Question 6 - Who creates a Product Backlog item's estimate?

• The Product Owner with input from the Development Team

• The most senior people in the organization, including architects and subject matter

• The Development Team after clarifying requirements with the Product Owner

• The Scrum Master

• The Development Team alone

Overall explanation

• The Development Team is responsible for all estimates.
• The Product Owner may influence the Development Team by helping it understand and select trade-offs, but the people who will perform the work make the final estimate.

Question 8 - Who is responsible for estimating the Product Backlog items?

• The Development Team by themselves.

• The Product Owner.

• The Technical Architect.

• The Scrum Master.

• The Development Team after clarifying the requirements with the Product Owner.

Overall explanation

• The ones doing the work are the best ones to create the estimations.

Question 31 - Which concept illustrates that, as a forecast lengthens, the level of unknowns also increase? (choose the best answer)

• Empirical process control

• The "Iron Triangle"

• The "cone of uncertainty"

• Software Product Life Cycle

Overall explanation

• The Cone of Uncertainty describes the evolution of the amount of best case uncertainty during a project.
• At the beginning of a project, comparatively little is known about the product or work results, and so estimates are subject to large uncertainty.
• As more research and development is done, more information is learned about the project, and the uncertainty then tends to decrease.