Final answer:
Fault-based testing is best reserved for operations and classes that are critical or suspect. This approach aims to identify and expose faults or defects in the system under test by intentionally introducing errors or faults.
Step-by-step explanation:
Fault-based testing is best reserved for operations and classes that are critical or suspect. This approach aims to identify and expose faults or defects in the system under test by intentionally introducing errors or faults. It is particularly useful for detecting vulnerabilities, weaknesses, or flaws in critical components of software or algorithms.