Explanation
The best way to gracefully stop any new transactions from processing before applying updates to an application is to enable maintenance mode from the application dashboard. Maintenance mode is a feature that allows temporarily disabling the access or functionality of an application or service while performing maintenance tasks, such as updates, patches, or backups. It also displays a message or notification to the users or clients informing them about the maintenance and the expected downtime. This method will prevent any new transactions from being initiated or interrupted while the updates are being applied. Reference:
[CompTIA Cloud+ Certification Exam Objectives], Domain 3.0 Maintenance, Objective 3.1 Given a scenario, apply appropriate changes to meet performance, security and user requirements.