Q
Does CPython optimize tail-recursive calls (tail-call optimization)?
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A
Only in Python 3.11 and later
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B
No; tail calls still consume stack frames
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C
Yes, always
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D
Yes, when @tailrec is used
Correct Answer:
B. No; tail calls still consume stack frames
Explanation:
Python intentionally omits TCO to keep tracebacks complete. Scala has @tailrec; Python does not.
