Database tuning in JIRA system maintenance involves optimizing database queries to improve performance by reducing execution time and resource consumption.

In JIRA, the "Story" issue type is typically used to represent user requirements or user stories. User stories describe specific functionality or features from an end user's perspective and are commonly used in agile development methodologies.

In JIRA, an issue can only be assigned to one assignee at a time. Assigning to multiple assignees is not a built-in feature. Each issue can have only one assignee responsible for it. This helps maintain accountability and clarity regarding who is responsible for resolving the issue.

The backlog in a Scrum board serves as a prioritized list of features, user stories, or tasks that need to be completed during the project. It represents the product backlog and is constantly refined and updated based on feedback and changing requirements.

The system dashboard provides an overview of JIRA's performance and key metrics, helping administrators monitor and manage the system effectively.

Post-functions automate actions that occur after an issue transitions, streamlining processes and ensuring consistency. They can be predefined or custom-built based on specific workflow requirements.

Adding conditions to workflow transitions allows for controlling when a transition is available based on specific criteria, such as issue fields, user roles, or statuses. This helps in ensuring that transitions occur only when certain conditions are met, thus enforcing business rules and maintaining data integrity in the workflow.

When creating a sub-task in JIRA, you can specify its type and summary. These attributes help define the nature of the sub-task and provide a clear understanding of its purpose within the parent issue.

The correct option is "Scrum framework". The Scrum Master ensures that the Scrum Team adheres to the principles and practices outlined in the Scrum framework, facilitating the team's progress and adherence to its processes.

Agile emphasizes delivering incremental value to customers frequently, allowing for rapid feedback and adaptation based on customer needs and market dynamics, thereby enhancing overall project success.

In JIRA, you can trace the relationship between linked issues by running a custom JQL (JIRA Query Language) query. JQL allows you to search for issues based on various criteria, including issue links. By specifying the appropriate JQL query, you can identify issues that are linked to a particular issue or issues that are linked in a specific way. This provides a powerful means of tracing relationships between issues and gaining insights into their dependencies and connections within the JIRA environment.

JIRA Automation Rules can help reduce manual effort in your project by automating repetitive tasks and streamlining workflows. This can lead to increased productivity and reduced chances of human error.