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GATE | GATE IT 2006 | Question 47
Consider the depth-first-search of an undirected graph with 3 vertices P, Q, and R. Let discovery time d(u) represent the time instant when the vertex u is first visited, and finish time f(u) represent the time instant when the vertex u is last visited. Given that
d(P) = 5 units f(P) = 12 units
d(Q) = 6 units f(Q) = 10 units
d(R) = 14 unit f(R) = 18 units
which one of the following statements is TRUE about the graph
d(P) = 5 units f(P) = 12 units
d(Q) = 6 units f(Q) = 10 units
d(R) = 14 unit f(R) = 18 units
which one of the following statements is TRUE about the graph
(A)
There is only one connected component
(B)
There are two connected components, and P and R are connected
(C)
There are two connected components, and Q and R are connected
(D)
There are two connected components, and P and Q are connected
Answer
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