Who is responsible for testing a program to guard against logic errors?

The programmer is responsible for testing a program to guard against logic errors because they have a deep understanding of the code and its intended functionality. During the development process, programmers are tasked with creating robust algorithms and ensuring that the program behaves as expected under various conditions. This involves writing and running test cases to identify and fix any logic errors, which are mistakes in the program's design or implementation that lead to incorrect results, even when the syntax is correct.

While end users may encounter issues and report bugs, it is primarily the programmer's job to proactively test and verify that the logic of the code aligns with the requirements and specifications. The compiler focuses on syntax errors rather than logic errors and does not evaluate the program's intentions. Meanwhile, the project manager oversees the overall project but does not directly engage in the technical testing of the program's logic. Therefore, the most accurate answer is that the responsibility lies with the programmer.