To answer this question, we need to understand the concepts of statement coverage and branch coverage in software testing.
Statement coverage refers to the percentage of statements in a program that have been executed during testing. It ensures that every statement in the program has been executed at least once. This helps in identifying any potential errors or flaws in individual statements.
Branch coverage, on the other hand, refers to the percentage of branches in a program that have been executed during testing. A branch is a decision point in the program, such as an IF statement or a loop. Branch coverage ensures that every possible branch in the program has been taken at least once. This helps in identifying any potential errors or flaws in the decision-making logic of the program.
Now, let's go through each option to understand why it is correct or incorrect:
Option A) That you have tested every statement in the program - This option is incorrect. Statement coverage ensures that every statement has been executed, but it does not guarantee that every branch has been taken.
Option B) That you have tested every statement and every branch in the program - This option is correct. Branch coverage ensures that every branch has been taken, in addition to every statement being executed. Therefore, this option covers both statement coverage and branch coverage.
Option C) That you have tested every IF statement in the program - This option is incorrect. Testing every IF statement does not guarantee that every branch has been taken, as there may be other decision points in the program that are not IF statements.
Option D) That you have tested every combination of values of IF statements in the program - This option is incorrect. While testing every combination of values of IF statements may help achieve branch coverage, it does not guarantee statement coverage or coverage of other decision points in the program.
The correct answer is B) That you have tested every statement and every branch in the program. This option covers both statement coverage and branch coverage, ensuring that every statement and every branch in the program have been executed during testing.