Hi Dalbir Singh,
Thank you for reaching out to us on the Microsoft Q&A forum.
We appreciate the opportunity to address your inquiry and provide assistance.
The AZ 800 Microsoft Learn course is useful for someone new to understand the concepts. If you are asking whether the Learn course can be referred to during the exam like in an open book exam the answer is NO.
Hope we are able to clarify your doubt regarding the exam.
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Thank you.