To answer this question, let's go through each option to understand why it is correct or incorrect:
Option A) The goal/purpose of testing is to demonstrate that the program works.
This option is incorrect because testing is not solely focused on demonstrating that the program works. Testing is also performed to find defects or issues in the software.
Option B) The purpose of testing is to demonstrate that the program is defect-free.
This option is incorrect because testing does not guarantee that the program is completely defect-free. Testing helps in finding defects, but it does not guarantee that no defects exist in the program.
Option C) The purpose of testing is to demonstrate that the program does what it is supposed to do.
This option is incorrect because testing is not only about demonstrating that the program performs its intended functions. It is also about finding defects and ensuring the program behaves as expected.
Option D) Testing is executing software for the purpose of finding defects.
This option is correct because testing involves executing the software with the intention of identifying defects or issues. Testing helps in uncovering problems, verifying functionality, and ensuring the software meets the desired quality standards.
The correct answer is D. This option is correct because testing is primarily focused on executing software to discover defects.