Java Interview Questions · interview question
In Java, which comparison about Adjacency List vs Adjacency Matrix is accurate?
Multiple choiceEasyjava-interview-2026interviewjavacomparison
Answer and explanation
Correct answer
A. Adjacency lists save space for sparse graphs, while adjacency matrices give constant-time edge existence checks.
Why
Adjacency lists save space for sparse graphs, while adjacency matrices give constant-time edge existence checks. This is the comparison that usually separates memorization from understanding.
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