Let's a take a look at the Heat exam objectives.
Figure 9.4 breaks down various Heat-related objectives you should be responsible for knowing in the COA exam. As you can see, all of these tasks can be completed on both the Horizon dashboard and CLI. Remember that time is of the essence during the exam, and in many cases, it can be much faster to tackle a task on the dashboard.
Figure 9.4: Heat exam objectives can be performed on the Horizon Dashboard or CLI