Python Interview Questions · interview question
When should a Python developer choose __slots__ deliberately?
Multiple choiceMediumpython-interview-2026interviewpythonuse
Answer and explanation
Correct answer
C. Use __slots__ when you have many lightweight instances and a controlled attribute set that genuinely benefits from lower overhead.
Why
Use __slots__ when you have many lightweight instances and a controlled attribute set that genuinely benefits from lower overhead. Interviewers often ask this to see whether you can connect the concept to real design decisions.
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