The correct answers are All workflows will have their statuses consolidated into three default columns To Do In Progress and Done and Some issues will not be visible on the Scrum board.

The reason All workflows will have their statuses consolidated into three default columns To Do In Progress and Done is correct is that a Scrum board maps workflow statuses into board columns. When you create a new board it starts with the default columns To Do In Progress and Done and the various statuses from each project workflow are placed into those columns by the board configuration. You can later edit the columns and explicitly map or move statuses to match how your teams work.

The reason Some issues will not be visible on the Scrum board is correct is that the board only shows issues that match its filter and that are mapped to a column. Any issues in statuses that are not mapped to a column will not appear on the board and the board filter or project permissions can also exclude certain issues from view.

No issues will be displayed on the board is incorrect because a board will display issues that match its filter and that are mapped to one of the board columns. Boards do not default to showing no issues at all.

Statuses are taken only from the first project chosen during board creation is incorrect because the board aggregates statuses from all projects included by the board filter or selection. Statuses are not limited to the first project you pick.

You are prevented from creating a board that includes more than one project is incorrect because Jira lets you create boards that draw from multiple projects by using a filter or by selecting multiple projects when creating the board.

Full AWS Practitioner Certification Question