Python Interview Questions · interview question
Which practice avoids a common mistake with Trie / Prefix Tree?
Multiple choiceMediumpython-interview-2026interviewpythonpitfall
Answer and explanation
Correct answer
B. Do not ignore the memory cost of storing many nodes when the input set is small or exact-key lookup would be enough.
Why
Do not ignore the memory cost of storing many nodes when the input set is small or exact-key lookup would be enough. This is a common failure mode in real Python code and a frequent interview follow-up.
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