Which testing practice focuses on evaluating each individual component in isolation before it is integrated into the larger system?

• A. Camel Case
• B. Conventions
• C. Unit Testing
• D. Catch

Answer: (C)

Unit testing isolates individual components to verify their behavior in a controlled setting before they’re integrated into the larger system. By testing the smallest testable parts—like a function or method—and using mocks or stubs to stand in for dependencies, you confirm that each piece meets its contract and works on its own. This focused approach makes it easier to locate and fix problems, since a failure points to a specific unit rather than to complex interactions across many parts. Other terms in the options don’t describe this practice: Camel Case is just a naming style, Conventions refer to coding or styling guidelines, and Catch is a testing framework rather than the practice of testing components in isolation.