Which representation is better for Sparse vs Dense graphs?

Difficulty: 5/10

graph representation, adjacency list, adjacency matrix

Graph Representation Selection

For sparse graphs, an adjacency list is generally better because the number of edges is much smaller than V², so storing only existing edges saves memory. For dense graphs, an adjacency matrix can be appropriate because most possible edges exist and O(1) edge lookup can be valuable.

javascript

1
Sparse graph: Prefer adjacency list.
2
Dense graph: Matrix can be attractive.
3
Need O(1) edge lookup: Matrix is advantageous.
4
Need efficient neighbor traversal: List is usually advantageous.

Scenario Questions

0-2 years experience

Follow-up Questions