Question: Suppose we perform Depth First Search (DFS) on a digraph G=(V,E) given by its adjacency list structure and label each node uV by d[u] and

Suppose we perform Depth First Search (DFS) on a digraph G=(V,E)
given by its adjacency list structure and label each node uV
by d[u]
and f[u]
, indicating the starting and finishing times of DFSvisit(u), as we learned in the course.
Consider an arbitrary pair of distinct vertices u
and v
such that there is a directed path from u
to v
in G
. Then that implies
(If more than one choice is correct, select the red choice.)
Question 2Answer
a.
d[u]
.
b.
None of the other choices.
c.
f[u]>f[v]
.
d.
More than one of the other choices are correct.
e.
d[u]
.

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