**CBSE NET JUNE 2012 PAPER ****III**

Which one of the following statements is incorrect ?

**(A) **The number of regions corresponds to the cyclomatic complexity.**(B) **Cyclometric complexity for a flow graph G is V(G) = N – E + 2, where E is the number of edges and N is the number of nodes in the flow graph.**(C)** Cyclometric complexity for a flow graph G is V(G) = E – N + 2, where E is the number of edges & N is the number of nodes in the flow graph.**(D) **Cyclometric complexity for a flow graph G is V(G) = P + 1, where P is the number of predicate nodes contained in the flow graph G.

**Ans: (****B**)

**Explanation:**

To solve above problem, first remember these 3 rules to compute the cyclomatic complexity.**1. The number of regions correspond to the cyclomatic complexity.****2. Cyclomatic complexity V(G) for a flow graph G, is defined as, ****V(G)=E-N+2**

where E=Number of flow graph edges

N=Number of flow graph nodes**3.Cyclomatic complexity,V(G) for a flow graph G, is defined as,****V(G)=P+1**

where P=Number of predicate nodes contained in flow graph G.

Now come to the solution for above problem,

According to the rules given in (1),(2) and (3), option B is incorrect.