Effective handling of database backups in a JIRA environment involves using automated backup tools to ensure regular and reliable backups of the database.

A JIRA Dashboard is a customizable space where users can view a summary of important information such as project progress, issue status, and team performance through gadgets and widgets. It provides a centralized location for tracking key metrics and facilitates better decision-making. Understanding the purpose of a JIRA Dashboard is crucial for efficiently managing projects and staying informed about their progress.

Backlog grooming or refinement meetings in Agile serve the purpose of reviewing and prioritizing backlog items. During these meetings, the team collaborates to refine user stories, ensuring they are clear, feasible, and appropriately prioritized for upcoming sprints. This process helps maintain a well-groomed backlog, which enhances the team's ability to plan and execute iterations effectively, ultimately leading to successful product increments.

Issue type schemes in JIRA enable administrators to define which types of issues are available within each project. By configuring these schemes, teams can ensure that only relevant issue types are available, streamlining the project's workflow and maintaining consistency across different projects. Understanding and managing issue type schemes are crucial aspects of customizing JIRA to suit specific project needs.

The purpose of the Daily Stand-up meeting is to synchronize the team's activities, identify any impediments or roadblocks, and ensure that everyone is on track towards meeting the sprint goal. It's a short, time-boxed meeting where each team member provides updates on their progress, discusses any challenges they're facing, and collaborates on solutions.

Optimizing workflow performance for large teams and projects involves simplifying the workflow to reduce unnecessary complexity and transitions. This helps in streamlining processes, improving efficiency, and minimizing the risk of errors or delays, especially in environments with a high volume of users and issues.

Regularly testing the backup restoration process ensures that JIRA administrators can confidently recover data in case of emergencies. This practice helps identify any potential issues with the backup or recovery procedures and ensures the reliability of the backup system.

In Scrum methodology, tasks are broken down into smaller units called "Tasks." This allows for better management and tracking of progress during the sprint.

The correct option is "2. Permissions." In JIRA's administration settings, permissions are used to control access to various functionalities and features within a project. By configuring permissions, administrators can grant specific rights to groups of users, such as viewing, editing, or administering issues. Navigating to the permissions section allows administrators to manage access control efficiently.

Velocity is usually measured in story points, which represent the relative effort or size of user stories or tasks completed by a team during a sprint. It helps teams in planning and forecasting future work.