Question

The following statement refers to decision coverage:

"When the code contains only a single 'if' statement and no loops or CASE statements, and its execution is not nested within the test, any single test case we run will result in 50% decision coverage."
Which of the following statement is correct?
A. The statement is true. Any single test case provides 100% statement coverage andtherefore 50% decision coverage
B. The statement is true. Any single test case would cause the outcome of the "if" statement tobe either true or false
C. The statement is false. A single test case can only guarantee 25% decision coverage in this case
D. The statement is false. The statement is too broad. It may be correct or not, depending on the tested software

Answer 1

The statement is false. A single test case can only guarantee 25% decision coverage in this case.

Step-by-step explanation:

The correct answer is C. The statement is false. A single test case can only guarantee 25% decision coverage in this case. Decision coverage measures the degree to which the decision points in a program have been exercised. In the given scenario, there is only one 'if' statement, which means there is only one decision point. To achieve 100% decision coverage, both possible outcomes of the 'if' statement need to be tested, which requires at least two test cases. Therefore, a single test case can only guarantee 50% decision coverage.