Which group is recommended for testing updates on a limited number of non-production hosts?

The recommended group for testing updates on a limited number of non-production hosts is the Test-QA Group. This group typically focuses on quality assurance and ensuring that updates do not introduce unexpected issues or conflicts before a broader deployment. Members of the Test-QA Group are tasked with evaluating the performance and stability of new updates in a controlled environment, which helps to minimize risks associated with deployment in a live production setting.

By using this group for testing, organizations can identify any problems early and make necessary adjustments based on the feedback and results gathered from the testing phase. This focused approach helps to ensure that any updates released to the wider organization have been verified for compatibility and functionality, contributing to overall system stability and security.

While the other groups mentioned may have important roles in the overall deployment strategy, they do not specifically serve the purpose of testing updates in a controlled, non-production environment like the Test-QA Group does.