White-Box Testing Quiz

What is the primary goal of white-box testing?

• To test the functionality of the software without knowledge of its internal structure

• To test the internal logic and structure of the software

• To verify that the software meets the user requirements

• To evaluate the performance of the software

Answer explanation

To test the internal logic and structure of the software

What does cyclomatic complexity measure?

• The number of lines of code in a program

• The number of distinct paths through the program's control flow graph

• The complexity of the software's user interface

• The number of variables used in the program

Answer explanation

Cyclomatic complexity measures the number of distinct paths through the program's control flow graph, not the number of lines of code, variables, or the software's user interface.

Which of the following is NOT a form of logic coverage in white-box testing?

• Statement Coverage

• Branch Coverage

• Condition Coverage

• User Acceptance Testing

Answer explanation

User Acceptance Testing is NOT a form of logic coverage in white-box testing, as it is a form of black-box testing where end-users validate the system's functionality against their requirements.

Which of the following is a reason why white-box testing is necessary?

• It is less expensive than black-box testing.

• It provides complete test coverage by ensuring that all code paths are executed.

• It is used only after black-box testing is completed.

• It is suitable for testing the software's usability.

Answer explanation

White-box testing is necessary because it provides complete test coverage by ensuring that all code paths are executed.

What does the "decision/condition coverage" criterion ensure?

• Each condition in a decision is evaluated to both true and false.

• Each decision is evaluated to both true and false, and each condition within decisions is also evaluated.

• Each statement in the code is executed.

• All paths through the program are tested.

Answer explanation

The 'decision/condition coverage' criterion ensures that each decision is evaluated to both true and false, and each condition within decisions is also evaluated.

What does statement coverage aim to achieve?

• Ensure that all branches in the control flow graph are tested.

• Ensure that every line of code is executed at least once.

• Ensure that all possible conditions are tested.

• Ensure that all functional requirements are met.

Answer explanation

Ensure that every line of code is executed at least once.

Which testing technique ensures that every edge in the control flow graph is traversed at least once?

• Statement Coverage

• Branch Coverage

• Path Coverage

• Condition Coverage

Answer explanation

Path Coverage ensures that every edge in the control flow graph is traversed at least once.

In the context of condition coverage, if a condition is expressed as (A OR B), how many test cases are needed to achieve full condition coverage?

• 2

• 3

• 4

• 1

Answer explanation

In the context of condition coverage, if a condition is expressed as (A OR B), two test cases are needed to achieve full condition coverage by testing both A and B separately.

If a program has 5 nodes and 7 edges in its control flow graph, and it consists of 2 separate components, what is the cyclomatic complexity of the program?

• 4

• 6

• 7

• 8

In the context of condition coverage, if a condition is expressed as (A OR B)(A \text{ OR } B)(A OR B), how many test cases are needed to achieve full condition coverage?

• 2

• 3

• 4

• 1