GATE | GATE CS 2010 | Question 21

The cyclomatic complexity of each of the modules A and B shown below is 10. What is the cyclomatic complexity of the sequential integration shown on the right hand side?

(A) 19
(B) 21
(C) 20
(D) 10


Answer: (A)

Explanation:

Cyclomatic Complexity of module = Number of decision points + 1

Number of decision points in A = 10 - 1 = 9
Number of decision points in B = 10 - 1 = 9
Cyclomatic Complexity of the integration = Number of decision points + 1
                                         = (9 + 9) + 1
                                         = 19

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