There are 5 Azure certifications and grouped into three levels such as Fundamental, Associate, and Expert levels.
Fundamentals certifications
- Microsoft Certified: Azure Fundamentals certification
This certification will cost $99 USD
Associate certifications
- Microsoft Certified: Azure Administrator Certification
- Microsoft Certified: Azure Developer Certification
Each exam costs $165.
Expert certifications
- Microsoft Certified: Azure Solutions Architect Expert
- Microsoft Certified: Azure DevOps Engineer Expert
It will be the cost of either two or three exams at a cost of $330 USD to $495 USD (because you need an Associate Certification for this exam).
For more details about these certifications, check out this Azure Certification blog.
Also, watch this video on Azure certifications: