Which of the following concepts can be used to identify loops?
A. Depth first ordering
B. Dominators
C. Reducible graphs
Pick an option to check yourself, or open the answer below.
Show answer & explanation
Correct answer: D. A, B and C
Explanation
Loops in flow graphs are found using depth-first ordering (back edges), dominators (a back edge's head dominates its tail) and reducibility.
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