"ARIA Landmarks" are used to enhance the accessibility of web content. ARIA stands for "Accessible Rich Internet Applications". These landmarks help screen readers understand the purpose of different areas of a webpage, making navigation and interaction easier.

Control flow, data flow, and path coverage are core types of static analysis techniques. Path coverage ensures that every potential route through a given part of the code is executed, thereby identifying areas that have not been tested.

SonarQube is a popular tool used for static code analysis. It scans source code for vulnerabilities, bugs, and code smells, providing a comprehensive overview of code quality. JIRA, Selenium, and Jenkins serve different purposes in the software development lifecycle.

A Performance Tester focuses on assessing the application's speed, responsiveness, stability under load, etc. These are non-functional aspects. On the other hand, a Functional Tester primarily ensures that the software behaves according to the specified requirements, which includes validating user flows, boundary conditions, and UI consistency.

Risk Mitigation involves taking steps to reduce the adverse effects of risks. In this case, strategies such as redistributing tasks, hiring a temporary resource, or adjusting timelines can be considered to manage the risk of project delays caused by the resignation.

Scalability Testing focuses on measuring a system's capacity to scale up based on the load it can handle. For a cloud-based storage service, understanding the point at which concurrent uploads start affecting speed is essential. This ensures that as user numbers grow, the service remains efficient and reliable.

Stability: Stress testing aims to determine a system's robustness by pushing it beyond its limits. When the system fails, it's crucial to assess its stability in terms of recovery and ensure that it doesn't compromise the data integrity and returns to its stable state.

For mobile apps, it's imperative to test both Landscape and Portrait modes when conducting functional testing. This ensures that the application's functionality remains consistent and error-free regardless of the orientation. Given that users might switch between modes frequently, it's crucial to verify the app's behavior in both scenarios.

Data-driven scripting allows the separation of test scripts from the test data. This means one script can be executed with multiple sets of test data. As a result, the number of scripts needed is reduced, making test automation more efficient and manageable. You can test various scenarios using the same script by merely changing the input data.

In UI/UX testing, the main focus is on user interface and user experience. It ensures that the software or application is user-friendly and provides a smooth experience. Factors like alignment, colors, button sizes, and responsiveness are critically evaluated.