Which of the following refers to internal software equality?*1 pointScalabilityReusabilityReliabilityUsability

Internal software quality refers to how the software performs from within, which includes its structure, design, and code.

1. Scalability: This refers to the ability of the software to handle increased workloads. It's about how well the software can adapt to increased demands without affecting its performance or functionality.

2. Reusability: This refers to the ability to use parts of the software in other projects without having to rewrite it entirely. It's about how well the software components can be used in different contexts or in various parts of the program.

3. Reliability: This refers to the ability of the software to perform its required functions under stated conditions for a specified period of time. It's about how well the software can perform consistently and predictably.

4. Usability: This refers to how user-friendly the software is. It's about how easy it is for the user to understand, learn, and use the software.

From these definitions, Reusability refers to internal software quality as it deals with the internal structure and code of the software that allows it to be used in different parts of the program or in other projects.