When preparing for the Alteryx Core exam it's important to be aware of every tool in the favorite's Tab
A lot of the questions will require you to summaries data and match it to an output.
Another part of the exam will require you to troubleshoot different problems in Alteryx. So make sure you are familiar with the configuration pane in Alteryx and what the correct configuration of each tool should look like for tasks at hand.
Be familiar with the different types of workbooks available and the extensions that Alteryx has for each of them.
Finally, make sure you have used Alteryx, get familiar with a workflow and be able to answer the multiple choice questions quickly, so there is more time to do the summerise questions as they take longer than you'd think .