Cloud-based mobile application testing offers scalable testing environments, meaning you can expand or reduce resources as per your testing needs. This scalability ensures flexibility and cost-effectiveness, allowing teams to test on multiple devices and configurations without the need for physical infrastructure, unlike traditional labs. Moreover, cloud-based testing isn't bound by geographic locations, ensuring wider test coverage.

Jenkins is a powerful and widely-used open-source tool that provides continuous integration and continuous delivery facilities for software development. Its extensive plugin system and integrations allow it to fit seamlessly into a DevOps environment, enabling automatic code integration, testing, and deployment processes.

Manual testing can become tedious and error-prone, especially for repetitive tasks or scenarios with extensive data inputs. Testing a complex application with numerous input fields manually can increase the risk of missing defects due to human error or oversight.

"Stubs" and "drivers" are used in Bottom-Up integration testing. Stubs are used to simulate lower modules (that are yet to be developed) while drivers simulate higher modules. It ensures that the main logic is tested early on.

A Walkthrough is an informal review process led by the author of the software item being reviewed. It's a form of peer review where participants can ask questions and make comments about possible issues. It doesn't have a fixed process and is generally considered to be more collaborative and flexible.

Integration Testing is specifically focused on the interfaces between units/modules and the interactions between different parts of a system. When multiple subsystems are interconnected, Integration Testing helps ensure that they all work together as expected, and there aren't any issues or data losses when data is passed from one subsystem to another.

Level AAA conformance is the highest and most stringent level in the Web Content Accessibility Guidelines (WCAG). While Level A addresses the most critical accessibility issues and Level AA deals with the biggest potential barriers, Level AAA criteria often address enhancements and may not be achievable for all types of web content due to its rigorous nature.

Risk assessment is vital in test planning and estimation because it allows teams to identify potential challenges or threats in advance. By understanding these risks, teams can allocate appropriate resources, prioritize test scenarios that address critical functionalities, and determine the overall scope of testing to ensure that key functionalities are thoroughly tested.

Acceptance Testing is a QA process where the software is tested to validate if it's up to the business standards and requirements. It ensures that the system complies with the requirements and validates that the right solution is provided for the end-users as specified in the contract.

In resource planning, it's essential to allocate tasks based on a tester's "Expertise". By doing this, the strengths of each tester are leveraged, ensuring that the testing process is efficient and effective.