DSA · Theory

Traversal of Graph

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Theory

807/810

Traversal of Graph

Traversal of Graph sits in a city map. Riya’s job is bus routes. Write that first.

Traversal of Graph on the board — BFS queue / DFS stack. Then say what bus routes looks like after.

Without Traversal of Graph, a city map gets messy and bus routes is hard to trust.

Use Traversal of Graph when bus routes must stay clear. If a simpler DSA step works, use that instead.

Traversal of Graph trap — no visited set → infinite loop. Riya loses marks for that every viva.

Place Traversal of Graph next to nearby DSA work — BFS queue / DFS stack is the link.

Close Traversal of Graph with — “If I skip it, bus routes goes wrong like this: no visited set → infinite loop.”

Exam tip

For Traversal of Graph: definition + a city map + one failure.

Example

# adjacency list
graph = {
    "A": [("B", 2), ("C", 5)],
    "B": [("A", 2), ("C", 1)],
    "C": [("A", 5), ("B", 1)],
}
for u, edges in graph.items():
    print(u, "->", edges)

Traversal of Graph — graphs are often stored as adjacency lists: vertex → list of (neighbor, weight).

Short notes

DefTraversal of Graph — Riya uses it for bus routes in a city map.
RuleTraversal of Graph → BFS queue / DFS stack.
RememberTraversal of Graph + Big-O (a city map).
UseTraversal of Graph in a city map (bus routes).
TrapTraversal of Graph — no visited set → infinite loop.
ExTraversal of Graph → bus routes.

DSA · Theory

Traversal of Graph

← All stacks

Theory

807/810

Traversal of Graph

Traversal of Graph sits in a city map. Riya’s job is bus routes. Write that first.

Traversal of Graph on the board — BFS queue / DFS stack. Then say what bus routes looks like after.

Without Traversal of Graph, a city map gets messy and bus routes is hard to trust.

Use Traversal of Graph when bus routes must stay clear. If a simpler DSA step works, use that instead.

Traversal of Graph trap — no visited set → infinite loop. Riya loses marks for that every viva.

Place Traversal of Graph next to nearby DSA work — BFS queue / DFS stack is the link.

Close Traversal of Graph with — “If I skip it, bus routes goes wrong like this: no visited set → infinite loop.”

Exam tip

For Traversal of Graph: definition + a city map + one failure.

Example

# adjacency list
graph = {
    "A": [("B", 2), ("C", 5)],
    "B": [("A", 2), ("C", 1)],
    "C": [("A", 5), ("B", 1)],
}
for u, edges in graph.items():
    print(u, "->", edges)

Traversal of Graph — graphs are often stored as adjacency lists: vertex → list of (neighbor, weight).

Short notes

DefTraversal of Graph — Riya uses it for bus routes in a city map.
RuleTraversal of Graph → BFS queue / DFS stack.
RememberTraversal of Graph + Big-O (a city map).
UseTraversal of Graph in a city map (bus routes).
TrapTraversal of Graph — no visited set → infinite loop.
ExTraversal of Graph → bus routes.

Traversal of Graph

Example

Short notes

Questions

Traversal of Graph

Example

Short notes

Questions