Microsoft Security, Compliance, and Identity Fundamentals (SC-900) — Practice Questions and Mock Exam

The SC-900 certification demonstrates foundational knowledge of security, compliance, and identity concepts across Microsoft cloud services. It covers core security concepts, Zero Trust principles, Microsoft Entra identity services, Microsoft security solutions including Defender and Sentinel, and Microsoft compliance solutions including Purview and Compliance Manager. The exam validates broad conceptual understanding without requiring deep implementation skills.

This is an ideal starting point for anyone exploring security, compliance, and identity roles in the Microsoft ecosystem. It suits business professionals, IT generalists, students, and stakeholders who want to understand Microsoft's security and compliance capabilities before pursuing role-based certifications like SC-200 or SC-300.

Microsoft security solutions carry the most weight at 35–40% — core Azure infrastructure security, Sentinel, and Defender XDR make up more than a third of the exam on their own. Microsoft Entra capabilities follow at 25–30%, compliance solutions at 20–25%, and foundational security/compliance/identity concepts trail at just 10–15%.

The weighting means SC-900 rewards breadth across Microsoft's security product line over depth in Zero Trust theory: knowing what Sentinel, Defender for Endpoint, and Defender for Cloud each do outweighs being able to define the six Zero Trust pillars. Candidates who study identity and compliance concepts thoroughly but treat the security-solutions domain as a vocabulary list are underprepared for the largest single domain on the exam.

The exam draws 40–60 questions from a mix of multiple-choice, multiple-select, drag-and-drop, and hot-area formats inside a 45-minute window. Questions test whether you can match a security, compliance, or identity concept to the Microsoft product that implements it, rather than how to configure that product. Most items are direct and conceptual, so the time pressure sits lower than on the associate-level security exams.

Every domain of the SC-900 exam has enough questions in the pool to practice it in depth. A mock exam asks 50 questions in one sitting, on the same 45-minute clock as the real thing.

How long you'll need depends on how much hands-on experience you bring. The rest is set by the vendor: how the exam is delivered, how soon you can retake it, and how long the credential stays valid.

The exam runs through Pearson VUE, either online with a remote proctor or at an authorized testing center, and is offered in English, Japanese, Chinese, Korean, French, German, Spanish, Portuguese, and several other languages. Fundamentals certifications don't expire, so there's no renewal cycle to track.

Zero Trust's six pillars map onto specific Microsoft product areas, and the exam tests that mapping directly rather than a definition of Zero Trust as a principle. Entra's identity features and Defender's security capabilities get confused because they touch related problems from different angles, and Compliance Manager, Purview, and Priva get mixed up the same way despite serving distinct compliance functions. The shared-responsibility model shifts what Microsoft manages versus what the customer manages across IaaS, PaaS, and SaaS, and the four Defender products (for Endpoint, Cloud, Identity, and Office 365) cover different surfaces that are easy to swap in a rushed answer.