SC-900 Practice Questions

Security defaults make it easy to protect your organization with the following preconfigured security settings:

Requiring all users to register for Azure AD Multi-Factor Authentication.

Requiring administrators to do multi-factor authentication.

Blocking legacy authentication protocols.

Requiring users to do multi-factor authentication when necessary.

Protecting privileged activities like access to the Azure portal.

In Microsoft’s official guidance, the Microsoft Cloud Adoption Framework for Azure (CAF) is described as the end-to-end approach that “provides best practices, documentation, and tools” to help organizations create and implement business and technology strategies for cloud adoption. The framework aggregates field experience from “Microsoft employees, partners, and customers” and offers prescriptive guidance across strategy, planning, readiness, governance, security, and management to ensure a secure and compliant Azure landing zone. Within SCI-aligned materials, CAF is highlighted as the authoritative body of guidance that helps organizations reduce risk by aligning cloud architecture, identity, security, and compliance controls with Zero Trust principles and regulatory needs. It enables teams to map security baselines, identity governance (e.g., using Microsoft Entra and Conditional Access), and compliance controls (e.g., data protection and regulatory mappings) into deployment blueprints and policy-driven guardrails.

By contrast, Azure Blueprints package artifacts (policies, RBAC, templates) for consistent deployments; Azure Policy enforces and audits configuration through policy definitions; and resource locks prevent accidental modification or deletion. While these are important technical controls, the statement in the question explicitly refers to a body of best practices and guidance that assists an Azure deployment end to end—this is precisely the role of the Microsoft Cloud Adoption Framework for Azure.

multi-factor authentication (MFA)

In Microsoft Entra ID (formerly Azure AD), Security defaults are a baseline of recommended identity protections that, when turned on, automatically apply tenant-wide. Microsoft’s guidance explains that security defaults “help protect your organization with preconfigured security settings” and specifically require that “all users register for Azure AD Multi-Factor Authentication.” When enabled, the defaults enforce MFA challenges for users and admins during risky or sensitive operations, and they block legacy authentication protocols that can’t satisfy modern MFA requirements. Microsoft further notes that security defaults “provide basic identity security mechanisms… such as requiring multi-factor authentication for all users and administrators.” These controls are designed to raise the overall security posture without custom policy design, which is ideal for small and medium organizations or any tenant that hasn’t yet implemented Conditional Access. Therefore, when you enable security defaults, MFA is enabled for all Azure AD users, driving strong authentication as the default and reducing account-takeover risk stemming from password-only sign-ins.

Microsoft’s Zero Trust guidance defines three core principles: “Verify explicitly, use least-privileged access, and assume breach.” In Microsoft’s SCI learning content and Zero Trust overview, the model is described as one that “treats every access attempt as though it originates from an open, untrusted network” and therefore requires explicit verification using all available signals (identity, device health, location, data sensitivity, and anomalies). This directly confirms the first statement as true: Verify explicitly is a guiding principle.

The same guidance states organizations must “assume breach”—designing controls so that if an attacker is already inside, blast radius is minimized through segmentation, Just-In-Time/Just-Enough-Access, continuous monitoring, and rapid detection and response. Microsoft’s Zero Trust materials repeatedly explain to “assume attackers are present” and to “contain and remediate” through defense-in-depth controls, which validates the second statement as true.

Finally, Zero Trust rejects perimeter-based implicit trust. Microsoft clarifies that the model does not rely on a trusted internal network protected by a firewall; instead it “never trusts, always verifies,” continuously enforcing policy regardless of network location (on-premises or internet). Therefore, the statement that Zero Trust assumes a firewall secures the internal network from external threats is false because Zero Trust presumes no inherent safety from being “inside” the network and requires continuous verification and least-privileged access everywhere.

In Microsoft’s Security, Compliance, and Identity guidance, encryption is described as the control that “converts data into a form that cannot be understood by anyone who does not possess the appropriate decryption key.” In the Microsoft Purview Information Protection (sensitivity labels with encryption) documentation, Microsoft explains that when encryption is applied to a file, “only authorized users and services that present the correct keys and usage rights can open and use the content,” and that access is enforced even if the file is moved outside the organization. Azure Rights Management (part of Microsoft Purview) further states that encryption “protects data at rest and in transit by using keys so that only permitted identities can decrypt and use the information.”

This aligns precisely with the sentence: encrypting a file makes the data readable and usable to viewers that have the appropriate key (and unreadable to those who do not). By contrast, archiving organizes or preserves data for long-term storage; compressing reduces file size without controlling access; and deduplicating removes redundant copies to save space. None of these provide the key-based, identity-bound access control described in Microsoft SCI materials. Therefore, the correct completion is Encrypting.

Microsoft’s hybrid identity guidance explains that Microsoft Entra Connect (formerly Azure AD Connect) is the tool used to synchronize identities from on-premises AD DS to a Microsoft Entra tenant, enabling hybrid identity. Microsoft states that hybrid identity is achieved by connecting your on-premises directory with your cloud directory so users have a single identity to access both environments. This does not require two Microsoft 365 tenants; rather, it requires one Microsoft Entra tenant integrated with your on-premises AD DS. For authentication models—Password Hash Synchronization (PHS), Pass-through Authentication (PTA), or federation (AD FS)—Microsoft specifies that directory synchronization is required so that user objects exist in Entra ID and can authenticate to cloud services while maintaining a consistent identity. Thus, Entra Connect is used to implement the synchronization underpinning hybrid identity; two M365 tenants are unnecessary; and synchronization between AD DS and Entra ID is required for authenticating hybrid identities across Microsoft cloud services.