Senior Python Developer

Description

Interview questions for Senior Python Developer

Interview Questions (80)

Q1Do you agree that Python is often called an easy language?
Motivational
Q2What are the pitfalls and limitations of Python?
Technical
Q3How does a framework differ from a library?
Technical
Q4How do you keep a large codebase maintainable?
Technical
Q5What is monkey patching? Is it ever a good idea?
Technical
Q6How are dict and set implemented? What's the lookup complexity and the memory cost?
Technical
Q7Does Python support multiple inheritance? How does it solve the diamond problem?
Technical
Q8What is the MRO and how does it work?
Technical
Q9Does Python have an assignment operator? How is assignment different from C or C++?
Technical
Q10What are descriptors? How do they differ from decorators?
Technical
Q11Are function arguments passed by value or by reference?
Technical
Q12What are .pth files?
Technical
Q13Which objects in Python 3.12 are made immortal and why was that worth doing?
Technical
Q14What problem does Python 3.12's new syntax for generics and a type statement solve that TypeVar didn't?
Technical
Q15You've inherited a large untyped codebase and you're asked to add type checking. How would you sequence that work?
Experience
Q16You have a memory leak in a production application. How do you find and fix it?
Situational
Q17You need to process a file that doesn't fit in memory. How?
Situational
Q18How would you profile a Python application?
Technical
Q19What is __pycache__, and why does Python generate .pyc files?
Technical
Q20What is string interning? Why does Python use it?
Technical
Q21Why doesn't Python optimize tail recursion? How would you get the same effect?
Technical
Q22You're asked to optimize a Python web application under high load. How do you approach it?
Situational
Q23What does the PYTHONOPTIMIZE flag do?
Technical
Q24What advantages do NumPy arrays have over nested Python lists?
Technical
Q25How do you distribute Python code effectively?
Technical
Q26How does Python handle binary dependencies? What are wheels and eggs?
Technical
Q27What package managers does Python have, and which would you recommend?
Technical
Q28How do you handle transitive dependencies?
Technical
Q29What are Cython, IronPython and PyPy? Why do alternative implementations exist?
Technical
Q30How do you call C from Python, and Python from C?
Technical
Q31Is Python a functional programming language?
Technical
Q32What are the pitfalls of writing functional code in Python?
Technical
Q33How do you implement immutability and higher-order functions in Python?
Technical
Q34What is the difference between concurrency and parallelism?
Technical
Q35What is the GIL, and how does it affect concurrency and async?
Technical
Q36What are sub-interpreters, and how do they differ from threads and from separate processes?
Technical
Q37Compare async programming, multithreading and multiprocessing.
Technical
Q38A producer thread generates data faster than a consumer can process it. How do you handle it?
Situational
Q39How do you debug async code?
Technical
Q40What is backpressure in async systems, and how do you handle it?
Technical
Q41How can async programming improve the scalability of a web application?
Motivational
Q42Write a producer-consumer pattern with asyncio.Queue, with multiple producers and consumers.
Technical
Q43How would you design a high-performance async API server?
Technical
Q44How do you integrate async code with synchronous libraries?
Technical
Q45What are the limitations of async programming in Python?
Technical
Q46Give an example of filter and reduce over an iterable.
Technical
Q47Write a function that reverses a generator.
Technical
Q48Implement a function with a "static variable" (for example, a call counter) without writing any code outside the function.
Technical
Q49Which methods are called, and in what order, when print(A() + B()) runs?
Technical
Q50Implement a dictionary from scratch using core Python.
Technical
Q51What is the output of this code?
Technical
Q52Put these functions in order of efficiency. How would you test your answer?
Technical
Q53Write a one-liner that counts capital letters in a file, even if the file doesn't fit in memory.
Technical
Q54What is the output of this code? Why? Is this inheritance?
Technical
Q55How is this possible?
Technical
Q56What is wrong with this code? Why would it be needed?
Technical
Q57What are the differences between a list and a tuple in Python?
Technical
Q58What is a namespace?
Technical
Q59What are Python modules? What are they used for?
Technical
Q60Specify the difference between local and global variables.
Technical
Q61Is Python case-sensitive?
Technical
Q62Does Python require indentation?
Technical
Q63What are Python functions?
Technical
Q64Why do Python developers use continue, break, and pass?
Technical
Q65What are ways to generate a random number in Python?
Technical
Q66What are iterators in Python?
Technical
Q67What are Python documentation strings?
Technical
Q68Explain the use of subn(), sub(), and split() in the 're' module.
Technical
Q69Why do developers prefer NumPy arrays over Python lists?
Technical
Q70How does Python approach multithreading?
Technical
Q71What is inheritance? Name the main types of Python inheritance.
Technical
Q72Define monkey-patching.
Technical
Q73Define polymorphism in Python.
Technical
Q74What are the differences between the three popular libraries: Django, Flask, and Pyramid?
Technical
Q75What is the use of the map function in Python?
Technical
Q76What are the differences between Wheels and Eggs?
Technical
Q77What is the purpose of Python non-local statements?
Technical
Q78How do developers use 'with' in Python?
Technical
Q79How is Python exception handling different from that in Java?
Technical
Q80Name the differences between functional and object-oriented programming.
Technical