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6,405 python engineer interview questions shared by candidates

Questions asked in Tech Mahindra core Python interview One, if you’re working on a Django application that is experiencing performance issue due to insufficient database queries, so how will you optimise these database query in Django? 2, how to optimise insufficient database queries in Django application causing performance issue Three how to implement a custom cash? For mechanism in python, to optimise the performance of a function Five. If cash is expensive, how should you able to cachet and Store result be saved upon the functional inputs? Six. How would you implement this using a decorator? Basically accustom python decorator for cashing? Give a coding, example for the 7SAPA that allows a user to upload a large file, so what consideration would you make to ensure the process efficient and reliable? Seven implement a custom data structure in python, that support, efficient insertion, efficient, deletion, and random axis Eight how to optimise data processing of a large data set using panda set to reduce memory usage and improve performance, implement the same later and explain what is the efficiency reduce memory usage improve performance Nine. Write a quote to optimise large data set processing using data type junking and vectoring operations in pandas.
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core python - senior level

Interviewed at Tech Mahindra

3.4★
Jun 1, 2026

Questions asked in Tech Mahindra core Python interview One, if you’re working on a Django application that is experiencing performance issue due to insufficient database queries, so how will you optimise these database query in Django? 2, how to optimise insufficient database queries in Django application causing performance issue Three how to implement a custom cash? For mechanism in python, to optimise the performance of a function Five. If cash is expensive, how should you able to cachet and Store result be saved upon the functional inputs? Six. How would you implement this using a decorator? Basically accustom python decorator for cashing? Give a coding, example for the 7SAPA that allows a user to upload a large file, so what consideration would you make to ensure the process efficient and reliable? Seven implement a custom data structure in python, that support, efficient insertion, efficient, deletion, and random axis Eight how to optimise data processing of a large data set using panda set to reduce memory usage and improve performance, implement the same later and explain what is the efficiency reduce memory usage improve performance Nine. Write a quote to optimise large data set processing using data type junking and vectoring operations in pandas.

RAG vs Fine-Tuning what are issues you faced during local LLM Deployment? MySQL/PostgreSQL Indexes Docker CMD vs ENTRYPOINT Docker COPY vs ADD Reranking in RAG why you used Llama 3.2? what Llama 3.2 Parameters affects output? what is Retrieval in LangChain? FastAPI Concurrency vs Parallelism How to Monitor Failed Celery Tasks?
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Python Gen AI engineer

Interviewed at Infosys

3.6★
Jun 23, 2026

RAG vs Fine-Tuning what are issues you faced during local LLM Deployment? MySQL/PostgreSQL Indexes Docker CMD vs ENTRYPOINT Docker COPY vs ADD Reranking in RAG why you used Llama 3.2? what Llama 3.2 Parameters affects output? what is Retrieval in LangChain? FastAPI Concurrency vs Parallelism How to Monitor Failed Celery Tasks?

Round-1 Questions: Basically they covered all topics from Python but question levels was easy. Everyone can crack the question if they have good basic knowledge of Python. Round-2 Questions(Technical Round-1): This interview was bit tricky. They provide some situations and conditions, you have to solve the question using Data Structure & Algorithm. You have to write the code in Text-Editor and explain it. Also in this round, they ask from Computer Networking question, if you know you can get some advantage from this otherwise no issue, you can cover from your Python and DSA knowledge. Round-3(Technical Round-2) Questions: This round, they ask from Python like List ,Set ,Dictionary , Algorithms and some situation based questions. Round-4(Manager's Round) Questions: This round was so fun, I have enjoyed a lot in this round. If you cleared previous rounds then you're 100% ready to get offer letter from Alethea. Don't worry. Basically this round was knowing your personality , the way you think , what's you weaknesses , strong points , and many more. After this round you'll definitely have a good image for Alethea. Good Luck.
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Junior Python Developer

Interviewed at Alethea Communications Technologies

4.2★
May 20, 2021

Round-1 Questions: Basically they covered all topics from Python but question levels was easy. Everyone can crack the question if they have good basic knowledge of Python. Round-2 Questions(Technical Round-1): This interview was bit tricky. They provide some situations and conditions, you have to solve the question using Data Structure & Algorithm. You have to write the code in Text-Editor and explain it. Also in this round, they ask from Computer Networking question, if you know you can get some advantage from this otherwise no issue, you can cover from your Python and DSA knowledge. Round-3(Technical Round-2) Questions: This round, they ask from Python like List ,Set ,Dictionary , Algorithms and some situation based questions. Round-4(Manager's Round) Questions: This round was so fun, I have enjoyed a lot in this round. If you cleared previous rounds then you're 100% ready to get offer letter from Alethea. Don't worry. Basically this round was knowing your personality , the way you think , what's you weaknesses , strong points , and many more. After this round you'll definitely have a good image for Alethea. Good Luck.

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