Software Testability is simply how easily a software program can be tested. Which one characteristic does not lead to testable software?

Correct option is C

Software testability refers to the ease with which a software system can be tested. Several key characteristics contribute to making a software system more testable:
1. Observability: The ability to observe the internal state of the system during or after its execution. It helps testers to check if the system is behaving as expected by monitoring outputs, states, or logs.
2. Controllability: The ability to control the internal state or behavior of the software during testing. It allows testers to manipulate the system to execute specific conditions and scenarios for testing.
3. Repairability: This refers to how easily the software can be fixed once an issue is identified. While important in the context of maintenance, repairability does not directly influence testability. Testability is more about how easily you can verify if the system is functioning correctly, not how easily you can fix it.
4. Understandability: The ease with which the software and its components can be understood. The clearer the software design, the easier it is to test, because testers can more easily comprehend its behavior and structure.
Information Booster:
• Observability and controllability directly improve testability, as they allow testers to see the system's internal state and control its behavior.
• Repairability is important in the context of fixing bugs after testing, but it does not directly contribute to how testable the software is.
• Understandability helps testers design and execute tests more efficiently since they can easily grasp the structure and behavior of the software.
Additional Knowledge:
• Observability: Important for understanding system behavior during testing.
• Controllability: Important for being able to simulate specific test conditions.
• Understandability: Improves the ability to plan and execute tests effectively.