The Udemy course you are signed up for does not include the certification exam.
If you would like to undertake the exam you can purchase access from the Art of Service Training Center.
The exam purchase will also give you access to the full course including a workbook, quizzes and any relevant PDF handouts.
The exam is online and can be sat at any time/date you would like to sit.
Purchase access from the following link: Click Here: Core Series Exam Purchase Link
As Udemy is only eligible to host our courses, cost of the exam will not have been included in the purchase amount made to Udemy.