Final answer:
The statement is true; developers perform unit testing to validate the functionality of individual units or modules within a software application, ensuring each part works correctly on its own. Option A is correct.
Step-by-step explanation:
The answer to the question is A. True. In unit testing, the individual units or modules of a software are tested to ensure that each unit functions as expected. These tests are typically written and performed by the developers who created the units.
The goal of unit testing is to validate that each unit of the software performs correctly in isolation. This ensures that when the units are combined to form the full application, they are more likely to work correctly together.
Unit testing involves writing test cases for various parts of the code, which could include functions, methods, or classes, depending on the programming language used.
These test cases are designed to test the logic and functionality of the code. If a test fails, the developer can then address the issue immediately, which makes debugging easier and improves software quality.