Agile testing is?The responsibility of the QA rolePerformed at the end of each sprintNot required until the hardening sprintA collaborative team effort

Agile Testing is a crucial aspect of the Agile development methodology that focuses on quality and efficiency throughout the software development lifecycle. Here’s a detailed breakdown of the options presented:

1. The responsibility of the QA role: While quality assurance (QA) professionals play a significant role in Agile Testing, it is not solely their responsibility. Agile emphasizes shared ownership of quality across the entire team, including developers, business analysts, and other stakeholders.

2. Performed at the end of each sprint: Agile Testing is not limited to the end of each sprint. Instead, testing is integrated throughout the sprint, allowing for continuous feedback and quicker identification of defects.

3. Not required until the hardening sprint: This statement is misleading. Agile Testing should occur continuously rather than being postponed until a so-called "hardening sprint." It enables teams to address issues as they arise, promoting higher quality software.

4. A collaborative team effort: This option accurately reflects Agile Testing's nature. It involves collaboration among all team members, encouraging communication, feedback, and collective responsibility for software quality.

In summary, Agile Testing is indeed a collaborative team effort that integrates testing into every stage of the development process, ensuring that quality is maintained throughout the sprint rather than being the sole responsibility of a specific role or confined to a specific time frame within the project timeline.