Popular Microsoft certifications

The fundamentals are a great place to begin. Each links straight into a practice setup with domain-weight-matched questions.

AZ-900: Azure Fundamentals has free, unlimited practice weighted to the official skills outline.
AI-900: Azure AI Fundamentals has free, unlimited practice weighted to the official skills outline.
DP-900: Azure Data Fundamentals has free, unlimited practice weighted to the official skills outline.
MS-900: Microsoft 365 Fundamentals has free, unlimited practice weighted to the official skills outline.
SC-900: Security, Compliance, and Identity Fundamentals has free, unlimited practice weighted to the official skills outline.
PL-900: Power Platform Fundamentals has free, unlimited practice weighted to the official skills outline.