Question

1) 2) 3) integer A, B; input (A): while (A> 0) 5) A=2*A; 6) i (A < 20 or A> 30) 7) 8) 9) 10 lse B-A 2, 12) B-A 2 13) 14) output (A, B): 15) input (A): 16) end;

Answer 1

Decision coverage:

Given code is

integer A,B;
input(A);
while(A>0)
{
A=2*A;
if(A<20 or A>30)
{
b=A+2;
}
else{
B=A+2;
}
output(A,B);
input(A);
}
end;

Decision coverage = (number of decision outcomes executed )/total outcomes *100

Based on the flowchart The decision coverage is 71 %

Flowchart:

No c NO 5 G es It top

In order to get 100 % coverage the below are the testcases to include.

Testcase 1: A=22 and B =10
Testcase 2: A=15 and B=5

These two test cases are for both positive and negative cases which covers 100 % decision.