Control Flow and Functions Interview Questions | Python | NextRound

1Why is using a mutable default argument (e.g., `def f(x=[])`) considered a common pitfall?Intermediate

2What is the purpose of the `nonlocal` keyword, and how does it differ from `global`?Intermediate

3How does Python's `for` loop differ conceptually from a C-style `for` loop?Beginner

4How does structural pattern matching (`match`/`case`, introduced in Python 3.10) differ from a chain of `if`/`elif` statements?Intermediate

5What are first-class functions, and how does Python's treatment of functions as objects enable higher-order functions?Intermediate

6What is the purpose of the `else` clause on `for` and `while` loops, and when does it execute?Beginner

7How would you implement memoization for a recursive function, and what tradeoffs exist between manual caching and `functools.lru_cache`?Advanced

8What is the difference between positional, keyword, default, `*args`, and `**kwargs` parameters?Beginner

9Explain Python's LEGB rule for variable scope resolution.Intermediate

10How does Python's `for` loop differ conceptually from a C-style `for` loop?Beginner

11What are first-class functions, and how does Python's treatment of functions as objects enable higher-order functions?Intermediate

12How would you implement memoization for a recursive function, and what tradeoffs exist between manual caching and `functools.lru_cache`?Advanced

13What is the purpose of the `nonlocal` keyword, and how does it differ from `global`?Intermediate

14What is the difference between positional, keyword, default, `*args`, and `**kwargs` parameters?Beginner

15Why is using a mutable default argument (e.g., `def f(x=[])`) considered a common pitfall?Intermediate

16How does structural pattern matching (`match`/`case`, introduced in Python 3.10) differ from a chain of `if`/`elif` statements?Intermediate

17What is the purpose of the `else` clause on `for` and `while` loops, and when does it execute?Beginner

18Explain Python's LEGB rule for variable scope resolution.Intermediate