This is one guide in a series of guides that can act as study material for Microsoft's new Azure oriented certification exams.
AZ-203 Exam Guide
The AZ-400 exam, which is titled “Microsoft Azure DevOps Solutions” and has a target audience of Azure DevOps Engineers. This exam was in beta for some time and was recently released proper in February 2019. Passing this exam is one requirement to earn the “Microsoft Certified: Azure DevOps Engineer” certification, the other being an “Azure Administrator Associate” or “Azure Developer Associate”.