deep copy in Python?
6: 42 – Q8: Explain Python’s GIL and how you would choose between threading, multiprocessing, and asynchronous programming.
7: 39 – Q9: How would you design a reliable Python script to extract, transform, and load daily business data?
8: 36 – Q10: How do you improve the performance of slow Python code?
9: 32 – Q11: How would you build and secure a Python REST API for an internal business application?
10: 33 – Q12: What is the difference between unit testing, integration testing, and end-to-end testing in Python?
11: 27 – Q13: How do you manage dependencies and environments for a Python project?
12: 23 – Q14: How would you process a large CSV file without exhausting memory?
13: 18 – Q15: Describe a Python project you delivered and explain how you ensured quality, maintainability, and business impact.
14: 15 – Like & Share
In this video, we explored crucial Python interview questions, covering topics from Python’s memory management to the differences between various data structures. Make sure to like, subscribe, and comment with your topic requests for future videos! About Interview Guide: Interview Guide is a YouTube channel dedicated to tech interview preparation. We publish concise interview Q&A videos covering programming concepts, system design, data structures, and role-specific prep for software engineers.

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