Python Interview Questions · interview question
In Python, which comparison about Graphs and Adjacency Lists is accurate?
Multiple choiceEasypython-interview-2026interviewpythoncomparison
Answer and explanation
Correct answer
B. Adjacency lists are space-efficient for sparse graphs, while adjacency matrices trade more memory for constant-time edge existence checks.
Why
Adjacency lists are space-efficient for sparse graphs, while adjacency matrices trade more memory for constant-time edge existence checks. This is the comparison that usually separates memorization from understanding.
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